Effect of Small Content of Chromium on Wet–Dry Acid Corrosion Behavior of Low Alloy Steel
来源期刊：Acta Metallurgica Sinica2017年第2期
论文作者：Qing-He Zhao Wei Liu Yi-Chun Zhu Bin-Li Zhang Shuan-Zhu Li Min-Xu Lu
文章页码：164 - 175
摘 要：Effect of small content of chromium（Cr） on wet–dry acid corrosion behavior of low alloy steels has been investigated.The results show that the corrosion resistance of the steels increased with increasing Cr content from 0.10 to0.50 wt%.Higher content of Cr promotes initial corrosion and accelerates the formation of dense and protective rust in long-term corrosion.The enhanced protectiveness of the rust is closely related to its composition.High content of Cr increases the content of amorphous phases and decreases the content of c-Fe OOH in the rust,resulting in the high compactness of the rust and low electrochemical activity in acid condition.Cr dopes in rust and depresses the transformation from amorphous phases to a-Fe OOH,as well as the growth process of Fe OOH particles,which is responsible for the enhanced compactness of rust in long-term corrosion.
Qing-He Zhao，Wei Liu，Yi-Chun Zhu，Bin-Li Zhang，Shuan-Zhu Li，Min-Xu Lu
Institute for Advanced Materials and Technology,University of Science and Technology Beijing
摘 要：Effect of small content of chromium（Cr） on wet–dry acid corrosion behavior of low alloy steels has been investigated.The results show that the corrosion resistance of the steels increased with increasing Cr content from 0.10 to0.50 wt%.Higher content of Cr promotes initial corrosion and accelerates the formation of dense and protective rust in long-term corrosion.The enhanced protectiveness of the rust is closely related to its composition.High content of Cr increases the content of amorphous phases and decreases the content of c-Fe OOH in the rust,resulting in the high compactness of the rust and low electrochemical activity in acid condition.Cr dopes in rust and depresses the transformation from amorphous phases to a-Fe OOH,as well as the growth process of Fe OOH particles,which is responsible for the enhanced compactness of rust in long-term corrosion.
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