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PCE
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CPC Subgroup
C23C 22/40

containing molybdates, tungstates or vanadates

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 molybdates, tungstates or vanadates

3 direct subcodes

Child Classifications

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  • C23C 22/42 containing also phosphates
  • C23C 22/43 containing also hexavalent chromium compounds
  • C23C 22/44 containing also fluorides or complex fluorides