PAINT ADHESION FOLLOWING DEFORMATION AS RELATED TO THE SURFACE STRUCTURE OF HOT-DIPPED GALVANIZED STEEL

Tests were made to determine paint adhesion to samples of hot-dipped galvanized steel following their severe deformation. The quality of the adhesion of paint increases as the fraction of grains with the (0001) plane approximately parallel to the surface increases. Paint adhesion is improved by a small grain size of the zinc and by a rolling operation. The best paint adhesion has been observed on samples with a small grain size of zinc, very highly oriented with (0001) planes parallel to the surface. The fraction of grains exhibiting orientations approximating (0001) was determined by X-ray diffraction analysis and by a newly developed etching procedure. The effect of grain orientation on paint adhesion is attributed largely to the mechanism of deformation of zinc, although the chemical properties of zinc are also a function of the crystal face exposed at the surface.

  • Supplemental Notes:
    • Presented at the SAE Congress and Exposition, Detroit, 27 February-3 March 1978. Sponsored by the International Lead Zinc Research Organization, Inc., the American Iron and Steel Inst., and the National Coil Coaters Association.
  • Corporate Authors:

    Society of Automotive Engineers (SAE)

    400 Commonwealth Drive
    Warrendale, PA  United States  15096
  • Authors:
    • Leidheiser Jr, H
    • Kim, Doo Kie
  • Publication Date: 1978

Media Info

  • Features: References;
  • Pagination: 8 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00395168
  • Record Type: Publication
  • Source Agency: National Highway Traffic Safety Administration
  • Report/Paper Numbers: SAE 780185, HS-025 332U
  • Files: HSL, USDOT
  • Created Date: Jun 30 1985 12:00AM