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]
 C23D
ENAMELLING OF, AND APPLYING A VITREOUS LAYER TO, METALS (chemical composition of the enamels C03C)
 C23D 1/00
Melting or fritting the enamels; Apparatus and furnaces therefor
 C23D 1/02
·  Granulating the melt; Drying the granules
 C23D 3/00 - 
C23D 7/00
Coating with the enamels
 C23D 3/00
Chemical treatment of the metal surfaces prior to coating (cleaning and de-greasing of metallic objects C23G)
 C23D 5/00
Coating with enamels or vitreous layers including applying fused refractory layers
 C23D 5/02
·  by wet methods
 C23D 5/04
·  by dry methods
 C23D 5/06
·  producing designs or letters
 C23D 5/08
·  Applying enamels non-uniformly over the surface
 C23D 5/10
·  with refractory materials
 C23D 7/00
Treating the coatings, e.g. drying before burning
 C23D 9/00 - 
C23D 11/00
Firing the enamels
 C23D 9/00
Ovens specially adapted for firing enamels
 C23D 9/02
·  Non-electric muffle furnaces
 C23D 9/04
·  Non-electric tunnel ovens
 C23D 9/06
·  Electric furnaces
 C23D 9/08
·  Supporting devices for burning-bars
 C23D 9/10
·  Loading or unloading devices
 C23D 11/00
Continuous processes; Apparatus therefor
 C23D 13/00 - 
C23D 17/00
After-treatment
 C23D 13/00
After-treatment of the enamelled articles
 C23D 13/02
·  Removing defects by local re-melting of the enamel; Adjusting the shape
 C23D 15/00
Joining enamelled articles to other enamelled articles by processes involving an enamelling step
 C23D 17/00
De-enamelling