This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Laboratory Perforation Corrosion Tests of Autobody Steel Sheet
Annotation ability available
Sector:
Language:
English
Abstract
The Corrosion Task Force of the Automotive/Steel Partnership (A/SP) and the Society of Automotive Engineers' Automotive Corrosion and Prevention (SAE/ACAP) committee are working cooperatively on the development of an improved laboratory test for perforation corrosion. This paper gives the results of testing a set of standard SAE perforation corrosion test specimens for up to 160 cycles in the environment of J 2334, the new SAE cyclic test for cosmetic corrosion. SAE J 2334 was found to provide a clear distinction among the test materials. In general, the results indicate that the perforation corrosion resistance of coated products is much greater than that of cold rolled steel, and that it also increases with coating mass, as well as with application of a barrier organic coating. Magnetite (Fe3O4) was the predominant iron corrosion product found in the crevices of the perforation corrosion test specimens. Smaller amounts of goethite (α-FeOOH) were also found. Zincite (ZnO) was the only zinc corrosion product found in the crevices of the zinc and zinc-alloy test specimens. These results will be compared to those of on-vehicle tests of identical specimens currently being conducted at St. John's, Newfoundland; Montreal, Quebec; and Detroit, Michigan.
Recommended Content
Technical Paper | The Relative Effect of Paint Film Thickness on Bimetallic and Crevice Corrosion |
Technical Paper | A Cyclic Model of Cosmetic Corrosion for Painted Steel Sheets |
Technical Paper | A New Electrochemical Method for Scab Corrosion |
Authors
Citation
Townsend, H., "Laboratory Perforation Corrosion Tests of Autobody Steel Sheet," SAE Technical Paper 971000, 1997, https://doi.org/10.4271/971000.Also In
References
- Dorsett, T. E. Davidson, D. D. “SAE ACAP Division III Report - Design of a Standard Test Coupon for Perforation Corrosion, Paper No. 932366 ,” Proceedings of the Sixth Automotive and Corrosion Prevention Conference, P-268 Society of Automotive Engineers Warrendale, PA 1993 403 413
- Townsend, H. E. “Development of an Improved Laboratory Corrosion Test by the Automotive and Steel Industries,” Advanced Coatings Technology, Proceedings of the fourth Annual ESD Advanced Coatings Conference The Engineering Society Ann Arbor, MI 1994 29 49
- Pourbaix, M. Atlas of Electrochemical Equilibria in Aqueous Solutions NACE International Houston 307 321 1974
- Granata, R. D. Moussavi-Madani, M. “Characterization of Corrosion Products and Corrosion Mechanisms on Automotive Coated Steels Subjected to Field and Laboratory Exposure Tests,” Lehigh University Report to the AISI Corrosion Task Force January 10 1996
- Bernard, M. C. Hugot-Le Goff, A. Massinon, D. Phillips, N. “Underpaint Corrosion of Zinc-Coated Steel Sheet Studied by In-Situ Raman Spectroscopy,” Corrosion Science 35 5-8 1339 1349 1993