The effects of different contents of rare earth (RE) elements Ce and La on the corrosion behavior of weathering steel Q355NHq were investigated with alternate immersion tests and electrochemical measurements. The corrosion rates were lowest with the rusted steels containing 170 ppm RE elements. Aspex analysis showed that steels with the RE elements content of 170 ppm had the greatest percentage of inclusions with high content of RE elements. The immersion tests showed that modified inclusions with a high percentage of (RE)xOy exhibited a better corrosion resistance than CaS-Al2O3 inclusion. Compared with steels containing no more than 90 ppm RE, the rust layers of steels containing 170 ppm RE elements were compact and contained high amounts of α-FeOOH and low amounts of γ-FeOOH. Based on the results obtained, the influence of the different contents of RE elements in weathering steel corrosion is discussed.
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1 May 2022
Research Article|
March 23 2022
Corrosion Behavior of Weathering Steels with Different Contents of Rare Earth Elements La and Ce
Ruiqian Wang;
Ruiqian Wang
*School of Materials Science and Engineering, Shanghai University, Shanghai, China 200444.
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Long Chen;
Long Chen
*School of Materials Science and Engineering, Shanghai University, Shanghai, China 200444.
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Jianguo Zhi;
Jianguo Zhi
**Inner Mongolia Baotou Steel Union Co., Ltd., Baotou, Nei Mongolia, China 014010.
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Xintong Lian;
Xintong Lian
*School of Materials Science and Engineering, Shanghai University, Shanghai, China 200444.
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Liya Guo;
Liya Guo
‡
*School of Materials Science and Engineering, Shanghai University, Shanghai, China 200444.
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Online ISSN: 1938-159X
Print ISSN: 0010-9312
© 2022, AMPP
2022
CORROSION (2022) 78 (5): 437–448.
Citation
Ruiqian Wang, Long Chen, Jianguo Zhi, Xintong Lian, Liya Guo, Han Dong; Corrosion Behavior of Weathering Steels with Different Contents of Rare Earth Elements La and Ce. CORROSION 1 May 2022; 78 (5): 437–448. https://doi.org/10.5006/4002
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