|  | 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 Fulltext... Hierarchy... Expanded...D06Q 1/04); INHIBITING CORROSION OR INCRUSTATION IN GENERAL (treating metal surfaces or coating of metals by electrolysis or electrophoresis Fulltext... Hierarchy... Expanded...C25D, Fulltext... Hierarchy... Expanded...C25F) [2]

|  | C23D |
ENAMELLING OF, AND APPLYING A VITREOUS LAYER TO, METALS (chemical composition of the enamels Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...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