Chapter 18. Effect of Steel Thickness on Direct-On Cover Coat Enamel Adherence Rating

  1. William Smothers
  1. D. L. Bowley and
  2. R. J. Jesseman

Published Online: 26 MAR 2008

DOI: 10.1002/9780470320396.ch18

Proceedings of the 48th Porcelain Enamel Institute Technical Forum: Ceramic Engineering and Science Proceedings, Volume 8, Issue 5/6

Proceedings of the 48th Porcelain Enamel Institute Technical Forum: Ceramic Engineering and Science Proceedings, Volume 8, Issue 5/6

How to Cite

Bowley, D. L. and Jesseman, R. J. (1987) Effect of Steel Thickness on Direct-On Cover Coat Enamel Adherence Rating, in Proceedings of the 48th Porcelain Enamel Institute Technical Forum: Ceramic Engineering and Science Proceedings, Volume 8, Issue 5/6 (ed W. Smothers), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470320396.ch18

Author Information

  1. Armco Inc. Research and Technology Center 703 Curtis St. Middletown, OH 45043

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1987

ISBN Information

Print ISBN: 9780470374726

Online ISBN: 9780470320396

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Keywords:

  • hydraulic;
  • panels;
  • hemispherical;
  • component;
  • adherence

Summary

Sheet steel thickness was confirmed to affect the direct-on cover coat enamel adherence rating. The apparent adherence deteriorated as the sheet thicknesses increased from 0.05 cm (0.020 in.) to 0.18 cm (0.070 in.) with the Armco 20.9 J (190 in.-lb) impact, ASTM C988 8.8J (80 in.-lb) impact, and ASTM C313 hydraulic press methods. Effects of increased gage on the adherence rating were immediately encountered with both impact tests, but the onset was delayed to above 0.10 cm (0.040 in.) thickness with the hydraulic press test. The two impact tests readily revealed adherence variations between different steels. However, the ASTM C313 test did not provide sufficient discrimination for use with direct-on porcelain enamels.