The use of the copper sulphate test is limited to oxide coatings having a thickness less than 5 m. This test enables a rapid check. It makes it possible to verify whether a fault on the surface of the coating corresponds to a local gap in the coating (i.e. revealing bare metal).
ISO 2085:1976 history
2018ISO 2085:2018 Anodizing of aluminium and its alloys - Check for continuity of thin anodic oxidation coatings - Copper sulfate test
2010ISO 2085:2010 Anodizing of aluminium and its alloys - Check for continuity of thin anodic oxidation coatings - Copper sulfate test
1976ISO 2085:1976 Anodizing of aluminium and its alloys; Check of continuity of thin anodic oxide coatings; Copper sulphate test