using aqueous acidic solutions with pH less than 6

Introduced: January 1985

Title

Titles differ between systems:

IPC: using aqueous acidic solutions with pH < 6

CPC: using aqueous acidic solutions with pH less than 6

Full Title

Full titles differ between systems:

IPC:

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 < 6

CPC:

IPC and CPC are identically structured here. All 6 subcodes exist in both systems.

IPC defines codes here since 1985.

Child Classifications

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C23C 22/07 containing phosphates since 1985 IPC+CPC Available in IPC and CPC
C23C 22/24 containing hexavalent chromium compounds since 1985 IPC+CPC Available in IPC and CPC
C23C 22/34 containing fluorides or complex fluorides since 1985 IPC+CPC Available in IPC and CPC
C23C 22/40 containing molybdates, tungstates or vanadates since 1985 IPC+CPC Available in IPC and CPC
C23C 22/46 containing oxalates since 1985 IPC+CPC Available in IPC and CPC
C23C 22/48 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates since 1985 IPC+CPC Available in IPC and CPC