This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Corrosion Rates of Steel, Zinc and Bi-Metal Couples in the Field and in Laboratory Environments
Technical Paper
2002-01-0206
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Automotive corrosion is a complex issue since a vehicle is comprised of many materials and different locations on the vehicle experience different corrosion environments. As a result, multiple corrosion mechanisms are encountered. Hence, development of an accelerated corrosion test for automobiles that correlates well to real world corrosion situations is a challenging task. Most corrosion tests currently used in the automotive industry were designed for corrosion of steel. With an increasing use of aluminum and magnesium alloys, galvanic corrosion becomes a critical issue. Applying corrosion tests designed for steel to evaluate galvanic corrosion of lightweight alloys could lead to erroneous conclusions since the acceleration factors for the two corrosion mechanisms may be very different. To better understand the impact of corrosion environments on different corrosion mechanisms, corrosion sensors have been installed on the rooftop and under body of a vehicle to measure general corrosion rates of steel and zinc as well as galvanic corrosion rates of aluminum/steel and zinc/steel couples. The vehicle was driven daily in the Detroit metropolitan area and corrosion rates were measured every 10 minutes over a one-year period. Corrosion rates for the same materials were also measured in cyclic laboratory tests under various salt loads. Analysis of such data can lead to development of laboratory corrosion tests that shown improved correlation to real world corrosion situations.
Recommended Content
Authors
Topic
Citation
Gao, G., Wang, T., and Makeyev, V., "Corrosion Rates of Steel, Zinc and Bi-Metal Couples in the Field and in Laboratory Environments," SAE Technical Paper 2002-01-0206, 2002, https://doi.org/10.4271/2002-01-0206.Also In
References
- Moran J.P. Egbert M.W. Corrosion and Corrosion Control of Aluminum and Steel in Lightweight Automotive Applications NACE International 382/1 1995
- Townsend H.E. Corrosion and Corrosion Control of Aluminum and Steel in Lightweight Automotive Applications NACE International 372/1 1995
- Kempe P. Denzine A. Tiefnig E. “An Advanced Atmospheric Corrosion Measurement System” Corrosion 2000 , NACE Technical Paper 2000-00405 NACE International 2000
- “Cosmetic Corrosion Lab Test” SAE International 1998
- Wang T. Gao G. Bomback J. Ricketts M. SAE Technical Paper 2000-01-1194 SAE International 2000
- Lutze F. W. McCune D. C. Shaffer R. J. Smith K. Thompson L. S. Townsend H. E. “Inter-laboratory Testing to Evaluate Improvements in the Precision of the SAE J2334 Cyclic Corrosion Test” SAE Congress Detroit March 2001
- Rendahl B. Hedlund S. “The Influence of Road Deicing Salts on Motor Vehicle Corrosion” Automotive Corrosion and Protection Baboian R. NACE International 1992
- Zhang X.G. “Corrosion Ratios of Steel to Zinc in Natural Corrosion Environments” Corrosion 55 787 1999
- Kucera V. Mattsson E. “Atmospheric Corrosion of Bimetallic Structures” Atmospheric Corrosion Ailor W.H. 561 574 John Wiley & Sons New York 1982
- “Lowering of Vapor Pressure by Salts in Aqueous solution at 100oC” CRC handbook of Chemistry and Physics 72rd Lide D.R. CRC Press Inc. 5 103 1991
- McCafferty E. “Distribution of Potential and Current in circular corrosion cells having unequal polarization parameters” J. Electrochem. 124 1869 1977
- Granato L.D. Moussavi-Madani M, “Characterization of Corrosion Products and Corrosion Mechanisms on Automotive Coated Steels Subjected to Field and Laboratory Exposure” Lehigh University Report to the AISI Task Force on Corrosion Jan. 1996
- Roudabush L.A. Townsend H.E. McCune D.C. “Update on the Development of an Improved Cosmetic Corrosion Test by the Automotive and Steel Industries” Automotive Corrosion and Prevention Conference Proceedings SAE Warrendale, PA 1993 53 63
- Townsend H.E. McCune D.C. “Round-Robin Evaluation of a New Standard Laboratory Test for Cosmetic Corrosion” Automotive Corrosion and Prevention Conference Proceedings SAE Warrendale, PA 1997 53 68
- Simpson T.C. Hoffman J.D. “Capillary Electrophoresis Analyses of J2334 Samples” Report to the AISI Task Force on Corrosion 1998