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Corrosion Resistance of 0-15% Ni-Zn Alloy Electroplated Coatings
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Abstract
The corrosion resistance of 0 to 15% Ni-Zn electroplated alloy coatings was examined using salt-spray, cyclic corrosion and electrochemical tests. Our findings support those of previous investigations showing that the single phase (gamma) 11 to 15% Ni-Zn coatings provide the best barrier protection for unpainted applications, while the pure Zn coatings provide the highest level of galvanic protection. However, we have found that dual phase (gamma + eta) 9% Ni-Zn coatings appear to provide the best compromise between galvanic and barrier corrosion protection, and a minimum amount of paint delamination. In addition, we found that deformation, similar to body panel stamping, does not have a significant effect on the corrosion resistance of the pure Zn and low Ni-content coatings. However, deformation does produce cracking and a reduction in corrosion resistance for unpainted samples having higher Ni-content coatings.
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Citation
Lambert, M. and Hart, R., "Corrosion Resistance of 0-15% Ni-Zn Alloy Electroplated Coatings," SAE Technical Paper 860266, 1986, https://doi.org/10.4271/860266.Also In
References
- Lambert M.R. Hart R.G. Townsend H.E. “Corrosion Mechanism of Zn-Ni Alloy Electrodeposited Coatings” Proceedings of the 2nd Automotive Corrosion Prevention Conference SAE 831817 Society of Automotive Engineers 81 87 1983
- Shibuya A. Kurimoto T. Korekawa K. Noti K. Tetsu-To-Hagane 66 (7) 771 778 1980
- Siitari D.W. Sagiyama M. Hara T. Transactions of The Iron and Steel Institute of Japan 23 959 966 1983
- Noumi R. Nagasaki H. Foboh Y. Shibuva A. SAE 820332 “Newly Developed Ni-Zn Alloy Plated Steel Sheet “SZ” end Its Application to Automotive Usages” SAE Warrendale, PA 1982
- Lambert M.R. Townsend H.E. Hart R.G. Frydrych D.J. Industrial & Engineering Chemistry Product R&D 24 (3) 378 384 1985
- Franks L.L. Nowak E.T. “Paintability Performance Of Metallic Coated Steels” SAE, Proceedings of the 2nd Automotive Corrosion Prevention Conference SAE 831819 Society of Automotive Engineers 99 113 1983
- Johnson W.R. Vrable J.B, “Corrosion Resistance and Paintability of Zinc and Zinc-Alloy Coatings for Automotive Sheet” SAE 840213 Society of Automotive Engineers Warrendale, PA 1984
- Hakano S. Shibuya A. Hobo Y. Nishihara M. Transactions of The Iron and Steel Institute of Japan 23 967 973 1983
- Hecker S.S. Sheet Metal Industries November 1975 671 676