CPC Subgroup
C23C 22/82 After-treatment
Full Title
Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals > After-treatment
2 direct subcodes
Child Classifications
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- C23C 22/83 Chemical after-treatment
- C23C 22/84 Dyeing