Acta Metallurgica Sinica (English Letters) ›› 2010, Vol. 23 ›› Issue (1): 57-62.DOI: 10.11890/1006-7191-101-57

• 研究论文 • 上一篇    下一篇

The abnormal relationship between rust particles size and rust layer compactness of weathering steels

张明1;杨善武2;郑华3;迟丽丽2;贺信莱1   

  1. 1. 北京科技大学
    2. 北京科技大学材料物理与化学系
    3. 武汉钢铁集团公司
  • 收稿日期:2009-08-12 修回日期:2009-12-02 出版日期:2010-02-25 发布日期:2010-02-09
  • 通讯作者: 杨善武

Abnormal relationship between rust particles size and rust layer compactness of weathering steels

Ming ZHANG1, Shanwu YANG1, Hua ZHENG2, Lili CHI1,Xinlai HE1   

  1. 1.School of Materials Science and Engineering, University of Science and Technology Beijing,Beijing 100083, China
    2.Wuhan Iron and Steel (Group) Corporation, Wuhan 430080, China
  • Received:2009-08-12 Revised:2009-12-02 Online:2010-02-25 Published:2010-02-09
  • Contact: Shanwu YANG

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摘要：

In order to reveal evolution of rust layer during atmospheric corrosion, commercial weathering steel (WS) 09CuPCrNi and a recently developed bainite WS were subjected to a salt fog test. The protection and compactness of rust layer were evaluated by electrochemical analysis, absorption-desorption test, etc. The experimental results indicate that more compact rust layer could be derived from rust particles with larger size. The well-established notion that the rust particles growth can induce the decrement of corrosion resistance of WS might not be universally accurate. The unusual result means that the rust particles might grow anisotropically during corrosion.

关键词: weathering steel, corrosion, rust particle, coarsening

Abstract:

In order to reveal evolution of the rust layer during atmospheric corrosion, commercial weathering steel (WS) 09CuPCrNi and a recently developed bainite WS were subjected to a salt fog test. The protection and compactness of the rust layer were evaluated by electrochemical analysis, absorption-desorption test, etc. The experimental results indicate that more compact rust layer could be derived from the rust particles with larger size. The well-established notion that the rust particle growth can induce the decrement of corrosion resistance of WS. However, the present investigation shows that the notion might not be universally accurate. The unusual result means that the rust particles might grow anisotropically during corrosion.

Key words: Weathering steel, Corrosion, Rust particle, Coarsening