ASTM B504 – Standard Test Method for Measurement of Thickness of Metallic Coatings by the Coulometric Method
Significance and Use
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 where a bare spot at the test area is acceptable or the test piece may be destroyed.
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.