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Influence of Structure, Composition and Surface Morphology on Coating Adhesion and Painted Corrosion Performance of ZnNi Alloy Coated Sheet Steels
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Abstract
A number of ZnNi coatings were investigated to determine the effect of phase structure, composition and surface morphology on coating adhesion and painted corrosion performance. The differences in the coating characteristics were achieved by controlled variation of selected process parameters in a series of pilot studies and production trials. It was seen that the coating adhesion, as measured in a draw bead simulator test, is influenced by the Ni content and the morphology of the coating, with 13%Ni and a micronodular surface morphology favoring good coating adhesion. Results of scribe/chipping corrosion tests show that paint creepage from the scribe on ZnNi coatings is equal to or less than that on electrozinc coatings of twice the thickness, and this property is influenced by the Ni content but not by the ZnNi structure or coating morphology. The paint loss from chipping, however, is insensitive to substrate differences, probably due to the good anti-chipping characteristics of the current automotive paint systems, one of which was employed in this study. It is concluded from this study that a generally uniform and consistent corrosion performance can be expected from ZnNi coatings over a wide range of composition and microstructures.
Citation
Shastry, C., "Influence of Structure, Composition and Surface Morphology on Coating Adhesion and Painted Corrosion Performance of ZnNi Alloy Coated Sheet Steels," SAE Technical Paper 912286, 1991, https://doi.org/10.4271/912286.Also In
References
- Yamato K. Honjo T. Ichida T. “Development of Zn-Ni Electroplated Steel Sheets ‘River Hi-Zinc’ and ‘River Hi-Zinc Super’” Kawasaki Steel Technical Report No. 12 July 1985 75 84
- Shibuya A. Kurimoto T. Kimoto M. “Properties of Ni-Zn Alloy Electroplated Steel Sheets” The Sumitomo Search 31 November 1985 75 90
- Kurimoto T. Hoboh Y. Oishi H. Yanagawa K. Noumi R. “Corrosion Performance of Zn-Ni Alloy Plated Steel in Automotive Body Panels” SAE Paper No. 831837 , Proceedings of the 2nd Automotive Corrosion and Prevention Conference 1983
- Noumi R. Hoboh Y. Kurimoto T. Suzuki N. Wakano S. “Development of Precoated Steel Sheets for Auto Bodies” The Surnitomo Search 33 November 1986
- Lambert M. R. Hart R. G. “Corrosion Resistance of 0-15% Ni-Zn Alloy Electroplated Coatings” SAE Paper No. 860266 , SAE International Congress and Exposition Detroit, Michigan February 1986 Society of Automotive Engineers, Inc. Warrendale, Pa.
- Shastry C. R. Townsend H. E. “Mechanisms of Cosmetic Corrosion in Painted Zinc and Zinc-Alloy-Coated Sheet Steels” Corrosion 45 2 1989 103 119
- Koesters K. Androsch F. M. Pimminger M. Wallner F. Maschek M. “Short Report for the AESF Symposium” Proc. of the Fifth AESF Continuous Strip Plating Symposium May 5 - 7 Dearborn, Mich. 1987 American Electroplaters and Surface Finishers Society Orlando, Fla.
- Yamato K. Ichida T. Irie T. “Progress in Precoated Steel Sheets for Automotive Use” Kawasaki Steel Technical Report No. 22 May 1990 57 66
- Shastry C. R. Townsend H. E. “Failure Mechanisms of Painted Sheet Steel in a Chipping Corrosion Test” Proc. International Conference on Zinc and Zinc Alloy Coated Steel Sheet Tokyo, Japan 1989 511 518
- Androsch F. M. Pimminger M. Koesters K. “Laboratory Results on High Speed Zn-Ni Electroplating” Proc. of Sixth AESF Continuous Steel Strip Coating Symposium May 8-10 1990 Pittsburgh, Pa. American Electroplaters and Surface Finishers Society Orlando, Fla.
- Kotegawa J. Watanabe K. Miura I. Fukuda S. Irie T. “Effect of Fe 2+ and Fe 3+ in Bath on Zn-Ni Alloy Coating” Nisshin Seiko Giho 54 1986 13 23
- Tsuji H. Kamitani M. Bosei-Kanri 9 1983 268
- van Ooij W. J. Jossic T. “Mechanism of Automotive Steel Corrosion in Salt Spray, Scab, Filiform and Atmospheric Conditions” SAE Paper No. 870647 , SAE International Congress and Exposition Detroit, Michigan February 1987 Society of Automotive Engineers, Inc. Warrendale, Pa.
- Fountoulakis S. G.
- Stephens M. L. Davidson D. D. Soreide L. E. Shaffer R. J. “Developing the Chipping Corrosion Test” SAE Paper No. 862013 , Proceedings of the SAE Automotive Corrosion and Prevention Conference Dearborn, Mich. December 1986 49 60 Society of Automotive Engineers, Inc. Warrendale, Pa
- Gray B. M. Shaffer R. J. Stephens M. L. Davidson D. D. “An Evaluation of Cosmetic Corrosion Performance of Zinc and Zinc Alloy Coated Steels” SAE Paper No. 862014 , Proceedings of the SAE Automotive Corrosion and Prevention Conference Dearborn, Mich. December 1986 61 67 Society of Automotive Engineers, Inc. Warrendale, Pa
- “Test Method TM 47-18” General Motors Corp. November 19 1984
- Hansen P. L. Jessen C. Q. “The Microstructure of Electrodeposited Zn-Ni Coatings” Scripta Met. 23 1989 1387 1390
- Chen Y. L. Snyder D. D. “Microstructural Investigation of Electroplated Zn-Ni Coatings on Cold-rolled Steel” Proc. TMS Symposium on Zinc-based Coatings: Metallurgy and Performance” Detroit, MI October 1990 95 108 The Minerals, Metals and Materials Society Warrendale, Pa
- Massinon D. Thierry D. “Rate Controlling Factors in the Cosmetic Corrosion of Coated Steels” Corrosion 91 NACE March 11-15 1991 Cincinnati, Ohio The National Association of Corrosion Engineers Houston, Texas
- Schey J. A. Tribology in Metalworking American Society for Metals Metals Park, Ohio 1983 27 79