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 D06Q 1/04); INHIBITING CORROSION OR INCRUSTATION IN GENERAL
 C23G
CLEANING AND DE-GREASING OF METALLIC OBJECTS BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS (polishing compositions C09G; detergents in general C11D)
 C23G 1/00
Cleaning or pickling metals with solutions or molten salts (with organic solvents C23G 5/02)
 C23G 1/02
·  with acid solutions
 C23G 1/04
·  ·  using inhibitors
 C23G 1/06
·  ·  ·  organic inhibitors
 C23G 1/08
·  ·  iron or steel
 C23G 1/10
·  ·  other heavy metals
 C23G 1/12
·  ·  light metals
 C23G 1/14
·  with alkaline solutions
 C23G 1/16
·  ·  using inhibitors
 C23G 1/18
·  ·  ·  organic inhibitors
 C23G 1/20
·  ·  heavy metals
 C23G 1/22
·  ·  light metals
 C23G 1/24
·  with neutral solutions
 C23G 1/26
·  ·  using inhibitors
 C23G 1/28
·  with molten salts
 C23G 1/30
·  ·  using inhibitors
 C23G 1/32
·  ·  heavy metals
 C23G 1/34
·  ·  light metals
 C23G 1/36
·  Regeneration of waste pickling liquors
 C23G 3/00
Apparatus for cleaning or pickling metals (apparatus for continuously conveying articles into baths B65G)
 C23G 3/02
·  for cleaning wires, strips, filaments continuously
 C23G 3/04
·  for cleaning pipes
 C23G 5/00
Cleaning or de-greasing metals by other methods
 C23G 5/02
·  using organic solvents
 C23G 5/04
·  ·  Apparatus