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BSI BS EN 12373-4:1998

Aluminium and aluminium alloys. Anodizing -- Estimation of loss of absorptive power of anodic oxidation coatings after sealing by dye spot test with prior acid treatment
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BSI BS EN 12373-4:1998

Aluminium and aluminium alloys. Anodizing -- Estimation of loss of absorptive power of anodic oxidation coatings after sealing by dye spot test with prior acid treatment

PUBLISH DATE 2010
PAGES 12
BSI BS EN 12373-4:1998

This Part of this European Standard 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:

  1. formed on alloys containing more than 2 % copper or 4 % silicon;

  2. sealed by the dichromate process;

  3. that have been given supplementary processing, for example oiling, waxing or lacquering;

  4. that are coloured in deep shades;

  5. that 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.

Comparison with chart of coloured spots of two dyes.
SDO BSI: British Standards Institution
Document Number EN 12373-4
Publication Date April 30, 2010
Language en - English
Page Count 12
Revision Level
Supercedes
Committee STI/33
Publish Date Document Id Type View
April 15, 1999 BS EN 12373-4:1998 Revision
April 30, 2010 BS EN 12373-4:1998 Consolidated