|  | C |
SECTION C — CHEMISTRY AND METALLURGY

METALLURGY

|  | C23 |
WORKING AND 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

|  | C23B |
ELECTROLYTIC SURFACE TREATMENT OF OR WITH METALS, e.g. ELECTROPLATING (Electrolytic processes or apparatus in general Fulltext... Hierarchy... Expanded...B01K); ELECTROLIFORMING; COATING METALS BY ELECTROPHORESIS

|  | C23C |
APPARATUS AND PROCESSES FOR WHICH PROVISION IS NOT MADE ELSEWHERE, e.g. IN CLASSES Fulltext... Hierarchy... Expanded...B05, Fulltext... Hierarchy... Expanded...B44, Fulltext... Hierarchy... Expanded...C03C, Fulltext... Hierarchy... Expanded...C08, OR IN Fulltext... Hierarchy... Expanded...C23B, Fulltext... Hierarchy... Expanded...C23D, Fulltext... Hierarchy... Expanded...C23F, Fulltext... Hierarchy... Expanded...F27B, FOR COVERING METALS OR COVERING MATERIALS WITH METALS; DIFFUSION PROCESSES FOR SURFACE TREATMENT OF METALS

|  | C23D |
ENAMELLING OF, AND APPLYING A VITREOUS LAYER TO, METALS (chemical composition of the enamels Fulltext... Hierarchy... Expanded...C03C)

|  | C23F |
CHEMICAL SURFACE TREATMENT OF METALS NOT COVERED BY Fulltext... Hierarchy... Expanded...C23B OR Fulltext... Hierarchy... Expanded...C23D; INHIBITING CORROSION OR INCRUSTATION IN GENERAL

|  | C23F |
Note(s) This sub-class is the general place for inhibiting corrosion or incrustation in general, whether of or on metallic or non-metallic surfaces. It does not include, however; protective layers or coating compositions or methods of applying them; these are classified in the relevant class, e.g. Fulltext... Hierarchy... Expanded...B05, Fulltext... Hierarchy... Expanded...B44, Fulltext... Hierarchy... Expanded...C09D. mechanical devices or constructional features of particular articles; these are classified in the relevant class, e.g. pipes, pipe fittings Fulltext... Hierarchy... Expanded...F16L. articles characterised by being made of materials selected for their properties of resistance to corrosion or incrustation; these are classified in the relevant class, e.g. turbine blades Fulltext... Hierarchy... Expanded...F01D 5/28.

|  | C23G |
CLEANING AND DE-GREASING OF METALLIC OBJECTS BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS (polishing compositions Fulltext... Hierarchy... Expanded...C09G; detergents in general Fulltext... Hierarchy... Expanded...C11D)