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Distinct beneficial effect of Sn on the corrosion resistance of Cr–Mo low alloy steel
Journal of Materials Science & Technology ( IF 10.9 ) Pub Date : 2021-01-16 , DOI: 10.1016/j.jmst.2020.12.014
Meihui Sun , Xiaojia Yang , Cuiwei Du , Zhiyong Liu , Yong Li , Yumin Wu , Hongyu San , Xiandong Su , Xiaogang Li

In this work, the beneficial effect of Sn addition on the corrosion resistance mechanism of Cr–Mo low alloy steel was studied. Results demonstrated that Sn improves the corrosion resistance of the steel matrix mainly by influencing the microstructural transformation. Sn addition and the synergistic effect of Sn, Cr, and Mo promote the formation of α-FeOOH, SnO2, SnO, Cr(OH)3, and molybdates, lead to the improved protection and stability of the rust layer. This synergistic effect also endows the inner rust layer with cation selectivity, preventing the further penetration of Cl- and inhibiting the localized corrosion of steel.



中文翻译:

Sn对Cr-Mo低合金钢的耐蚀性有明显的有益作用

在这项工作中,研究了添加锡对Cr-Mo低合金钢的抗腐蚀机理的有益作用。结果表明,Sn主要通过影响组织转变来提高钢基体的耐腐蚀性。锡的添加和锡,铬和钼的协同作用促进了α-FeO​​OH,SnO 2,SnO,Cr(OH)3和钼酸盐的形成,从而提高了防锈层的保护性和稳定性。这种协同作用还使内部防锈层具有阳离子选择性,从而防止了Cl-的进一步渗透并抑制了钢的局部腐蚀。

更新日期:2021-01-18
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