Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Performance of Hot-dip Zn-6%Al-3%Mg Alloy Coated Steel Sheet as Automotive Body Material

  • Shimizu, Takeshi (Surface Treatment Dept., Steel & Technology Development Labs., Nisshin Steel Co., Ltd.) ;
  • Asada, Hiroshi (Forming Technology Dept., Steel & Technology Development Labs., Nisshin Steel Co., Ltd.) ;
  • Morikawa, Shigeru (Forming Technology Dept., Steel & Technology Development Labs., Nisshin Steel Co., Ltd.)
  • Received : 2009.07.30
  • Accepted : 2010.03.27
  • Published : 2010.04.01
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Abstract

For the purpose of applying a hot-dip Zn-6mass%Al-3mass%Mg alloy coated steel sheet (ZAM) to automotive body materials, a laboratory study of the general properties required for inner and outer panels of automotive bodies was performed. Even with only light coating weight, ZAM showed an excellent corrosion resistance in terms of both cosmetic and perforation corrosion compared to the currently used materials for automotive bodies, GI70 and GA45. In our study, it was confirmed that ZAM exhibits as good as or better properties than GI70 in terms of spot weldability and press formability. Furthermore, since the same corrosion resistance can be achieved with less coating weight by applying ZAM, laser weldability is better than GI and GA.

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References

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