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PCE
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DIFF Subgroup
C23C 22/60

using alkaline aqueous solutions with pH greater than 8

Introduced: January 1985

Title

Titles differ between systems:

IPC: using alkaline aqueous solutions with pH > 8

CPC: using alkaline aqueous solutions with pH greater than 8

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 alkaline aqueous solutions with pH > 8

CPC:

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 alkaline aqueous solutions with pH greater than 8

IPC and CPC are identically structured here. All 4 subcodes exist in both systems.

IPC defines codes here since 1985.

Child Classifications

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  • C23C 22/62 Treatment of iron or alloys based thereon since 1985 IPC+CPC Available in IPC and CPC
  • C23C 22/63 Treatment of copper or alloys based thereon since 1985 IPC+CPC Available in IPC and CPC
  • C23C 22/64 Treatment of refractory metals or alloys based thereon since 1985 IPC+CPC Available in IPC and CPC