Processes for removing metallic material from surfaces, not provided for in group C 23 F 1/00 or C 23 F 3/00 [4]
4
/
02
•
by evaporation [4]
4
/
04
•
by physical dissolution [4]
11
/
00
Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent (adding inhibitors to mineral oils, fuels or lubricants C 10; adding inhibitors to pickling solutions
C 23 G)
11
/
02
•
in air or gases by adding vapour phase inhibitors
11
/
04
•
in markedly acid liquids
11
/
06
•
in markedly alkaline liquids
11
/
08
•
in other liquids
11
/
10
•
•
using organic inhibitors
Note
In groups C 23 F 11/12 to C 23 F 11/18, in the absence of an indication to the contrary, a compound is classified in the last appropriate place.
11
/
12
•
•
•
Oxygen-containing compounds
11
/
14
•
•
•
Nitrogen-containing compounds
11
/
16
•
•
•
Sulfur-containing compounds
11
/
167
•
•
•
Phosphorus-containing compounds [4]
11
/
173
•
•
•
Macromolecular compounds [4]
11
/
18
•
•
using inorganic inhibitors
13
/
00
Inhibiting corrosion of metals by anodic or cathodic protection
13
/
02
•
cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions [5]
13
/
04
•
•
Controlling or regulating desired parameters [5]
13
/
06
•
•
Constructional parts, or assemblies of cathodic-protection apparatus [5]
13
/
08
•
•
•
Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto [5]
13
/
10
•
•
•
•
Electrodes characterised by the structure (C 23 F 13/16 takes precedence) [5]
13
/
12
•
•
•
•
Electrodes characterised by the material (C 23 F 13/16 takes precedence) [5]
13
/
14
•
•
•
•
•
Material for sacrificial anodes [5]
13
/
16
•
•
•
•
Electrodes characterised by the combination of the structure and the material [5]
13
/
18
•
•
•
•
Means for supporting electrodes [5]
13
/
20
•
•
•
•
Conducting electric current to electrodes [5]
13
/
22
•
•
•
•
Monitoring arrangements therefor [5]
14
/
00
Inhibiting incrustation in apparatus for heating liquids for physical or chemical purposes (adding scale preventives or removers to water C 02 F 5/00
) [2]
14
/
02
•
by chemical means
15
/
00
Other methods of preventing corrosion or incrustation
17
/
00
Multi-step processes for surface treatment of metallic material involving at least one process provided for in class C 23 and at least one process covered by subclass C 21 D or C 22 F or class C 25(C 23 C 28/00 takes precedence) [4]
