CPC Subgroup
C23C 22/12 containing zinc cations
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 > using aqueous solutions > using aqueous acidic solutions with pH less than 6 > containing phosphates > Orthophosphates > containing zinc cations
4 direct subcodes
Child Classifications
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- C23C 22/13 containing also nitrate or nitrite anions
- C23C 22/14 containing also chlorate anions
- C23C 22/16 containing also peroxy-compounds
- C23C 22/17 containing also organic acids