Surface treatment
Protective coatings
Anodic coating
Acid-resistance tests
Stain tests
Acids
Dyes
Anodizing
Coatings
Electrodeposition
Oxidation methods
Visual inspection (testing)
Absorption
Aluminium
Sealing (anodized coatings)
Aluminium alloys
Chemical analysis and testing
Link: BS EN ISO 2143:2017 Anodizing of aluminium and its alloys. Estimation of loss of absorptive power of anodic oxidation coatings after sealing. Dye-spot test with prior acid treatment
Source: BSI Standards
