ASTM B 866 Standard Test Method for Gross Defects and Mechanical Damage in Metallic Coatings by Polysulfide Immersion

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ASTM B 866 Document Information:

Title
Standard Test Method for Gross Defects and Mechanical Damage in Metallic Coatings by Polysulfide Immersion

ASTM International

Publication Date:
Oct 10, 1995

Scope:

This test method covers equipment and methods for detecting gross defects and mechanical damage (including wear-through) in metallic coatings where the breaks in the coating penetrate down to a copper or copper alloy substrate.

This test method is suitable for coatings consisting of single or combined layers of any coating that does not significantly tarnish in an alkaline polysulfide solution. Examples are gold, nickel, tin, tin-lead, and palladium, or their alloys.

Recent reviews of porosity testing (which include those for gross defects) and testing methods can be found in literature. An ASTM guide to the selection of porosity and gross defect tests for electrodeposits and related metallic coatings is available as Guide B 765. Other related porosity test standards are Test Methods B 735, B 741, B 798, B 799, and B 809.

The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Keywords:

electrodeposits

gross defects

mechanical damage

metallic coatings

polysulfide immersion

porosity testing

wear-through

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