Journal of Northeastern University(Natural Science)

Journal of Northeastern University ›› 2005, Vol. 26 ›› Issue (11): 82-85.DOI: -

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Electrochemical properties of Zn/Zn-Al alloys as hot-dip galvanized coating protecting steel in hot seawater

Li, Xin (1); Du, Hong-Yan (2); Wei, Xu-Jun (1); Li, Yan (3)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China; (2) College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China; (3) Institute of Oceanology, Chinese Academy of Science, Qingdao 266071, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2005-11-15 Published:2013-06-24
  • Contact: Li, X.
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Abstract: To compare quantitatively the cathodic protection effects of Zn and several Zn-Al alloys as hot-dip galvanized coating materials on steel in 50°C seawater, their electrochemical properties were tested with constant current, according to the China national standard GB/T 17848-1999. Their current efficiencies were then calculated with surface's corrosive peeling and homogeneity observed. Thus, their effects of anti-corrosion protection were evaluated. The results showed that the electrochemical properties of such zinc-aluminum alloys as Zn-5Al-0.1RE, Zn-5Al-0.5Mg, Zn-6Al-3Mg, Zn-11Al-0.2Si-3Mg, Zn-25Al-0.2Si-0.2Mg and Zn-25Al-0.2Si-0.2RE are medium, while Zn is the best and Zn-55Al-1.6Si alloy the poorest one.

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