Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Electrochemical Behavior and Corrosion Protection of Galvanized Steel Sheet Treated in Ce Based Solution

  • Song, Yon-Kyun (Technical Research Laboratories, POSCO) ;
  • Mansfeld, F. (Dept. of Materials Science, University of Southern California)
  • Published : 2008.12.01
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Abstract

A reaction and evaporation types of cerium based conversion coatings were developed for galvanized steel sheet. The corrosion loss Q(Cb/cm2) and protection efficiency P(%) were obtained using a polarization technique for cerium based conversion coatings on galvanized steel exposed to 0.5N NaCl for 7 days. The microstructure of coating layer was observed using SEM. An excellent corrosion reistnce of galvanized steel was obtained by two types of cerium basd conversion coating. Salt spray test was done to evaluate the corrosion resistance of three samples by visual inspection. The corrosion ranking of three samples-untreated and two treatedby electrochemical data was matched well with the results of salt spray test.

Keywords

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