ISO 2931:2017

Anodizing of aluminium and its alloys — Assessment of quality of sealed anodic oxidation coatings by measurement of admittance

Publication date:   Dec 4, 2017

General information

90.93 Standard confirmed   Nov 2, 2023

ISO

ISO/TC 79/SC 2 Organic and anodic oxidation coatings on aluminium

International Standard

25.220.20   Surface treatment

Buying

  Published

PDF - €50.82

  English   French  



Buy

Scope

ISO 2931:2017 specifies a method for assessing the quality of sealed anodic oxidation coatings on aluminium and its alloys by measurement of the admittance.
The method is applicable to anodic oxidation coatings sealed in an aqueous medium.
NOTE 1 Results obtained from anodic oxidation coatings sealed by different methods, e.g. hydrothermal sealing and cold sealing, are not necessarily comparable.
NOTE 2 Results obtained from anodic oxidation coatings on alloys containing more than 2 % silicon or 5 % manganese or 3 % magnesium are not comparable with results obtained from anodic oxidation coatings on more dilute alloys.
The method is suitable for use as a production-control test and as an acceptance test where there is agreement between the anodizer and the customer.
Any type of anodized component can be tested by the method described, provided that there is a sufficient area (a circle of diameter about 20 mm) and that the film thickness is greater than 3 µm.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 2931:2010

NOW

PUBLISHED
ISO 2931:2017
90.93 Standard confirmed
Nov 2, 2023