C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
148/20
C23C 22/04 (2006.01) C23C 22/83 (2006.01)
Patent
CA 1257182
Abstract of the Disclosure In the process of chromate treatment, a metallic material which has been immersed in a chromate treatment solution is allowed to stand in an atmosphere substantially free from any ingredient of the chromate treatment solution for at least 30 seconds and then washed with a halocarbon or a mixture of a halocarbon and an alcohol the chromate treatment solution before drying, By the procedure chromium is evenly and uniformly taken up on the surface of the metallic material and the amount of chromium taken up on the surface can be controlled by conditions of standing in said atmosphere.
508740
Ayukawa Nobuhiro
Konishi Yasuhiko
Nippon Dacro Shamrock Co. Ltd.
Riches Mckenzie & Herbert Llp
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