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This study focuses on a better understanding of significant pitting corrosion on coating surface damaged carbon steels, or low alloy steels, during salt spray testing for automotive applications. Anodic cyclic polarization test was used to evaluate the severity of pitting corrosion, and to estimate the corrosion rate of raw materials.
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In this study a coupled multielectrode array sensor (CMAS) is used for coating and pretreatment evaluation on carbon steels. The preliminary testing results are summarized and discussed for further application.
The purpose of the “Bore Test” is to know the external quality of the coating after the installation of the pipe section, as picture 1. NACE standard “TM-102-2002-SG”1a defines four kinds of coating quality such as: excellent, good, fair and poor. To know the final quality of coating with this procedure. It was used two different electrical tests. DC current test using minimum voltage drop method and, the 3 pole test which is called by the same manufacture of the Multifunction Ground Resistance tester.
This study focuses on a better understanding of pitting and crevice corrosion on coating surface damaged carbon steels in automotive applications. Immersion and cyclic polarization tests were conducted on bare and coated metals in a 5% NaCl solution.