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PCE
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DIFF Subgroup
C23C 22/73

characterised by the process

Introduced: January 1985

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 > characterised by the process

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

IPC defines codes here since 1985.

Child Classifications

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  • C23C 22/74 for obtaining burned-in conversion coatings since 1985 IPC+CPC Available in IPC and CPC
  • C23C 22/76 Applying the liquid by spraying since 1985 IPC+CPC Available in IPC and CPC
  • C23C 22/77 Controlling or regulating of the coating process since 1985 IPC+CPC Available in IPC and CPC