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The Corrosion Performance of Aluminum Automotive Body Panels in Service
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English
Abstract
An extensive field study was made of the corrosion of aluminum alloy panels in over fifteen years of service in three regions of the USA. Panels removed from service exposed vehicles were subjected to further testing to determine the relationship between field service, accelerated laboratory corrosion testing, and marine environment exposure for two years at Daytona Beach, Florida.
In addition, two 42 year old aluminum bodied Dyna Panhard vehicles were recovered in France, examined closely, and subjected to similar tests.
Few examples of significant corrosion were found in the field, and only one example of filiform corrosion on aluminum sheet in service. Steel panels on the same vehicles frequently rusted through, and filiform corrosion was seen occasionally. Laboratory tested aluminum panel samples frequently showed filiform corrosion and severe intergranular corrosion. No filiform corrosion on recovered panels has been observed to date at the Daytona Beach site, although some laboratory prepared samples exhibit general corrosion. Performance of aluminum alloy panels is clearly superior to steel.
Many laboratory corrosion tests in current use are far too severe, and do not predict actual service behavior. The relevance of accelerated testing to service behavior is discussed.
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Authors
- K.R. Brown - Kaiser Aluminum and Chemical Corporation
- R.A. Woods - Kaiser Aluminum and Chemical Corporation
- W. Springer - Kaiser Aluminum and Chemical Corporation
- C. Fujikura - Furukawa Aluminium
- M. Nabae - Furukawa Aluminium
- Y. Bekki - Furukawa Aluminium
- R. Macé - Pechiney
- J.C. Ehrstrom - Pechiney
- T. Warner - Pechiney
Citation
Brown, K., Woods, R., Springer, W., Fujikura, C. et al., "The Corrosion Performance of Aluminum Automotive Body Panels in Service," SAE Technical Paper 980460, 1998, https://doi.org/10.4271/980460.Also In
References
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- Aluminum Association periodic automotive publications 1978 to 1995 Aluminum Association Washington, USA
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- “Development of Galvanized Aluminum Alloy Sheet for Body Panels with an Excellent Filiform Corrosion Resistance.” Kaneko Kouichi Mochizuki Asao Nakajima Hiroki Ikeda Kouki Toyose Kikuo SAE International Congress and Exposition Proceedings Detroit Michigan, USA March 1-5 1993 Paper No. 930703
- “Filiform Corrosion of Aluminum Auto Body Sheet in Accelerated and Outdoor Environments.” Colvin E.L Vega L.F. Egbert M.W. Nakayama T. Ikeda K. Shige H. Ueda T. Inman M. SAE Automotive Corrosion and Prevention Symposium Feb. 1997