---
title: "ASTM B504"
url: "https://mat-cs.com/astm-b504"
description: "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."
---

ASTM Standard

# ASTM B504

Standard Test Method for Measurement of Thickness of Metallic Coatings by the Coulometric Method

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## 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.

## Scope

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.