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A new method for assessment of corrosion around a scribe in the coating on a metal sheet

✍ Scribed by W. Oelßner; F. Berthold; H. Werner

Publisher
John Wiley and Sons
Year
2003
Tongue
German
Weight
342 KB
Volume
54
Category
Article
ISSN
0947-5117

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Scratches or any other defects in the polymer coating on metallic materials are preferred sites of increased corrosion attack. The undermining of coatings originating from such a damage is of great practical relevance and thus now as before also subject of scientific studies. In the paper a new method for in situ measurements of corrosion processes under coatings by using a sensor array will be presented. The progress of undermining originating from a scribe was determined by resistance and impedance measurements between individual sensor elements and the metallic substrate in dependency on the substrate material and other parameters.

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