A measuring method and instrument for the evaluation of corrosion resistance of chromate layers

The applicability of a technique based on Faradaic distortion measurements for the quality tests of chromate layers formed on zinc surface has been studied. An instrument was developed on the above principle and tested by parallel measurements with equipment consisting of a Solartron Frequency Respo...

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Bibliographic Details
Published inCorrosion science Vol. 34; no. 7; pp. 1147 - 1155
Main Authors Pirnát, A., Mészáros, L., Mészáros, G., Lengyel, B.
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 01.07.1993
Elsevier Science
Subjects
Applied sciences
Exact sciences and technology
Heat treatment
Metals. Metallurgy
Production techniques
Thermochemical treatment and diffusion treatment
Measuring instrument
Corrosion resistance
Electrochemical method
Measurement technique
Surface layer
Chromating
Faradaic impedance
Zinc
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Summary:The applicability of a technique based on Faradaic distortion measurements for the quality tests of chromate layers formed on zinc surface has been studied. An instrument was developed on the above principle and tested by parallel measurements with equipment consisting of a Solartron Frequency Response Analyzer and a potentiostat connected to an IBM PC. The results were compared with salt-spray test data. A good correlation was observed taking into consideration the reproducibility of corrosion measurements. Thus the instrument was found to be suitable for the quality test of chromated zinc surfaces.
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ISSN:0010-938X
1879-0496
DOI:10.1016/0010-938X(93)90294-Q