EN ISO 2143:2010

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 (ISO 2143:2010)

Publication date:   Dec 17, 2010

General information

99.60 Withdrawal effective   Nov 22, 2017


CEN/TC 132 Aluminium and aluminium alloys

European Norm

25.220.20   Surface treatment



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ISO 2143:2010 specifies a method of estimating the loss of absorptive power of anodic oxidation coatings that have undergone a sealing treatment, by dye absorption after acid pretreatment.
The method is suitable for use as a production control method and is applicable to anodic oxidation coatings which may be subjected to weathering or aggressive environments, or where resistance to staining is important.
The method is not applicable to those coatings that: a) are formed on alloys containing more than 2 % copper or 4 % silicon; b) are sealed by the dichromate process; c) have been given supplementary processing, e.g. oiling, waxing or lacquering; d) are coloured in deep shades; e) are less than 3 μm thick.
The method is less appropriate where nickel or cobalt salts, or organic additives, have been added to the sealing bath.

Life cycle


EN 12373-4:1998


EN ISO 2143:2010
99.60 Withdrawal effective
Nov 22, 2017


EN ISO 2143:2017