GOST 25905-83

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  ГОСТ 25905-83

GOST 25905−83 aluminium Foil for capacitors. Specifications (with Amendments No. 1, 2)

GOST 25905−83

Group В53

STATE STANDARD OF THE USSR

ALUMINIUM FOIL FOR CAPACITORS

Specifications

Aluminium foil for condensers. Specifications

GST 18 1119

Valid from 01.01.85
in the part of the foil type 4; part of the foil width from 5 to 9 mm incl. from 01.01.86
in terms of foil thickness from 0,005 to 0,006 mm incl.
high precision rolling 01.01.87
until 01.01.93*
_______________________________
* Expiration removed
according to the Protocol of the Intergovernmental Council
for standardization, Metrology and certification
(IUS N 2, 1993). — Note the manufacturer’s database.

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry of nonferrous metallurgy of the USSR

THE DEVELOPERS OF THE STANDARD

Sawakin Y. F., doctor of engineering. Sciences; Y. M. leybov, PhD. tech. Sciences; I. A. Vorobyova

2. APPROVED AND put INTO EFFECT by Decision of the USSR State Committee for standards from 24.08.83 N 3950

3. INTRODUCED FOR THE FIRST TIME

4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

The designation of the reference document referenced	The item number, app
GOST 427−75	4.2
GOST 1847−79*	5.5
_______________ * Corresponds to the original, here and hereafter. — Note the manufacturer’s database.
GOST 2991−85	5.2 a
GOST 3282−74	5.2 a
GOST 3560−73	5.2 a
GOST 3956−76	5.2.2, 5.2.3
GOST 4461−77	Appendix 3
GOST 4784−74	2.2, Annex 2B
GOST 5962−67	Appendix 3
GOST 6221−82	Appendix 3
GOST 6318−77	Appendix 3
GOST 6933−81	4.2
GOST 7376−84	5.2.2, 5.2.3, 5.2 and
GOST 7855−84	Annex 2
GOST 8828−75	5.2 a
GOST 9078−84	5.2 a
GOST 9557−87	5.2 a
GOST 10106−75	Appendix 3
GOST 10354−82	5.2.2, 5.2.3
GOST 11069−74	2.2, Annex 2B
GOST 12697.6−77	4.7
GOST 12697.7−77	4.7
GOST 12697.8−77	4.7
GOST 12998−85	5.2.1
GOST 13830−84	Appendix 3
GOST 14192−77	5.3
GOST 14919−83	Appendix 3
GOST 16295−82	5.2.1
GOST 17133−83	5.2.1
GOST 18477−79	5.2 and 5.5
GOST 21458−75	Appendix 3
GOST 21929−76	5.2 a
GOST 24231−80	4.6

5. Validity extended until 01.01.93 by the Resolution of Gosstandart of the USSR from 26.06.89 N 2030

6. REPRINT (August 1989) with Amendments No. 1, 2 approved in June 1987, June 1989 (IUS 10−87, 11−89).


This standard applies to rolled aluminum foil used to manufacture capacitors.

1. ASSORTMENT

1.1. Thickness, width, tolerance on thickness and width shall be as specified in table.1 and 2.

1.2. The foil should be wound on a sleeve with an inner diameter of 34−36; 50−52; 68 to 70 and 70 to 75 mm.

Maximum deviations along the length of the sleeve for foil width up to 400 mm — ±0.5 mm, for foil of a width exceeding 400 mm — ±1 mm.

By agreement between the consumer and the manufacturer, the foil can be wound onto the other sleeve diameters.

1.3. The outer diameter of the roll of foil with a thickness of 0,005−0,016 mm should be 150−200 mm. In coordination with the consumer the outer diameter of the roll of foil can be increased. Allowed the rolls of foil with a diameter of 100 mm in an amount of not more than 10% of the batch weight.

Table 1

mm

Thickness	Maximum deviations in thickness		Width
normal accuracy	increased accuracy for foil
0,005 0,006 0,007	±0,001	+0,0005 -0,001	10−500
0,008 0,009 0,010	+0,0008 -0,0009
0,011	+0,001 -0,002	±0,001
0,012 0,014 0,016
0,020	±0,002	-
0,030	±0,003
0,040	+0,004
0,050	±0,004
0,060	±0,006	±0,005
0,070	±0,006
0,080	+0,005 -0,010
0,100	+0,005 -0,010	±0,005	20−500
0,150	+0,005 -0,015	-

Notes:

1. Foil is made from aluminum brand A99 is made in thickness from 0.050 mm or more.

2. Foil is produced across the width at intervals of 5 mm.

3. At the request of the consumer, the foil is made of a width from 5 to 20 mm (incl.) at intervals of 1 mm and a width of 21, 22, 23, 24, 27, 28, 29, 32, 33, 34, 37, 38, 39, 42, 43, 44, 47, 52, 53, 55, 57, 58, 63, 67, 69, 72, 73, 77, 78, 83, 87, 91, 92, 93, 127 mm.

Table 2

mm

Width	Maximum deviations in width
To 130 incl.	±0,5
SV. 130 to 300 incl.	±1,0
SV. 300	±1,5

The outer diameter of the roll of foil with a thickness of 0,020−0,150 mm should be 250−300 mm. By agreement between the consumer and the manufacturer is allowed to manufacture foil in rolls with a diameter of over 300 mm.

The legend shall appear on the diagram

when the following abbreviations:

manufacturing method: cold-drawn	— D;
sectional shape: rectangular	— PR;
accuracy of manufacturing: normal	— N;
increased	— P;
condition: soft	— M;
solid	— T;
foil type	— 1, 2, 3, 4, 5.

Examples of symbols

Foil with a thickness of 0.050 mm, normal precision, width 500 mm, soft, aluminum brand A99, type 1:

Foil DPMM 0,050х500А99−1 GOST 25905−83

Foil thickness 0,016 mm, normal precision, with a width of 270 mm, soft aluminium brand A5:

Foil DPMM 0,016х270 A5 GOST 25905−83

Foil thickness 0,016 mm, high precision, width 270 mm, solid aluminium brand A5:

Foil DPCT 0,016х270 A5 GOST 25905−83

(Changed edition, Rev. N 2).

2. TECHNICAL REQUIREMENTS

2.1. Foil produced in accordance with the requirements of this standard for technological regulations approved in the prescribed manner.

2.2. The foil should be made of aluminium brands A99, A6, A5 according to GOST 11069−74* brands and AD0, AD1 GOST 4784−74**.
________________
* On the territory of the Russian Federation the document is not valid. Valid GOST 11069−2001, here and hereafter;
** In the territory of the Russian Federation the document is not valid. Valid GOST 4784−97, here and hereafter. — Note the manufacturer’s database.

By agreement with the consumer it is allowed manufacture of a foil of aluminum, optionally doped with iron up to 1.2% by weight, or aluminum with a mass fraction of iron to 0,007%, silicon, up to 0.008%, copper up to 0,0045% of the total mass fraction of impurities not more than 0.02%.

2.3. The foil must be manufactured in the soft (annealed) and hard untrimmed (unannealed) condition.

2.4. The foil should not be extraneous inclusions and surface dirt, folds, tears, nicks, corrosion, aluminum dust, chips and stains from burnt lubrication.

Foil thickness of 0.005−0.050 mm in the soft state should not have any traces of grease.

Allowed on the foil with thickness 0.030 mm and less small holes, visible with the naked eye against the light, in the absence of their accumulation and stroke location;

on the foil thickness greater than 0,030 mm holes, the number and location of which shall be established in consultation with the consumer;

the transverse strips formed from the uneven tensioning of the foil along the length of the roll;

prints from rolls, not impeding the free rolling of foil from the roll.

In coordination with the consumer the quality of the surface of the foil, the number and location of holes are determined according to the standards agreed in the prescribed manner.

2.5. The mechanical properties of the foil shall conform to the requirements specified in table.3.

Table 3

Aluminum grade	Foil thickness, mm	Temporary resistance, MPa (kgf/mm), not less		Elongation, %, not less
soft	solid	soft	solid
A6, A5, AD0, AD1	From 0,005 to 0,006 incl.	-	-	-	-
SV. 0,006 0,011 to incl.	30 (3,0)	100 (10)	-	-
SV. Is 0.011 to 0.045 incl.	30 (3,0)	100 (10)	2,0	-
SV. To 0,045 0,150 incl.	40 (4,0)	120 (12)	3,0	-
A99	From 0.005 to 0.150 in incl.	30 (3,0)	100 (10)	3,0	-

Notes:

1. The tensile strength of a soft foil with a thickness of 0,007 mm for power capacitors shall be not less than 40 MPa (4.0 kg/mm).

2. At the request of the consumer for foil type 2 aluminum brand A99 temporary resistance soft foil must be at least 32 MPa (3,2 kgf/mm), elongation of the soft foil of at least 4.0%.

2.6. The specific capacity of a foil of aluminum brand A99 shall meet the requirements table.4.

Table 4

Condition	Foil type	Thickness, mm	Specific capacitance, µf/DM	Limit deviation, %	Voltage forming ,
Annealed	1	0,10	22	-10	450
2	0,10	29
3	0,08	20
4	0,08	25
Untreated	5	0,10	1700	30
6	0,08	1100

Notes:

1. The upper limit of the rate the specific capacity is not regulated.

2. It is possible to produce foils of other sizes with increased specific capacity corresponding to the next lowest size of the foil thickness.

2.4−2.6. (Changed edition, Rev. N 2).

2.7. The foil should be wound with tension, eliminating the possibility of loss, rotate the bushing or the offset of turns by shaking the coil.

The ends of the roll must be free of nicks, dings and dirt.

For foil of a thickness of > 0.020 mm allowed the displacement of the coils and the ends of the roll to 1.5 mm.

2.8. The entire length of the foil roll should be easily unwound and the foil edge must be free of burrs or tears.

One roll is allowed:

for a foil with a thickness of 0.010 mm or less — no more than five breaks;

for a foil with a thickness of more than 0,010 to 0,030 mm inclusively — no more than four breaks;

for foil thickness in excess of 0.030 to 0.060 mm inclusively — no more than three breaks;

for foil thickness in excess of 0.060 mm — no more than one breakage.

Stripping the ends of coils of the foil thickness of 0.005−0.010 mm in places the cliffs foil is not carried out. The edge of the foil must not protrude beyond the end face of the roll by more than 2 mm.

By agreement with the consumer allowed to sweep the ends of the coil to the ground of the cliff.

(Changed edition, Rev. N 2).

2.9. Theoretical weight of 1 mof foil in the reference Appendix 1.

3. ACCEPTANCE RULES

3.1. Foil take parties.

The party should consist of a foil one destination, one brand of aluminum, single precision manufacturing, one state, one size and decorated with a single document about quality that contains:

trademark or a trademark and the name of the manufacturer;

the symbol foil;

the weight of the party;

batch number;

the results of the tests;

the number of seats (when packing into boxes);

stamp of technical control.

Mass party foil aluminum brand A99 should not exceed 5 tonnes of aluminium brands AD0, AD1, A6, A5 — 30 t

(Changed edition, Rev. N 2).

3.2. To check the size, surface condition and lubrication of the party take 5% rolls, but at least three rolls.

3.3. To determine the mechanical properties of the party selected 2% of the coils, but not less than two.

The tensile strength of a soft foil with a thickness of 0.005−0.006 mm is determined on each batch to collect data with the purpose of the valuation from 01.01.92. The mechanical properties of the foil thickness 0,007−0,150 mm are determined periodically at the request of the consumer.

(Changed edition, Rev. N 2).

3.4. To determine the specific capacity of the party take one roll.

3.5. To check the chemical composition of the party take one roll. Allowed the manufacturer to verify chemical composition to acquire a sample from the liquid metal.

On the factory foil allowed the analysis of the chemical composition foil aluminum brand A99. Compliance with the chemical composition of the foil stamps A99 is determined by the document about the quality of the ingot of the manufacturer of the ingot.

(Changed edition, Rev. N 2).

3.6. If unsatisfactory test results of at least one indicator thereon, a second test of the doubled sample. The results of repeated tests apply to the entire party.

4. TEST METHODS

4.1. To check the surface quality and size from the roll is unwound 3−5 m of foil. Examination of the foil should be carried out without the use of magnifying devices.

4.2. Foil thickness measuring head is tested according to GOST 6933−81*. For the measurement of the foil thickness up to 0.01 mm is applied to the head of GP and IGPU with divisions of 0.1−0.2 µm and the radius of the measuring tip 5 mm according to GOST 6933−81*.
________________
* On the territory of the Russian Federation the document is not valid. Standards 28798−90. — Note the manufacturer’s database.

The width of the foil is measured with a metal ruler according to GOST 427−75.

4.3. Check the grease on the foil is carried out according to the method of compulsory or mandatory application 2 application 2A.

In case of discrepancies, check the grease on the foil is carried out according to the method of application 2.

4.4. Mechanical properties of samples determined by the method required applications 2B.

At the request of the consumer less than the foil width 15 mm are supplied the specimens with a minimum width of 15 mm for testing according to the method of application 2B.

4.5. Check the specific capacity in static conditions the methodology required applications 3.

To check the specific capacity from the same roll party selected cut the foil length of not less than 0.7 m. From each segment selected three samples.

4.2−4.5. (Changed edition, Rev. N 2).

4.6. Selection and preparation of samples for the determination of chemical composition is carried out according to GOST 24231−80.

4.7. Determination of chemical composition shall be carried out according to GOST 12697.6−77-GOST 12697.7−77, or other methods of equal accuracy standard.

The differences in the evaluation of the chemical composition analysis is carried out according to GOST 12697.6−77-GOST 12697.7−77.

(Changed edition, Rev. N 2).

5. PACKING, MARKING, TRANSPORTATION AND STORAGE

5.1 Each roll of foil must be wrapped with a paper tape of a width equal to the width of the foil.

On each roll in foil, attach a label indicating:

trademark or a trademark and the name of the manufacturer;

legend foil;

batch number;

stamp of technical control;

the date of issue.

5.2. Packaging of foil rolls

5.2.1. The rolls of foil or a set of several rolls are Packed in a specialized reusable collapsible container according to normative-technical documentation.

The ends of the coils or multiple coils protect the through-metal or plastic disks. Between the discs and the ends of the roll and between rolls included in a set, put inhibited paper brand of MGI 8−40 GOST 16295−82* inhibited or strip other types according to normative-technical documentation.
________________
* On the territory of the Russian Federation the document is not valid. Standards 16295−93. — Note the manufacturer’s database.

To protect the ends of the coil from mechanical damage to the lining of the inhibited material is placed a pad of foam polystyrene according to GOST 12998−85 thickness of 5−10 mm or soft rubber according to GOST 17133−83 or according to normative-technical documentation. The diameter of the spacers from inhibited materials, polystyrene and rubber should be at least 10 mm larger than the diameter of the roll.

Assembled specialized collapsible reusable containers should be tightly strapped. Specialized containers and packing materials shall be returned to the manufacturer.

5.2.2. Each roll should be Packed in polyethylene film with a thickness of 0.1−0.3 mm according to GOST 10354−82. Inside the package put the silica gel according to GOST 3956−76 in bags made of porous fabric or perforated polyethylene in an amount of not less than 30 g.

The ends of the rolls should be protected from mechanical damage, the strips of corrugated cardboard according to GOST 7376−84* or other cushioning material.
________________
* On the territory of the Russian Federation the document is not valid. Valid GOST R 52901−2007, here and hereafter. — Note the manufacturer’s database.

The open ends of the film must be twisted tightly and tied with a twine made of synthetic materials according to normative-technical documentation.

5.2.3. The rolls of foil during transport in the suspended condition wrapped in plastic film with a thickness of 0.1−0.3 mm according to GOST 10354−82. Inside the package is embedded silica gel according to GOST 3956−76 in bags made of porous fabric or perforated polyethylene in an amount of not less than 30 g.

The ends of the rolls should be protected from mechanical damage, the strips of corrugated cardboard according to GOST 7376−84 or other cushioning material.

The open ends of the film must be twisted tightly around a wooden rod and tied with twine made of synthetic materials according to normative-technical documentation or taped.

By agreement with the consumer allowed other ways of packaging and protection of the rolls of foil from corrosion and mechanical damage. The way of packing is stipulated in the purchase order.

5.1, 5.2 (5.2.1−5.2.3). (Changed the wording, Rev. N 2).

5.2. The rolls of foil in a specialized collapsible reusable containers are placed in containers, vans in horizontal or vertical position.

The rolls of foil, Packed in plastic wrap, placed in containers churchyard 18477−79*, RVS or boxes of the types III-1, III-2 according to GOST 2991−85 on end or horizontally. The rows of coils must be protected from mechanical damage corrugated cardboard according to GOST 7376−84 or other cushioning material.
________________
* On the territory of the Russian Federation the document is not valid. Valid GOST R 53350−2009. — Note the manufacturer’s database.


The rolls of foil, Packed in plastic film and transported in a suspended condition shall be worn on wood studs, reinforced between the wooden struts of the container or box.

Containers, vans and boxes should be lined with two-layer paper packaging according to GOST 8828−75*.
________________
* On the territory of the Russian Federation the document is not valid. Valid GOST 8828−89. — Note the manufacturer’s database.

The foil rolls should be laid and reinforced so that they do not move during transportation.

Weight of cargo must not exceed 1250 kg.

Consolidation packages in overpacks shall be conducted in accordance with the requirements of GOST 21929−76*.
________________
* On the territory of the Russian Federation the document is not valid. The rules for the carriage of goods approved by the relevant departments. — Note the manufacturer’s database.

Packaging is carried out on pallets according to GOST 9557−87, GOST 9078−84 on wooden or metal pallets according to normative-technical documentation, with the strapping in the longitudinal and transverse directions with wire of diameter not less than 2 mm according to GOST 3282−74 or tape not less than 0,3х30 mm according to GOST 3560−73. Bond tips: twist the wire at least 5 turns of tape to the castle.

(Added, Rev. N 2).

5.3. Transport marking of packages should be performed according to GOST 14192−77* with application of manipulation signs: «Afraid of dampness," «Caution, fragile», «Top, do not turn over».
________________
* On the territory of the Russian Federation the document is not valid. Valid GOST 14192−96. — Note the manufacturer’s database.

5.4. In each container or box shall be attached to packing list stating:

trademark or a trademark and the name of the manufacturer;

brand of aluminium;

the dimensions of the foil;

batch number;

rooms of the packer;

designation of this standard.

5.5. Transportation of the foil should be carried out by rail in covered wagons, containers, CMX-3, CMX-5, GOST 1847−79 small or carload tonnage by types of shipping; road transport with caravans, cars and air transport in accordance with goods transportation regulations applied to this type of transport.

5.6. The foil should be stored in heated premises unpacked on the shelves, upholstered in a soft material or on the racks in limbo.

Stock must not at the same time with foil to store active chemicals and absorbent materials.

The rolls of foil in widths up to 200 mm is placed on the ends and put soft pads, rolls of foil with a width of 200 mm is placed horizontally, separating the rows of pads. Under specified storage conditions aluminum foil for capacitors of consumer properties during storage does not change.

5.5, 5.6. (Changed edition, Rev. N 2).

ANNEX 1 (reference)

ANNEX 1
Reference

Thickness, mm	Theoretical weight 1 m, g
0,005	13,5
0,006	16,2
0,007	18,9
0,008	21,6
0,009	24,3
0,010	27,0
0,011	29,7
0,012	32,4
0,014	37,4
0,016	43,2
0,020	54,0
0,030	81,0
0,040	108,0
0,050	Of 135.0
0,060	162,0
0,080	216,0
0,100	: 270.0 cm
0,150	405,0

When calculating the theoretical mass density of aluminum is taken equal to 2.7 g/cm.

(Changed edition, Rev. N 2).

ANNEX 2 (mandatory). A METHOD OF CHECKING THE PURITY OF THE SURFACE OF THE FOIL HALIDE OCEANATLAS GTI-3 GTI-6

ANNEX 2
Mandatory

The method is based on the property of a heated platinum wire (filament) of the sensor devices to increase the ion emission from the surface in the presence of fumes and gases produced during the decomposition of organic compounds under high temperature.

To increase the area of capture of gases and smoke from the surface of the foil to the external probe of the device is provided with a conical nozzle with an area capture 100 cm.

Check the surface of the foil is held in a room with clean air. The presence in the room of the smoke and gases is not allowed. Relative humidity should be no more than 80%, temperature (25±10) °C.

Check the foil should have a temperature not lower than the temperature of the room in which it is being tested (to avoid water condensation).

Unpacking rolls is recommended in the room where they will be tested.

Inspection carried out on the samples having a surface area of 100 cm. From each roll selectively from different places take 8−10 samples and check both sides of the foil. In the course of preparation and testing necessary to exclude contamination check of the surface (arm, etc.).

Samples of the foil are alternately placed on a preheated hotplate surface and simultaneously covered with a nozzle probe. For heating of the foil samples used the unit closed type with a capacity of 400−800 W, which is switched on for 15−20 min before inspection.

After 2−3 s of exposure count the readings of the measuring unit. The sensor switch device should be installed in position 8.

With no lubricant on the surface of the foil needle remains in the zero position.

ANNEX 2A (required). A METHOD OF CHECKING THE PURITY OF THE SURFACE OF THE FOIL DRIP METHOD

ANNEX 2A
Mandatory

The essence of the method is based on properties of a drop of distilled water is not spread with oil on the surface of the foil.

1. Apparatus, reagents and materials

Dropper.

Distilled water.

2. Testing

To unwind from the roll a few turns of foil, giving tests just exposed surface. If the foil has a matte and glossy surface, a test is carried out on a matte surface. On the surface of the foil from a dropper filled with distilled water, apply a drop at three sites across the width of the foil (edge, middle, edge).

Surface finish is evaluated by diagrams given on features.1−5, showing the position of the sample, the shape of the spreading droplet and the surface condition.

Damn.1. The horizontal position of the sample

The horizontal position of the sample

Damn.1

Damn.2, hell.3. Satisfactory surface condition. The inclined position of the sample in the direction of arrow

The inclined position of the sample in the direction of arrow

Damn.2	Damn.3

Satisfactory surface condition

Damn.4, hell.5. The poor state of the surface. The inclined position of the sample in the direction of arrow

The inclined position of the sample in the direction of arrow

Damn.4	Damn.5

The poor state of the surface

Lack of lubrication on the surface of the foil corresponds to hell.1, 2, 3. The presence of grease on the surface of the foil corresponds to hell.4, 5.

ANNEX 2B (required). METHOD SAMPLE PREPARATION AND TESTING TENSILE ALUMINUM FOIL FOR DETERMINATION OF MECHANICAL PROPERTIES

ANNEX 2B
Mandatory

This method defines the procedure for the preparation of samples for testing and conduct tensile testing to determine mechanical properties (temporary resistance; elongation after fracture) of rolled foils of aluminum of the brands A99, A5, A6 according to GOST 11069−74 and AD0, AD1 GOST 4784−74.

1. Equipment, reagents, materials

Aluminium foil thickness from 0.007 to 0.150 mm.

Glass size not less than 150х250 mm.

Blade guillotine shear (or milling machine).

Metal ruler.

The measuring head spring.

Caliper.

Tensile testing machine according to GOST 7855−84*.
________________
* On the territory of the Russian Federation the document is not valid. Standards 28840−90. — Note the manufacturer’s database.

2. Preparation of samples to test

2.1. To determine the mechanical properties of each selected roll cut off a piece of foil length of not less than 2 m for the manufacture of three samples.

Samples for tensile tests should be cut in the form of strips with a width of (15,0±0,20) mm and the allowable difference between maximum and minimum width along the length of the working part of the specimen 0.10 mm, working length 150 mm Samples cut along the direction of rolling.

Samples of the foil thickness 0,007−0,100 mm cut with a razor blade on glass with a steel ruler, a thickness of more than 0,100 mm — guillotine shears or made on a milling machine. Allowed other ways of making samples to ensure the required accuracy and lack of tears, burrs along the length of the sample.

2.2. The measurement of the thickness and width of the test specimen is carried out in accordance with the requirements given in the table.

Readout	Measurement range, mm	Applied instruments	Notes
The thickness of the sample	0,005−0,012	The measuring head spring 02 IGP (02ИГПВ), interval 0.2 mm	Allowed the use of other measuring instruments that ensure accurate measurements set for the instrument specified types
0,012−0,030	The measuring head spring 05 IGP (05ИГПВ), the price of division of 0,5 µm
more than 0,030	Indicator multi-turn 1МИГ (1МИГП), graduation 1 micron
Sample width	15±0,2	Caliper ШД1 with divisions of 0.05 or 0.1 mm

The measurement is performed in at least three points in the middle part of the sample and on the borders of the working (current) length of the specimen.

2.3. The test speed is set to 20−50 mm/min depending on the estimated length.

2.4. Is determined by the cross-sectional area, in mm, calculated by the formula

,

where is the least thickness, mm;

 — the smallest width, mm.

The value of the cross sectional area is rounded to 0.01 mm.

2.5. Blanks for samples and the samples marked by the batch number or the conditional index outside of the working part.

2.6. Set the initial estimated length limit risks caused by weak or scratching with a pencil. Apply the ticks and other ways, excluding damage of the sample surface, which can cause invalid test results.

Risks (labels) applied at intervals of 10 mm.

3. Testing and processing of results

3.1. To determine the time resistance of the sample is subjected to tension under the action of the smoothly increasing load to failure. The greatest load prior to failure of the specimen, taken as the load corresponding to the ultimate strength.

Rupture strength () MPa (kgf/mm), calculated according to the formula (accurate to 0.1 MPa).

3.2. The elongation of the sample after the gap (), %, is calculated by the formula (accurate to 0.1%),

where

 — the initial gauge length equal to 100;

 — the gauge length after rupture.

To determine the length of the calculated part of the specimen after the rupture destroyed a part of the pattern is densely formed so that their axes form a straight line. If after the test in the place of break a gap caused by partial chipping of metal and other reasons, it is included in the length calculation of the sample after rupture.

3.3. The test will be considered invalid:

1) at break of the specimen in the grips of the testing machine or outside the estimated length (in the determination of elongation);

2) at rupture of a sample for defects of metallurgical production (rassai, gas shells, slivers, etc.);

3) the formation of two or more of the tear;

4) when errors are detected in the test.

3.3.1. In these cases, the tensile test should be repeated on the selected from the same batch or a new melting samples. The number of test samples recognized as invalid instead must match the number of invalid tests.

3.3.2. The results of each test are recorded in a special magazine issued with the test report. The form of test results is a document for the certificate.

Applications 2A and 2B. (Added, Rev. N 2).

APPENDIX 3 (obligatory). METHODS OF CONTROL OF SMOOTH ALUMINUM FOIL ON THE VALUE OF THE SPECIFIC CAPACITANCE

APPENDIX 3
Mandatory

Static regulation is made in accordance with the technological operation (tab.1).

Table 1

Technological operation static regulation foil
The operation number	High-voltage foil	The operation number	Low-voltage foil
1	Krasovka	1	Degreasing
2	Cutting samples	2	Krasovka
3	The etching on the installation	3	Cutting samples
4	Rinsing in tap water	4	The etching on the installation
5	Rinsing in nitric acid	5	Rinsing in tap water
6	Rinsing in tap water	6	Rinsing in nitric acid
7	Dechlorination of	7	Rinsing in tap water
8	Rinsing in deionized water	8	Dechlorination of
9	Drying	9	Rinsing in deionized water
10	Forming and measuring the electrical characteristics	10	Drying
11	Annealing
12	Forming and measuring the electrical characteristics

1. Preparation of electrolyte etching and nitric acid

1.1. Before the beginning of work to inspect the installation of UB.696 or UB.738 in accordance with the working instructions and safety instructions.

1.2. Preparation of electrolyte

1.2.1. Equipment, reagents, solutions

Salt according to GOST 13830−84*.
________________
* On the territory of the Russian Federation the document is not valid. Valid GOST R 51574−2000. — Note the manufacturer’s database.

Sodium sulfate crystallization of the highest grade according to GOST 21458−75 or the sodium sulfate of the highest grade according to GOST 6318−77.

Polyethylene glycol — PEG.

Polyethylene glycol PEG-35.

Setup for the static rationing foil UB.696 or UB.738.

Libra technical.

1.2.2. For the preparation of the electrolyte in the etch tank is filled with 10 DMof deionized water and load components of the etching solution. The compositions of the electrolyte etching are given in table.2. After loading the tank starts heating up. Pre-contact thermometer is set to the required temperature (see table.2).

Table 2

Modes static rationing foil

Room technology strategic operations	The composition of the electrolyte	Temperature, °C	Current density, A/DM	Time
Low-voltage foil
1	Trichloroethylene, СlСН-СlСor other cleaning agents	20−30	-	5 min
4	An aqueous solution of NaCl (150±10) g/DM, NaSOanhydrous — (17±3) g/DM or NaSO·10HO — (40±5) g/DM, PEG-35 — (0,5±0,05) g/DM	92±3	140	45
5	Tap water	20−30	-	From 2 to 15 min.
6	2 N, solution NGOS	20−30	-	105
7	Tap water	20−30	-	From 2 to 15
8	Tap water	20−30	1,5	210
9	Deionized water 1 mω·cm	20−30	-	From 10 to 30 min.
10	Air	-	-	-
11	In laboratory furnaces	400	-	2 hours
High-voltage foil
3	An aqueous solution of NaCl (17±3) g/DM, NaSOanhydrous — (7,5±1,5) g/DM or NaSO·10HO — (17±3) g/DM, PEG-35-(0,1±0,01) g/DM, NaCl 17 g/DM, NaSO·10HO — 17 g/DM, PEG-35 — 0,1 g/DM	70±3	100	95
4	Tap water	20−30	-	From 2 to 15 min.
5	2 N, a solution of HNO	20−30	-	105
6	Tap water	20−30	-	From 2 to 15 min.
7	Tap water	20−30	0,4	105
8	Deionized water 1 mω·cm	20−30	-	From 10 to 20 min.
9	Air	-	-	-

1.2.1, 1.2.2. (Changed edition, Rev. N 2).

1.3. Preparation of the solution of nitric acid

1.3.1. Equipment, reagents, solutions

Nitric acid GOST 4461−77, h.d. a.

Water is piped.

The fume hood.

Rubber gloves.

Chemical utensils: measuring cups, beakers.

1.3.2. Chemical volumetric flask with a capacity of 1 DMpour 0.5 DMwater and add 128 cmof concentrated nitric acid (1.42 g/cm), then add water up to 1 DM.

To work in rubber gloves in a fume hood. To check up correctness of preparation of the solution by density measurement. 2 N nitric acid solution at 20 °With a density of 1,067 g/cm.

1.3.3. Pour the prepared solution of nitric acid in the corresponding reservoir to install UB.696 or UB.738.

Before pouring, close the drain valve and nitric acid to set the receiver in place to discharge acid.

(Changed edition, Rev. N 2).

2. The etched foil

2.1. Sample preparation

2.1.1. Equipment, reagents, solutions

Rectified ethyl alcohol according to GOST 5962−67*.
________________
* On the territory of the Russian Federation the document is not valid. Valid GOST R 51652−2000, here and hereafter. — Note the manufacturer’s database.

The trichloroethylene.

A pair of scissors.

Rubber gloves.

Template for sample making foil size 24х52 mm.

A glass chemical.

2.1.2. From the beginning of the roll, smooth the foil to cut out samples of size 100х370 mm Krzewina samples is carried out on the machine krasovki type УММ3 190.000 consistently on both sides. Pokracovanie the surface should have a matte color without gaps. From each roll crached for three samples.

Damn.1. The foil pattern for the valuation (including edges)

The foil pattern for the valuation (including edges)

Damn.1

2.1.3. Solid foil for low voltage capacitors before grazevaya degreased. To do this, cut samples of the foil are placed in a beaker or bath of trichloroethylene and kept 5 min at room temperature. The samples were then washed thoroughly with running tap water and air dried.

1−2 DMdegreasers allow for the processing of 100−120 samples.

2.1.2, 2.1.3. (Changed edition, Rev. N 2).

2.1.4. Of brushed of a piece of foil cut out samples of a lever type. The sample must be working part 24х52 mm and output electrical connections (DWG.1). At the conclusion of the write room and the party roll. To work in rubber gloves, fat-free alcohol. Working tool also wiped with alcohol.

2.2. Etching samples

2.2.1. Etching of the samples is carried out according to the modes specified in table.2.

Previously in the cell for etching establish a control sample. Cell with the reference sample set into a bath of etching.

The sample is connected to the power source. Then switch on the power supply and smooth adjustment set the required current value.

Then, without removing specified value of current, disconnect the power supply with the toggle switch. Subsequent etching of each sample to include power only with the switch. This is necessary in order to ensure the supply of etching a throw (not continuously adjustable).

2.2.2. After installing the current etching (see p.2.2.1) etching is carried out has been prepared (see p.2.1) samples of foil. For this sample set in cell etching, connected to the terminals of the power source and serves the appropriate current etching (throw). At the same time include a stopwatch.

2.2.3. The working electrolyte in the process is not controlled. After processing 100−120 samples of foil on the installation of UB.738 and 500 samples for the installation of UB.696 electrolyte etching you need to change.

(Added, Rev. N 2).

Damn.2. The scheme of molding the samples at the regulation voltage of 450 V

The scheme of molding the samples at the regulation voltage of 450 V

Damn.2

Damn.3. The scheme of molding the samples at the regulation voltage 30 V

The scheme of molding the samples at the regulation voltage 30 V

Damn.3


3. Cleaning of etched samples

3.1. Washing in water and nitric acid

3.1.1. After etching, the samples placed in a cell for dechlorination and place it in a tank with tap water.

After filling the cell with sample was transferred to a tank for washing with nitric acid.

3.1.2. After submersion of the cell samples in nitric acid, a stopwatch. After the appropriate flushing time (see table.2) the cell with the sample is transferred into the tank of rinsing water where tap water is.

3.2. Dechlorination and flushing deionized water

3.2.1. After washing in tap water cell with samples is placed in a bath dechlorination, where tap water is. Turn on the power supply and the stopwatch. Time after dechlorination the power source is turned off.

(Changed edition, Rev. N 1).

3.2.2. After dechlorination samples were washed in the bath, which is supplied with the deionized water.

(Added, Rev. N 2).

4. Drying

4.1. After washing, the samples are removed from the cell and placed on a filter paper. Drying is performed in air.

4.2. Annealing the solid samples etched low-voltage foil is carried out in a laboratory furnace that provides a temperature (400) °C, the annealing time — 2 hours

(Changed edition, Rev. N 2).

5. Forming and measuring the electrical characteristics

5.1. All tests carried out in rubber gloves, rinsed with demineralized water and rubbed with alcohol. Tools and devices also wipe with alcohol.

5.2. Check the specific capacity of etched foil is conducted after forming voltage of 30 V foil for low voltage capacitors and voltage of 450 In foil for high voltage capacitors.

5.2.1. Equipment, reagents, solutions

Boric acid for electrolytic capacitors.

Deionized water, obustroena, a specific resistance of not less than 1 mω·cm at 20 °C with a silica content of not more than 0.2 mg/DM.

Aqueous 25% ammonia solution, prepared by dissolving gaseous ammonia according to GOST 6221−82* in the desalinated water resistance of not less than 1 mω·cm with a silica content of not more than 1 mg/DM.
________________
* On the territory of the Russian Federation the document is not valid. Valid GOST 6221−90. — Note the manufacturer’s database.

Rectified ethyl alcohol according to GOST 5962−67.

Installation for forming etched foil for low voltage capacitors T. 037.02.

Installation for moulding foil for high voltage capacitors T. 037.01.

Setup for measuring the leakage current of the molded foil So 037.03.

Bridge for measuring the specific capacity types, CME 14АМ, RMZ-8.

The unit according to GOST 14919−76*.
________________
* On the territory of the Russian Federation the document is not valid. Valid GOST 14919−83. — Note the manufacturer’s database.

Glass of heat-resistant glass with a capacity of 0.5−1.0 DM.

5.2.2. Preparation of the bath forming

5.2.2.1. To cook in the bath of electrolyte forming samples of the required composition in accordance with the table.3.

5.2.2.2. To clean the bath by 3−4 successive molds spare samples etched foil for a voltage of 50 V in an electrolyte of 1 N and 600 N in the electrolyte 2.

5.2.2.3. To check the quality of the electrolyte in the tub moulding high-quality samples and measurement of their leakage current and the maximum voltage time of maximum voltage in accordance with clause 5.2.3.3. If these parameters match those specified in table.5, the bath is ready.

Table 3

The number of the electrolyte	The forming voltage	Characteristics of the forming electrolytes
A DMelectrolyte		The resistivity at a temperature of 70 °C, Ohm·cm	The solution temperature, °C
boric acid, g	25% solution of ammonia, cm
1	30	60	1,2	500−1000	90±2
2	450	80	0,15	2000−3000	90±2

(Changed edition, Rev. N 2).

5.2.3. Forming controlled samples

5.2.3.1. Forming at a voltage of 450 V.

Before forming the samples of the foil to expose preformance, which consists in maintaining them for 120 s in deionized water, heated to a temperature of (96±3)°C. After preformance samples placed into the bath forming device T. 037.01 and a current of 50 mA/cmto smoothly raise the voltage to 450 V. to carry out the forming in accordance with the devil. 2.

5.2.3.2. Forming at a voltage of 30 V.

Place samples in the bath forming device T. 037.02. To carry out the forming in accordance with the devil.3.

Allowed additional molding for 10 minutes.

(Changed edition, Rev. N 2).

5.2.3.3. To control the quality of the moulding.

5.2.3.3.1. To make the control electrolyte according to the table.4.

Table 4

The purpose of the electrolyte	Description of control of electrolytes
A DMelectrolyte		Specific resistance at 20 °C, Ohm·cm	The solution temperature, °C
boric acid, g	25% solution of ammonia, cm
Measurement of leakage current	70	-	-	90±3
Capacitance measurement	50	32	100	20±5

(Changed edition, Rev. N 2).

5.2.3.3.2. To clean the electrolytes by 3−4 successive samples of the moldings smooth foil at a voltage of 600 V. the Electrolyte is considered usable if the formed pattern is smooth foil of size 2x2 cm and a current of 40 mA voltage 600 achieve In less than 6 min.

5.2.3.3.3. Place the sample having undergone forming according to claim 5.2.5, in a glass device T. 037.03 with the electrolyte. A current of 4 mA for foil with 450 V or 2 mA for foil 30 to raise the voltage to the highest possible value . To mark time and achievements. Lower the voltage to 0.95 and after the 1 min mark the current value. To get the value of the leakage current resulting value is multiplied by 10.

Molding is of high quality if the characteristics of the foil meet the requirements of table.5.

(Changed edition, Rev. N 2).

Table 5

Feature foil	Voltage forming,
30	450
Maximum voltage , V, not less	30	450
The time to reach , with no more than	30	60
Leakage current, mA/DM, not more	10	15

(Changed edition, Rev. N 2).

5.2.4. Measurement of the specific capacity

5.2.4.1. Measurement of specific capacitance is held without supplying the polarizing voltage.

5.2.4.2. Measurement of the specific capacity of the samples with 450 V to Hang the molded sample in the measuring cell with electrolyte in accordance with the table.4. To withstand 2 min, to be measured. To determine the specific capacity of the obtained value is multiplied by 10.

5.2.4.3. Measurement of the specific capacity of the samples with 30 V. to Hang two samples in the measuring cell with electrolyte in accordance with the table.4, on both sides of the Central partition one against the other. To move a suspended partition, stand 2 min. to Measure capacitance. To obtain the specific capacity of the obtained value is multiplied by 20.

For measurement take a pair of samples with cropped edges: 1−2; 2−3; 3−1.

If the foil was poor quality, be re-forming.

(Changed edition, Rev. N 2).

6. Processing of the results

6.1. Check the correct operation of the equipment, materials and solutions is held at least once a week by measuring the specific capacity of a reference sample foils with a known specific capacity. The specific capacity of the reference model of the foil in the form of a roll shall be agreed with the manufacturer and parent company of consumer foil.

The measurement results are logged.

In case of discrepancy increased the specific capacity of the agreed value of the reference sample, tested equipment and solutions, and then test again.

6.2. The differences in the assessment increased the specific capacity of the samples of foil definition it is conducted at the head office of the consumer with the participation of the manufacturer and the consumer.

Sampling foil is held by the consumer in the presence of the manufacturer.

Sec. 6. (Added, Rev. N 2).