GOST 12797-77
GOST 12797−77 Gallium technical. Specifications (with Amendments No. 1, 2)
GOST 12797−77*
Group W51
INTERSTATE STANDARD
GALLIUM TECHNICAL
Specifications
Gallium technical. Technical requirements
GST 17 6832
Date of introduction 1979−01−01
The decision of the State standards Committee of the Council of Ministers of the USSR from
Limitation of actions taken by Protocol No. 3−93 Interstate Council for standardization, Metrology and certification (ICS 5−6-93)
REPLACE GOST 12797−67
* Edition with Amendments No. 1, 2 approved in may 1983, June 1988 (IUS 9−83, 9−88)
This standard applies to technical gallium used as a starting raw material for producing high-purity gallium and other purposes.
(Changed edition, Rev. N 2).
1. TECHNICAL REQUIREMENTS
1.1. Technical gallium manufactured in accordance with the requirements of this standard for technological regulations approved in the prescribed manner.
(Added, Rev. N 1).
1.1. Technical gallium is produced in two grades: GL-0 and GL-1 in accordance with the requirements of this standard with the chemical composition given in table.1.
Table 1
| Chemical composition, % | |||||||||
| Mark Gallia | Gallium, at least | Impurity, not more than | |||||||
| Aluminium |
Iron | Silicon | Magnesium | Copper | Nickel | Zinc | Lead | ||
| GL-0 |
99,99 | 3·10 |
3·10 |
5·10 |
3·10 |
2·10 |
1·10 |
1·10 |
6·10 |
| GL-1 |
99,9 | 1·10 |
1·10 |
1·10 |
1·10 |
3·10 |
1·10 |
1·10 |
6·10 |
Note. Mass fraction of gallium is defined conventionally as the difference between 100% and the sum of controlled admixtures.
(Changed edition, Rev. N 1).
1.2. Gallium is produced in the form of ingots of cylindrical shape. Bar weight and OKP codes shall be as specified in table.2.
Table 2
| Mark |
Weight of ingot, g | OKP code |
| GL-0 |
From 200 to 400 incl. | 17 6832 0101 00 |
| SV. 400 «500 « | 17 6832 0102 10 | |
| 900 «1000 « | 17 6832 0103 09 | |
| SV. 1000 «1500 « | 17 6832 0104 08 | |
| 1500 «5000 « | 17 6832 0105 07 | |
| GL-1 | From 200 to 400 incl. |
17 6832 0201 08 |
| SV. 400 «500 « | 17 6832 0202 07 | |
| 900 «1000 « | 17 6832 0203 06 | |
| SV. 1000 «1500 « | 17 6832 0204 05 | |
| 1500 «5000 « | 17 6832 0205 04 |
Note. Gallium weight up to 5000 g produce on demand of the consumer.
(Changed edition, Rev. N 1, 2).
1.3. In Gaul are not allowed slag and other foreign matter. The gallium surface should have a metallic luster.
1A. SAFETY REQUIREMENTS
1a.1. Maximum permissible concentration (MPC) of gallium oxide in the workplace air is 3 mg/m, hazard class according to GOST 12.1.007−76 — 3.
1A.2. Gallium and its compounds affect the nervous system, gastrointestinal tract, parenchymatous organs and mineral metabolism.
1A.3. The melting point of gallium 29,76 °C, the boiling point of 2205 °C. Gallium pozharovzryvobezopasnost.
1A.4. Control over the content of gallium in the air of working zone is carried out in accordance with GOST 12.1.005−88.
1A.5. Production premises should be equipped with General dilution ventilation system in accordance with GOST 12.4.021−75.
The place of unloading, packaging, packing, sampling should be equipped with local exhaust ventilation.
1A.6. Chemical analyses performed in a fume hood in accordance with the normative-technical documentation.
Sec. 1A. (Added, Rev. N 2).
2. ACCEPTANCE RULES
2.1. Gallium accept parties. The party should consist of metal, resulting from one of the dosed bottling and crystallization in a vacuum and be accompanied by a document about quality that contains:
trademark or the name and trademark of manufacturer;
product name and code for GST;
batch number;
the net weight of the batch;
number of bars in the party;
the results of the analysis;
the date of manufacture;
stamp of technical control Department.
(Changed edition, Rev. N 1, 2).
2.2. To check the chemical composition of the selected one bar from the party. Allowed the manufacturer to determine the chemical composition to carry out the sampling of liquid metal.
2.3. Quality control of gallium on the line PP.1.2 and 1.3 are subjected to every ingot.
2.4. If unsatisfactory validation results of the chemical composition of a second check on the same sample.
The results of repeated checks apply to the entire party.
2.2−2.4. (Changed edition, Rev. N 1).
3. TEST METHODS
3.1. To check the chemical composition sampling is performed on randomly selected sections of the dispensing device while dispensing metal. Samples are taken in the same conditions, which produce a metered flow and crystallization. For gallium brand GL-1 allowed sampling of the entire mass of liquid metal PTFE sampler for flood of metal. During the flood of metal from each party select two samples.
The weight of one sample should be not less than 10 g.
Each sample was placed in double bags, made from polyethylene film according to GOST 10354−82. The packages are sealed.
Before the production of packages for gallium brand GL-0 film is wiped with a gauze pad according to GOST 11109−90 with ethyl alcohol according to GOST 5962−67*.
________________
* On the territory of the Russian Federation GOST R 51652−2000. Here and hereinafter. — Note the manufacturer’s database.
Between the layers of the package, put the label that indicates the date of sampling, batch number, stamp of the technical control, or a personal stamp.
One sample transfer for analysis, the second stored at the factory for six months.
(Changed edition, Rev. N 1).
3.2. (Deleted, Rev. N 1).
3.3. Analysis of gallium is carried out according to GOST 13637.0−93 — GOST 13637.9−93.
On the manufacturer is allowed to conduct analyses by other methods, accuracy is not inferior to the specified standards.
3.4. The weight of ingots of gallium is carried out according to normative-technical documentation (NTD).
3.5. The surface quality is checked visually without the use of magnifying devices.
3.4, 3.5. (Added, Rev. N 1).
4. PACKING, MARKING, TRANSPORTATION AND STORAGE
4.1. Each ingot of gallium is Packed in a plastic bag. Bars one party put in a double plastic bag. Packaging bags sealed.
Violation of the package is not allowed.
The package prepared from a polyethylene film according to GOST 10354−82. Before the production of packages for packaging metal brand GL-0 film is rubbed with ethyl alcohol according to GOST 5962−67.
Between the layers of the package put the packing list in which you specify:
the name and brand of metal;
batch number;
number of bars in a package.
a lot of packages in kilograms;
the date of packaging;
the name of the packer.
(Changed edition, Rev. N 2).
4.2. Ingots of gallium, Packed in a plastic bag, wrapped in tracing paper for technical documentation and is placed in a wooden box according to GOST 2991−85 type I or II-1, II-2. Boxes inside spread cotton wool on NTD.
The gross mass of the box should be no more than 20 kg.
In the box packaged bars of only one party.
(Changed edition, Rev. N 1).
4.3. The ends of the box around the wire. Trim one end of the box ends with seal attached to the lid of the box.
4.4. Transport marking under GOST 14192−96 with application of manipulation sign «Protect from heat».
In addition, the marking containing the following information:
the name or code of the products;
batch number.
During long-term storage on the box further cause the date of manufacture and the designation of this standard.
Labeling boxes when sending postal parcels must comply with the rules, approved in the prescribed manner.
(Changed edition, Rev. N 1).
4.5. (Deleted, Rev. N 1).
4.6. Gallium sending postal parcels.
When the weight of the batch is more than 20 kg are allowed to send by rail, road or air transport, in covered transport facilities in accordance with cargo carriage regulations applicable to transport of this species.
The gross weight of one box should be no more than 10 lbs. On the lid of the box applied labels in accordance with the requirements of the post office.
(Changed edition, Rev. N 1, 2).
4.7. Gallium should be stored indoors in the original container at temperature not exceeding 25 °C.
