GB/T467-1997 Anode Copper
This standard specifies the requirements and methods of test for anode copper manufactured by electrorefining process.
Anode copper is used in various products and materials including motor windings and bus bars, conductors and cables, electrical connectors, etc.
This standard is applicable to anode copper primarily manufactured with a purity of 99.9% to 100%.
The anode copper is divided into Grades A and B in this standard. Grade A is for intermediate grade and is used for general purpose activities and components. Grade B is for high grade and is intended for special applications like commutator and rotor winding, electrical connectors, etc.
Anode copper Grades A and B are examined by several tests, including physical and chemical tests.
Physical Tests
The physical tests for anode copper include (1) surface inspection and (2) measurement of dimension (length, width, and thickness).
Chemical Tests
The chemical tests for both grades of anode copper include (1) an acid and alkaline surface treatment, (2) an acid immersion, (3) a surface scooping, and (4) an electrochemical resistance test.
An acid and alkaline surface treatment is done to determine the compatibility with general acid and alkaline solution by putting a part of anode copper into each solution and checking the reaction. An acid immersion test is done to examine the solution of an anode copper with an artificial acid solution. A surface scooping test is done to assess the performance of the anode copper against scratches and aggressive materials. Finally, an electrochemical resistance test is done to measure the corrosion resistance of the anode copper against certain types of corrosive environment.
Conclusion
GB/T467-1997 specifies the requirements and methods of test for anode copper manufactured by electrorefining process. Anode copper is divided into Grades A and B with the primary purity of 99.9% to 100%. The physical tests are surface inspection and measurement of dimension. Chemical tests include an acid and alkaline surface treatment, an acid immersion, a surface scooping, and an electrochemical resistance test.
