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Journal of Materials Science

, Volume 26, Issue 4, pp 1045–1050 | Cite as

Influence of the high temperature treatment of zinc phosphate conversion coatings on the corrosion protection of steel

  • T. Sugama
  • L. E. Kukacka
  • N. Carciello
  • J. B. Warren
Papers

Abstract

An anhydrous α-Zn3(PO4)2 phase converted by the dehydration of hydrous zinc phosphate, Zn3(PO4)2·2H2O, crystal coatings in air at a temperature of approximately 300 °C, significantly enhances the corrosion resistance of steel, and also reduces the susceptibility of the crystals to alkaline dissolution. A subsequent α→γ phase transition at approximately 500 °C results in a poor protection behaviour, because of the formation of numerous microcracks on the crystal faces.

Keywords

Zinc 2H2O Phase Transition Dehydration Corrosion Resistance 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman and Hall Ltd 1990

Authors and Affiliations

  • T. Sugama
    • 1
  • L. E. Kukacka
    • 1
  • N. Carciello
    • 1
  • J. B. Warren
    • 1
  1. 1.Process Sciences Division, Department of Applied ScienceBrookhaven National LaboratoryUptonUSA

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