Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Investigation of shinning Spot Defect on Hot-Dip Galvanized Steel Sheets

  • Liu, Yonggang (Auto Sheet Strategic Business Unit, Maanshan Iron & Steel Co. Ltd.) ;
  • Cui, Lei (Auto Sheet Strategic Business Unit, Maanshan Iron & Steel Co. Ltd.)
  • Received : 2014.04.22
  • Accepted : 2014.08.28
  • Published : 2014.08.31
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Abstract

Shinning spot defects on galvanized steel sheets were studied by optical microscope, scanning electron microscope(SEM), Energy Dispersive Spectrometer (EDS) and Laser-Induced Breakdown Spectroscopy Original Position Statistic Distribution Analysis (LIBSOPA) in this study. The research shows that the coating thickness of shinning spot defects which caused by the substrate defect is much lower than normal area, and when skin passed, the shinning spot defect area can not touch with skin pass roll which result in the surface of shinning spot is flat while normal area is rough. The different coating morphologies have different effects on the reflection of light, which cause the shinning spot defects more brighter than normal area.

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References

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