An Electrolytic Thickness Tester for Plated Metal Coatings
- 1 January 1948
- journal article
- Published by The Electrochemical Society in Journal of the Electrochemical Society
- Vol. 93 (3) , 79-83
- https://doi.org/10.1149/1.2773793
Abstract
A device is described which permits accurate measurement of the thickness of electrodeposited metal coatings. The principle of the instrument is the anodic dissolution of a defined area of the plated metal, using the current‐time product as a measure of the thickness. The stripping current is held constant during a test and the removal time is automatically indicated. Successfully measured coatings include: tin, zinc, lead, cadmium, copper, chromium, silver, gold, and brass on steel; and tin, zinc, lead, and chromium on brass or copper. The accuracy is high; e.g., 30 micro‐inches (0.76 micron) of tin on steel can be measured with an accuracy of plus or minus 2%.Keywords
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