Journal of South China University of Technology(Natural Science Edition) ›› 2011, Vol. 39 ›› Issue (11): 132-137,154.

• Materials Science & Technology • Previous Articles     Next Articles

Dissolution Behavior of Solid Iron in Liquid Zinc at High Temperature

Kong Gang1  Liu Ren-bin1  Che Chun-shan1  Lu Jin-tang1  Lin De-xin2  Wang Xia2  Li Han-chang2   

  1. 1. School of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China; 2. Guangdong Anthen Iron Tower and Steel Structure Co.,Ltd.,Foshan 528000,Guangdong,China
  • Received:2011-05-24 Revised:2011-08-21 Online:2011-11-25 Published:2011-10-03
  • Contact: 孔纲(1971-) ，男，博士，副研究员，主要从事金属材料表面物理化学研究． E-mail:konggang@scut.edu.cn
  • About author:孔纲(1971-) ，男，博士，副研究员，主要从事金属材料表面物理化学研究．
  • Supported by:

    国际铅锌研究组织资助项目( ILZRO/IZA/2009023) ; 华南理工大学中央高校基本科研业务费专项资金资助项目( 2009ZM0072)

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Abstract:

The dissolution behavior of solid iron in liquid zinc at a high temperature under natural convection condition was investigated,and the corresponding dissolution mechanism was discussed. The results show that,when solid iron is immersed into liquid zinc,the saturated concentration of Fe in liquid zinc gradually increases with the temperature,that the dissolution rate greatly increases with the temperature of liquid zinc，that the dissolution rate
constants of liquid zinc at 520,560 and 600℃ are respectively 2. 1 × 10 -6,5. 06 × 10-6and 7. 15 × 10-6 m/s,that the dissolution of solid iron in liquid zinc at 520℃ is mainly controlled by the chemical reaction between solid iron and liquid zinc and the diffusion of iron atoms in Fe-Zn alloy layer,while that at 560 and 600℃ is controlled by the diffusion of iron atoms across the concentration boundary layer in liquid zinc.

Key words: solid iron, hot-dip galvanizing, high temperature, dissolution, dissolution rate, diffusion

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