GOST 12338-81
GOST 12338−81 Iridium powder. Specifications (with Amendments No. 1, 2)
GOST 12338−81
Group 56
STATE STANDARD OF THE USSR
IRIDIUM POWDER
Specifications
Iridium in powder. Specifications
GST 17 9460
Date of introduction 1983−01−01
INFORMATION DATA
1. DEVELOPED AND INTRODUCED by the Ministry of nonferrous metallurgy of the USSR
DEVELOPERS
V. E. Avramov, PhD. tech. Sciences; M. A. Gavrilov; I.e., Konnova, L. A. Stepanova
2. APPROVED AND put INTO EFFECT by Decision of the USSR State Committee for standards from
3. REPLACE GOST 12338−66
The frequency of inspection — 5 years
4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS
| The designation of the reference document referenced |
Item number |
| GOST 5556−81 |
5.4 |
| GOST 6613−86 |
4.2 |
| GOST 10354−82 |
5.4 |
| GOST 12223.0−76 |
4.3 |
| GOST 12223.1−76 |
4.3 |
| GOST 12923−82 |
5.4 |
5. The expiration time limit is removed by the Resolution of Gosstandart from
6. The re-release (March 1997) with Amendments No. 1, 2 approved in June 1987, September 1992 (IUS 9−87, 12−92)
This standard covers refined iridium powder, intended for the manufacture of alloys, industrial products and other purposes, and establishes requirements for affilirovannomu iridium powder, manufactured for the needs of the national economy and exports.
1. BRAND
1.1. Depending on the chemical composition of refined iridium powder is manufactured in the following grades: IA-0, IA-1, IA-2. A — refined.
Example of symbols of refined iridium powder:
IA-0 GOST 12338−81
2. TECHNICAL REQUIREMENTS
2.1. Refined iridium powder must be manufactured in accordance with the requirements of this standard for technological regulations approved in the prescribed manner.
2.2. Chemical composition of iridium powder should conform to the standards specified in the table.
| Item |
Chemical composition, % | ||
| Grade IA-0 |
Grade IA-1 | Grade IA-2 | |
| GST 17 9461 3000 |
GST 17 9461 1000 02 | GST 17 9461 2000 09 | |
| Iridium, at least |
99,98 | 99,95 | 99,90 |
| Impurity, not more than: |
|||
| platinum, palladium, iridium, ruthenium, osmium (amount) |
0,010 | 0,020 | 0,045 |
| Gold |
0,002 | 0,002 | 0,002 |
| Lead |
0,004 | 0,005 | 0,010 |
| Iron |
0,005 | 0,010 | 0,010 |
| Silicon |
0,002 | 0,002 | 0,005 |
| Barium |
0,002 | 0,002 | 0,005 |
| Magnesium |
0,001 | 0,001 | 0,003 |
| Aluminium |
0,004 | 0,005 | 0,005 |
| Silver |
0,002 | 0,002 | 0,005 |
| Nickel |
0,001 | 0,002 | 0,005 |
| Copper |
0,003 | 0,005 | 0,010 |
| Tin |
0,002 | 0,002 | 0,002 |
| Titan |
0,002 | 0,005 | 0,010 |
| The loss on ignition |
0,010 | 0,010 | 0,010 |
Note. By agreement between the manufacturer and the customer allowed the expansion of the number of designated items not listed in this table, and the establishment of maximum contents were determined according to the method of the manufacturer.
(Changed edition, Rev. N 2).
2.3. Refined iridium is manufactured in powder form. The particle size of the powder should not exceed 0,8 mm.
Presence of powder particles larger than 0.8 mm and not more than 2% by weight of the party.
2.4. Powder of refined iridium should not contain extraneous mechanical impurities.
3. ACCEPTANCE RULES
3.1. Refined iridium powder take parties. Each batch should consist of a powder of the same brand, issued a document on quality and specification.
3.1.1. The document about quality should contain:
trademark or a trademark and the name of the manufacturer;
the name of the metal and its brand;
batch number;
mass fraction of iridium, %;
mass fraction determined by the impurity, %;
room specifications;
the date of issue;
the OTK stamp;
the designation of this standard.
The weight of the batch shall not exceed 250 kg.
(Changed edition, Rev. N 1, 2).
3.1.2. Specification must contain:
trademark or a trademark and the name of the manufacturer;
the name of the metal and its brand;
room specifications;
batch number;
the date of issue;
the number of seats;
rooms cans;
the mass of metal in each jar, g;
mass fraction of iridium, %;
mass fraction of each determined by the impurity, %;
total weight of batch, g;
the designation of this standard.
(Changed edition, Rev. N 1).
3.2. To check the quality of powder with the requirements of this standard from each lot of powder is sampled weight from 3 to 5% of the batch weight.
3.3. If unsatisfactory test results of at least one of the indicators it is carried out re-testing at twice the sample taken from the same batch of powder. The results of repeated tests apply to the entire party.
4. TEST METHODS
4.1. To determine the chemical composition and particle size of the powder of iridium sampled, which batch of powder was stirred six times on the ring and cone and reduce kvantovanie to the sample weight of 5% by weight of the party.
Allowed to acquire a sample by the method of intersection of the jet while stirring the batch of powder using a mechanical mixer.
4.2. The particle size determined by sieving the sample through a sieve with mesh No. 08 according to GOST 6613.
The sieve residue should be not more than 2%.
4.3. For analysis of the chemical composition of a sample crushed to particle size of not more than 0,315 mm, stirred and kvantovanie to reduce a mass of at least 50 g. the Sample is stored for at least three months.
Analysis of the chemical composition of refined iridium is carried out according to GOST 12223.0, GOST 12223.1.
4.4. Mechanical impurities in the sample is determined visually.
4.5. Weighing of refined iridium powder is carried out according to normative-technical documentation.
5. PACKING, MARKING, TRANSPORTATION AND STORAGE
5.1. Refined iridium powder is Packed in plastic jars and glass vials.
Net weight of powder in plastic banks should be not more than 7000 g, and the glass ampoules is not more than 50 g.
Cap and tube cans tied with string or fastened by other means and sealed with the seal of the shop of the manufacturer and the technical control Department of the manufacturer. Glass ampoules are sealed.
5.2. On each jar and label where you indicate:
the name of the metal and its brand;
room specifications;
batch number;
room banks;
mass fraction of perchloroethylene, %;
weight gross, net and tare, g;
year of issue;
the designation of this standard.
5.3. On each vial label where you indicate:
the name of the metal and its brand;
batch number;
the net mass, g;
mass fraction of perchloroethylene, %;
year of issue;
the designation of this standard.
5.2, 5.3. (Changed edition, Rev. N 1).
5.4. Each plastic jar of powder is placed in a tight cloth bag made of synthetic fiber or polyethylene film according to GOST 10354.
Glass vials with powder wrapping up soft padding; cotton wool GOST 5556 or aligning according to GOST 12923, or foam and packaged in rigid containers according to normative-technical documentation.
5.5. Bags with plastic banks and sealed in solid containers Packed in wooden boxes, pasted inside the foam or the soft cloth of synthetic fiber, or in containers according to normative-technical documentation.
Each box or container sealed with the seals of the shop of the manufacturer and the technical control Department of the manufacturer.
The seals on the boxes shall be hung through holes through a bolt after the nut is wrapped and tucked away in a recess on the lid of the box. Containers sealed cover locking slots.
5.6. On each box or container and label where you indicate:
room specifications;
the room and the location.
(Changed edition, Rev. N 1).
5.7. Storage and transportation of refined iridium powder is carried out in accordance with the requirements of the instructions of the Committee on precious metals and precious stones under the Ministry of economy and Finance.
(Changed edition, Rev. N 2).
