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Calcium Sulfonate-Based Coatings as Used in the Automotive Industry Today
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Abstract
Calcium sulfonate technology has been familiar to the automotive industry for several decades. Their original and still most common utility has been demonstrated as a detergent used in fuels and lubricants. The effectiveness of sulfonate chemistry as overbased with calcium carbonate provides detergency and surface active properties which keep dirt and metal particles suspended in lubricant oils and yield excellent corrosion inhibiting charecteristics with regard to ferrous substrates. The basic chemistry of such compounds is discussed.
The corrosion inhibiting mechanism of sulfonates was subsequently extended to provide an active base from which many metal protectorant coatings have been formulated. Examples include cavity waxes, autobody undercoatings, temporary coatings for parts, and hemflange seam sealants and penetrants.
Corrosion data exhibited by calcium sulfonate based coatings is presented. Their protective properties as used in traditional corrosion preventative products employed in the automotive industry are described.
The qualities of calcium sulfonates lend application to corrosion inhibition in the automobile today.
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Citation
Kmetz, J., "Calcium Sulfonate-Based Coatings as Used in the Automotive Industry Today," SAE Technical Paper 912295, 1991, https://doi.org/10.4271/912295.Also In
References
- Higgins, W.A. Perz, J.S. Quinn, R.E. “Sulfonate and Phosphate Chemistry to Improve Corrosion Inhibition and Adhesion” 59th Annual Meeting of the Federation for Coatings Technology Detroit, MI 1981
- McArthur, H. Corrosion Prediction and Prevention in Motor Vehicles Ellis Horwood Limited Chichester, England 1988 275
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- McArthur 69
- Bauer, C.P. Kmetz, J.J. Beicos, S.S. Cech, L.S. “Round Robin Study on Seam Penetration and Rust Protection” SAE Paper 892575 1988
- McArthur 315 18
- McArthur 315 18