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ASTM B1026-24

Current Revision

Standard Test Method for Measurement of Thickness of Chromium and Chromium Alloy Deposits by the Coulometric/White Light Interferometry

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1.1 This test method covers the determination of the thickness of metallic coatings by the coulometric method, also known as the anodic solution or electrochemical stripping method, combined with a white light interferometry.

1.2 This test method is particularly applicable to decorative trivalent chromium deposits but can be used for other thin chromium deposits. The range of testing is typically 0.1 µm to 0.5 µm, but it can include thicker deposits.

1.3 Units—The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard.

1.4 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


4.1 Measurement of the thickness of a coating is essential to assessing its utility and cost.

4.2 The coulometric method destroys the coating over a very small (about 0.1 cm2) test area. Therefore, its use is limited to applications in which a bare spot at the test area is acceptable or when the test piece may be destroyed.

SDO ASTM: ASTM International
Document Number B1026
Publication Date May 1, 2024
Language en - English
Page Count 3
Revision Level 24
Supercedes
Committee B08.10
Publish Date Document Id Type View
May 1, 2024 B1026-24 Revision