Zairyo-to-Kankyo
Online ISSN : 1881-9664
Print ISSN : 0917-0480
ISSN-L : 0917-0480
Potential Distribution Measurement of Under-film Corrosion by Scanning Kelvin Probe
Kazuhiko HondaAkira UsamiHiromasa Nomura
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1998 Volume 47 Issue 6 Pages 403-405

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Abstract

In this paper the filiform corrosion of painted steel substrates was analyzed with a scanning Kelvin probe. The substrates were painted with clear acryl paint, and the dry film thickness was 5μm. In order to induce filiform corrosion, knife scribed specimens were set in a corrosive environment. (5%NaCl solution spray and 40°C 80%RH) By using the scanning Kelvin probe, a potential on the head of filiform corrosion was detected as less noble which showed anodic site. It is possible, with this technique, to measure the under-film corrosion.

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© Japan Society of Corrosion Engineering
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