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Bulletin of Materials Science

, Volume 24, Issue 3, pp 301–304 | Cite as

Study on growth factors of intermetallic layer within hot-dipped 25% Al-Zn alloy coating on steel

  • Yan Li
  • Ying Ma
  • Baorong Hou
  • Falun Feng
  • Xujun Wei
Alloys and Steels

Abstract

25% A1-Zn alloy coating performs better than hot dip galvanized coating and 55% A1-Zn-Si coating with regard to general seawater corrosion protection. This study deals with the interfacial intermetallic layer’s growth, which affects considerably the corrosion resistance and mechanical properties of 25%A1-Zn alloy coatings, by means of three-factor quadratic regressive orthogonal experiments. The regression equation shows that the intermetallic layer thickness decreases rapidly with increasing content of Si added to the Zn-Al alloy bath, increases with rise in bath temperature and prolonging dip time. The most effective factor that determined the thickness of intermetallic layer was the amount of Si added to Zn-Al alloy bath, while the effect of bath temperature and dip time on the thickness of intermetallic layer were not very obvious.

Keywords

Galvanization by hot-dipping intermetallic layer 25% Al-Zn alloy coating 

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Copyright information

© Indian Academy of Sciences 2001

Authors and Affiliations

  • Yan Li
    • 1
  • Ying Ma
    • 1
  • Baorong Hou
    • 1
  • Falun Feng
    • 1
    • 2
  • Xujun Wei
  1. 1.Institute of OceanologyChinese Academy of SciencesQingdaoP.R. China
  2. 2.Northeastern UniversityShenyangP.R. China

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