Corrosion Protection of Automotive Steels by Novel Water-borne Primer Systems

  • Ooij, William J. van (Department of Chemical and Materials Engineering, University of Cincinnati) ;
  • Puomi, Paula (Department of Chemical and Materials Engineering, University of Cincinnati)
  • Published : 2007.10.31

Abstract

Corrosion protection of automotive steels has traditionally been assured by using a zinc phosphate metal pretreatment followed by the deposition of a cathodic electrocoat system. This system has been developed and optimized over the years into a highly robust and dependable system with a high performance. However, in terms of efficiency and use of resources and energy, the need is now felt to develop a simpler system with fewer steps, shorter lines, less energy requirements (curing and e-coat deposition) and less stringent waste disposal requirement (phosphate sludge). We report here on the development of a one-step system that can possibly replace both the zinc phosphate and the e-coating processes. Such a system is based on the so-called superprimer concept that we have recently developed for the replacement of chromate pretreatment and chromate-containing primers in the aerospace industry. With some modifications, such systems can also be adapted for use in the automotive industry.

Keywords

References

  1. G.P. Sundararajan, Silane-based pretreatments of electrocoated metals for corrosion protection, MS Thesis, University of Cincinnati, Chemical and Materials Engineering (CME), 2000
  2. T.F. Child and W.J. Van Ooij, Chemtech., 28, 26 (1998)
  3. W.J. Van Ooij, D. Zhu, M. Stacy, A. Seth, T. Mugada, J. Gandhi and P. Puomi, Tsinghua Sci Technol, 10, 639 (2005)
  4. A. Franquet, J. De Laet, T. Schram, H. Terryn, V. Subramanian, W.J. Van Ooij and J. Vereecken, Thin Solid Films, 348, 37 (2001) https://doi.org/10.1016/S0040-6090(99)00231-X
  5. Put some paper from the Montemor, Ferreira group
  6. C. Shivane, N.B.V. Simhadri and W.J. Van Ooij, Proceedings of Fifth International Symposium on Silanes and Other Coupling agents conference, Toronto, Canada, June 22-24, (2005), K.L. Mittal, editor, Vol.4, VSP, Leiden. pp. 253-274
  7. C. Shivane, P. Puomi and W.J. Van Ooij, Proceedings of Eurocorr 2006 confe rence, Maastricht (2006)
  8. A. Seth, W.J. Van Ooij, P. Puomi, Z. Yin, A. Ashirgade, S. Bafua and C. Shivane, Prog. Org. Coat, 58, 136 (2007)
  9. Ford Laboratory Test Method, BI-23-1 (1981)