C23F NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE (working metal by laser beams B23K26/00; desurfacing by applying flames B23K7/00; working of metal by electro-erosion B23H; producing decorative effects by removing surface material, e.g. by engraving, by etching, B44C1/22; electrolytic etching or polishing C25F); INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
Description
C23F covers chemical and electrochemical methods for removing metallic material from surfaces without mechanical action, such as pickling, etching, and electropolishing processes. The subclass also encompasses corrosion inhibition techniques using chemical treatments, coatings, or inhibitor compounds, and methods for preventing incrustation (scale formation) on metallic and non-metallic surfaces. Additionally, C23F includes multi-step surface treatment processes that combine techniques from class C23 with those from adjacent subclasses or classes, such as combining chemical cleaning with subsequent coating or diffusion treatments. This classification excludes purely mechanical removal methods, which fall under different technical fields.
10 direct subcodes
Child Classifications
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- C23F 1/00 Etching metallic material by chemical means (manufacture of printing surfaces B41C; manufacture of printed circuits H05K)
- C23F 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 oil, fuels, or lubricants C10; adding inhibitors to pickling solutions C23G)
- C23F 13/00 Inhibiting corrosion of metals by anodic or cathodic protection
- C23F 14/00 Inhibiting incrustation in apparatus for heating liquids for physical or chemical purposes (adding scale preventives or removers to water C02F5/00 )
- C23F 15/00 Other methods of preventing corrosion or incrustation
- C23F 17/00 Multi-step processes for surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by subclass C21D or C22F or class C25 (coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups C23C2/00 - C23C26/00, or by combinations of methods providedfor in subclasses C23C and C25D, C23C28/00)
- C23F 2201/00 Type of materials to be protected by cathodic protection
- C23F 2213/00 Aspects of inhibiting corrosion of metals by anodic or cathodic protection
- C23F 3/00 Brightening metals by chemical means
- C23F 4/00 Processes for removing metallic material from surfaces, not provided for in group C23F1/00 or C23F3/00