C
SECTION C — CHEMISTRY AND METALLURGY
 C

Note(s)

Definitions for Section C:

  • Alkali metals: Li, Na, K, Rb, Cs, Fr
  • Alkaline earth metals: Ca, Sr, Ba, Ra
  • Lanthanides: elements with atomic numbers 57 to 71 inclusive
  • Rare earths: Sc, Y, Lanthanides
  • Actinides: elements with atomic numbers 89 to 103 inclusive
  • Refractory metals: Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W
  • Halogens: F, Cl, Br, I, At
  • Noble gases: He, Ne, Ar, Kr, Xe, Rn
  • Platinum group: Os, Ir, Pt, Ru, Rh, Pd
  • Noble metals: Ag, Au, Platinum group
  • Light metals: alkali metals, alkaline earth metals, Be, Al, Mg
  • Heavy metals: metals other than light metals
  • Iron group: Fe, Co, Ni
  • Non-metals: H, B, C, Si, N, P, O, S, Se, Te, noble gases, halogens
  • Metals: elements other than non-metals
  • Transition elements: elements with atomic numbers 21 to 30 inclusive, 39 to 48 inclusive, 57 to 80 inclusive, 89 upwards

  
METALLURGY
 C23
WORKING OR TREATMENT OF METALS, OTHER THAN BY MECHANICAL MEANS; COVERING MATERIALS WITH METALS (decorating textiles by metallising D06Q 1/04); INHIBITING CORROSION OR INCRUSTATION IN GENERAL (treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D, C25F)  [2]
 C23C
APPARATUS AND PROCESSES FOR WHICH PROVISION IS NOT MADE ELSEWHERE, e.g. IN CLASSES B05, B44 OR IN SUB-CLASSES C03C, C23D, C23F, C25D, F27B, FOR COVERING METALS OR COVERING OTHER MATERIALS WITH METALS; DIFFUSION PROCESSES FOR SURFACE TREATMENT OF METALS
 C23C 1/00
Covering by treatment with liquid metal, e.g. hot dipping processes (metal spraying C23C 7/00)
 C23C 1/02
·  Covering with zinc or cadmium or alloys thereof
 C23C 1/04
·  Covering with tin or alloys thereof
 C23C 1/06
·  Covering with lead or alloys thereof
 C23C 1/08
·  Covering with aluminium or alloys thereof
 C23C 1/10
·  Covering with other metals or alloys
 C23C 1/12
·  Fluxes or coverings for molten metal baths
 C23C 1/14
·  Apparatus (furnaces F27)
 C23C 1/16
·  Rubbing the surface with the molten metal
 C23C 3/00
Covering with metals by treatment with solutions or suspensions of metal compounds
 C23C 3/02
·  in the presence of reducing agents
 C23C 3/04
·  followed by thermal decomposition of the metal compound
 C23C 5/00
Cladding (mechanical part in the appropriate metal-working classes, e.g. B23K 20/00)
 C23C 7/00
Metal spraying (apparatus B05B, processes B05D)
 C23C 9/00
Cementation by diffusion processes using solids or liquids
 C23C 9/02
·  Box coating with metals, i.e. heating the workpiece in metal dust
 C23C 9/04
·  Box coating with substances other than metals
 C23C 9/06
·  Box carburising
 C23C 9/08
·  ·  of iron
 C23C 9/10
·  Cementation by hot dipping in molten salts, e.g. carburising, nitriding, carbo-nitriding
 C23C 9/12
·  ·  Carburising iron
 C23C 9/14
·  ·  Nitriding iron
 C23C 9/16
·  ·  Carbo-nitriding iron
 C23C 11/00
Gas plating by thermal decomposition or reduction of gases on heated surfaces or by glow or arc discharge followed by diffusion into the surfaces
 C23C 11/02
·  to form metal coatings, e.g. by carbonyl processes
 C23C 11/04
·  ·  Chromising
 C23C 11/06
·  ·  Siliconising
 C23C 11/08
·  to form coatings of inorganic compounds of metals
 C23C 11/10
·  Gas carburising
 C23C 11/12
·  ·  of iron
 C23C 11/14
·  Gas nitriding; Gas carbo-nitriding
 C23C 11/16
·  ·  Nitriding iron
 C23C 11/18
·  ·  Carbo-nitriding iron
 C23C 13/00
Forming coatings on metals by condensation of vapours, e.g. in vacuo; Forming coatings on materials by condensation of metal vapours
 C23C 13/02
·  coatings of metals
 C23C 13/04
·  coatings of materials other than metals
 C23C 13/06
·  Making contoured surfaces, e.g. shadow casting
 C23C 13/08
·  Apparatus (furnaces F27)
 C23C 13/10
·  ·  for continuous working
 C23C 13/12
·  ·  Vapour sources, e.g. filament heaters, crucibles, electron bombardment heating apparatus (for gettering in electric discharge tubes H01J 7/18)
 C23C 15/00
Cathodic sputtering; Apparatus therefor (electric discharge tubes therefor H01J 37/34, H01J 37/36)
 C23C 17/00
Methods not covered elsewhere for coating materials with metals
 C23C 17/02
·  by reducing non-metallic coatings to metal