ASTM B504 Standard test method for Measuring the thickness of Metal coatings by the Coulometric method includes the determination of the thickness of metal coatings by the Coulometric method, also known as the anode solution or electrochemical stripping method.
Meaning and use

4.1 The importance of evaluating coating thickness for evaluating its utility and cost goes without saying.

4.2 The coulomb method destroys the coating in a very small (about 0.1 cm 2) test area. Therefore, its use is limited to applications where the bare point of the test area is acceptable or where the test piece may be damaged.

ASTM B504-2017 Standard Test Method for Measuring the Thickness of Metal Coatings by the Coulometric Method

Step 1: Scope

1.1 The test method includes the determination of the thickness of the metal coating by the coulometric method, also known as the anode solution or electrochemical stripping method.

1.2 This standard is not intended to address all safety concerns, if any, associated with its use. It is the responsibility of users of this standard to establish appropriate safety, health and environmental practices and to determine the applicability of regulatory restrictions prior to use.

1.3 This international standard is based on internationally recognized standardization principles established in the “Decision on Principles for the Development of International Standards, Guidelines and Recommendations” issued by the WTO Committee on Technical Barriers to Trade (TBT) Committee.