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Corrosion Behavior of Electrophoretically Coated Cold Rolled, Galvanized and Galvannealed Steel Sheet for Automobiles - Adaptability of Cataphoretic Primer to Zinc Plated Steel
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English
Abstract
The corrosion behavior of cold rolled-, galvanized and galvannealed steel sheet was investigated. Unpainted, ED painted and three-coat painted specimens were used. Cataphoretic primer prevents corrosion on the underlying steel more effectively than an anaphoretic primer. Cathodically electropainted cold rolled steel exhibits a good film adhesion in all tests. In alternately wet and dry conditions cathodically electrodeposited zinc plated steels show a better adhesion property than anodically electrodeposited ones. Upon consideration of actual car driving conditions, it was concluded that zinc plated steels, as well as cold rolled steel, are suitable for cathodic painting system.
Authors
- Yasuhiko Miyoshi - Products Research and Development Laboratories, Nippon Steel Corp. Sagamihara, Kanagawa, Japan
- Yoshihiro Oie - Products Research and Development Laboratories, Nippon Steel Corp. Sagamihara, Kanagawa, Japan
- Minoru Amano - Products Research and Development Laboratories, Nippon Steel Corp. Sagamihara, Kanagawa, Japan
- Hideo Koyahara - Products Research and Development Laboratories, Nippon Steel Corp. Sagamihara, Kanagawa, Japan
Citation
Miyoshi, Y., Oie, Y., Amano, M., and Koyahara, H., "Corrosion Behavior of Electrophoretically Coated Cold Rolled, Galvanized and Galvannealed Steel Sheet for Automobiles - Adaptability of Cataphoretic Primer to Zinc Plated Steel," SAE Technical Paper 820334, 1982, https://doi.org/10.4271/820334.Also In
References
- Kawai H. Homma M. Miyazaki T. “The Evaluation and the Application of Cataphoretic Primer,” Japan Finishing 18 1 1979 82
- Takahashi H. Shirogane Y. Matsudo K. Adaniya T. Omura M. “Corrosion Under Paint Film of Various Galvanized Steels,” SAE Paper 800145 February 25-29 1980
- Neville R. J. “A Test for Under-vehicle Corrosion Resistance,” Corrosion 80 136
- Funke W. “A Study on the Corrosion Preventing Effect of Paint and Coating,” farbe + lack 84 11 1978 865