Distinct beneficial effect of Sn on the corrosion resistance of Cr-Mo low alloy steel  

作　　者：Meihui Sun Xiaojia Yang Cuiwei Du Zhiyong Liu Yong Li Yumin Wu Hongyu San Xiandong Su Xiaogang Li 

机构地区：[1]Beijing Advanced Innovation Center for Materials Genome Engineering,University of Science and Technology Beijing,Beijing,100083,China [2]National Materials Corrosion and Protection Scientific Data Center,Institute of Advanced Materials and Technology,Beijing,100083,China [3]State Key Laboratory of Metal Material for Marine Equipment and Application,Anshan,114009,China [4]College of Materials Science and Engineering,Chongqing University,Chongqing 400045,China

出　　处：《Journal of Materials Science & Technology》2021年第22期175-189,共15页材料科学技术（英文版）

基　　金：This work was supported by National Key R&D Program of China(2017YFB0702100);the Fundamental Research Funds for the Central Universities(No.FRF-MP-18-002)。

摘　　要：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,SnO_(2),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.

关 键 词：Sn addition Low alloy steel SKPFM TEM Corrosion resistance 

分 类 号：TG142.33[一般工业技术—材料科学与工程]