Guest 9721-79. Powder cobalt. Technical conditions.
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The standard applies to cobalt powder made by electrolytic method and intended for the production of magnets and special products by powder metallurgy methods. Cobalt powder must be manufactured in accordance with the requirements of this standard for process regulations approved in accordance with the established procedure. Powder cobalt refers to the 2nd class of danger. Under normal conditions, it is not flammable, fire-and explosion-proof. Ignition temperature 370 ° C,.
|Powder grade||Chemical composition, %||OKP code|
|Cobalt, not less than||Impurities, no more than|
|PC-1u||99.35||0.2||0.02||0.4||0.02||0.04||17 9351 0001|
The mass fraction of moisture and oxygen in the powder should not exceed: moisture — 0.15%; oxygen — 0.3%.
The size of the powder particles should be less than 71 μm. Powder particles of more than 71 μm in size not exceeding 4% of the batch weight are allowed.
The mass fraction of powder particles of less than 45 μm should be at least 30% of the batch weight.
Bulk density of the powder is set at the request of the consumer. Buy metal powders offered by Evek GmbH. Price from the manufacturer. The supplier ensures the delivery of products to any place.
The maximum permissible concentration of cobalt powder in the air is 0.5 mg / m 3, a. the maximum permissible concentration of cobalt ions in water is 1.0 mg / dm 3. The content of cobalt in water is determined by the photometric method or by other methods that are not inferior in accuracy to the photometric method. In air and wastewater in the presence of other substances or factors, the cobalt powder of toxic derivatives does not form.
According to GOST 9721−79 cobalt powder is packed in metal cans (GOST 6128) or in polyethylene bottles with a capacity not exceeding 10 dm 3 .
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