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

金属学报(英文版), 2010, 23(1): 57-62.

^1, , ^2, , ^3, , ^4, , ^5,

1.School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China

2.School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China

3.School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China

4.School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China

5.School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China

基金项目: 国家重点基础研究发展计划(973计划)(2004CB619102)

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

Ming ZHANG ^1, , Shanwu YANG ^2, , Hua ZHENG ^3, , Lili CHI ^4, , Xinlai HE ^5,

1.School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China

2.School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China

3.School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China

4.School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China

5.School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China

Keywords： Weathering steel

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.

参考文献

[1]	Z.F. Wang;P.H. Li;Y. Guan;Q.F. Chen;S.K. Pu .The corrosion resistance of ultra-low carbon bainitic steel[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2009(5):954-961.
[2]	T. Ishikawa;M. Kumagai;A. Yasukawa .Characterization of Rust on Weathering Steel by Gas Adsorption[J].Corrosion: The Journal of Science and Engineering,2001(4):346-352.

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

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