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AS 2331.3.9-2001
[Current]Methods of test for metallic and related coatings, Method 3.9: Corrosion and related property tests — Metallic coatings — Porosity tests — Ferroxyl test
This Standard specifies a method of revealing pores or other discontinuities in metallic coatings that are not visibly affected by ferricyanide and chloride ions during the test period and that are cathodic to iron and steel. This method is especially useful for thick, hard chromium coatings used for wear resistance.
Published: 23/11/2001
Pages: 4
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
1 Scope
2 Referenced documents
3 Principle
4 Reagents and materials
4.1 Purity
4.2 Preparation of the indicator solution
4.2.1 Sodium chloride reagent
4.2.2 Ferricyanide reagent
4.3 Optional equipment
5 Procedure
5.1 Specimen preparation
5.2 Treated test paper
5.2.1 Iron contamination
5.2.2 Preparation
5.2.3 Applying the test paper
5.2.4 Test paper development
5.3 Test paper examination
5.4 Discontinuity enumeration
5.5 Retest
6 Expression of results
7 Test report
Cited references in this standard
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