This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Laboratory Techniques and Tube Alloy Ranking to Improve Internal Corrosion Resistance of Automotive Radiators
Annotation ability available
Sector:
Language:
English
Abstract
Internal corrosion resistance of radiators and heaters is becoming more important as automotive manufacturers seek durability past 10 years, and as the usage of aluminum heat exchangers spreads to markets with poorly maintained engine coolant fluid from a corrosion inhibition standpoint. Simulated Service Corrosion Tests (SSCT) are used to evaluate the resistance of three aluminum alloys to tube failure in various corrosive water and depleted coolant conditions. The paper documents results from such tests that lead to two major conclusions: (1.) A weakly inhibited Oyama water solution with a silicated North American engine coolant is highly effective in ranking internal liner alloys for their pitting corrosion resistance, and (2.) AA7072 lined tubes exhibit superior pitting corrosion resistance compared to 1XXX lined tubes. Electrochemical test data obtained in a simulated pit electrolyte and the bulk test solution are utilized to develop an understanding of the SSCT results.
Recommended Content
Authors
Topic
Citation
Krishnakumar, R., Kroetsch, K., and Ahrens, R., "Laboratory Techniques and Tube Alloy Ranking to Improve Internal Corrosion Resistance of Automotive Radiators," SAE Technical Paper 980056, 1998, https://doi.org/10.4271/980056.Also In
References
- Scott A. C,, Paper # 971857, 1997 Vehicle Thermal Management Systems Conference Proceedings, Society of Automotive Engineers, Inc., 400 Commonwealth Drive, Warrendale, PA 15096, USA, 1997, pp. 721-726.
- Garcia J. J. and Twichell D. J., Paper # C496/071/95, 1995 Vehicle Thermal Management Systems Conference Proceedings, Society of Automotive Engineers, Inc., 400 Commonwealth Drive, Warrendale, PA 15096, USA, 1995, pp 257-265
- Ando Y., Nita I., Uramoto M., Ochiai H., and Fujiyoshi T., SAE 870180, 1987.
- Gray A. and Howells A., Paper # 940499, 1994 SAE International Congress and Exposition, 1994.
- Beal R. E. and El-Bourini R., Engine Coolant Testing: Third Volume, ASTM STP 1192, Ed. Beal R. E., American Society of Testing and Materials, Philadelphia, 1993, pp. 83-106.
- Wong K. P. and Alkire R. C., J. of Electrochemical Society, Vol. 137, 1990, pp. 3010 - 3015.
- Pourbaix M., Atlas of Electrochemical Equilibria in Aqueous Solutions, NACE International, Houston, Texas, USA, 1974 (Second English Edition), p 175.
- Galvalle J. R., J. of Electrochemical Society, Vol 123, 1976, p. 464.
- Frankel G. S., Newman R. C., Jahnes C. V., and Russak M. A., J. Electrochemical Society, Vol. 140, 1993, pp 2192-2197.
- Frankel G. S., Scully J. R., and Jahnes C. V., Critical Factors in Localized Corrosion II, Eds. Natishan P. M., Kelley R. G., Frankel G. S., and Newman R. C., The Electrochemistry Society, Inc., Pennington, NJ, USA, 1996, pp. 30-40.
- Rudd W. J. and Scully J. C., Corrosion Science, Vol. 20, 1980, pp. 611-631.
- Woods G. C., Sutton W. H., Richardson J. A., Riley T. N. K. and Malherbe A. G., Localized Corrosion, Eds. Staehle R. W., Brown B. F., Kruger J., And Agrawal A., Nace International, Houston, Texas, USA, pp 526-546.