PD ISO/TR 16689:2012 PDF

Anodizing of aluminium and its alloys. Experimental research on possible alternative sealing quality test methods to replace the phosphoric acid/chromic acid immersion test. Evaluation of correlations

Название (английский):

PD ISO/TR 16689:2012

Статус документа:: Действующий
Формат:: Электронный (PDF)
Дата публикации:: 31 июля 2012 г.
ICS:: 25.220.20
SKU:: PD ISO/TR 16689:2012

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Abstract

1 Scope This Technical Report contains data from an evaluation of candidates to replace the chromic/phosphoric acid solution (CPA) test for the quality of sealing of anodic oxidation coatings on aluminium. Following a review by Qualanod (see Working Group report in Annex A), it was agreed with Sapa Technology that the candidate tests for evaluation would be as follows:

— acetic acid/sodium acetate solution (AASA) test as described in ISO 2932 [10] , a method used in the 1970s;

— sulfuric acid solution (SA) test as described by Manhart and Cochran [9] .

The evaluation consists of a comparison of the candidates with the CPA (EN 12373-6 [3] ), dye absorption (EN 12373-4 [12] ) and admittance tests (EN 12373-5 [13] ) using four different sealing methods:

— hot-water sealing;

— cold sealing;

— medium-temperature (midtemp) sealing using a nickel-containing solution;

— midtemp sealing using a nickel-free solution.

An immersion test based on the CPA test, but without the inclusion of chromic acid, was excluded due to the simi...

PD ISO/TR 16689:2012 PDF

Abstract

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Abstract

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