Enhanced Bio-corrosion Resistance by Cu Alloying in a Micro-alloyed Pipeline Steel

作     者：Yunpeng Zeng Wei Yan Xianbo Shi Maocheng Yan Yiyin Shan Ke Yang Yunpeng Zeng;Wei Yan;Xianbo Shi;Maocheng Yan;Yiyin Shan;Ke Yang

作者机构：School of Materials Science and EngineeringUniversity of Science and Technology of ChinaShenyang110016China Shi-Changxu Innovation Center for Advanced MaterialsInstitute of Metal ResearchChinese Academy of SciencesShenyang110016China CAS Key Laboratory of Nuclear Materials and Safety AssessmentInstitute of Metal ResearchChinese Academy of SciencesShenyang110016China 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2022年第35卷第10期

页      面：1731-1743页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0806[工学-冶金工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financially supported by the National Natural Science Foundation of China(No.52071320) the enterprise cooperation project of"development of MIC resistance pipeline steel"by Anshan Iron and Steel Group Corporation,China. 

主　　题：Pipeline steel Mechanical property Microbiologically influenced corrosion Cu alloyed steel Corrosion mechanism Sulfate-reducing bacteria(SRB) 

摘      要：On the composition base of commercial X65 grade pipeline steels,a Cu modified pipeline steel was designed to show improved resistance to microbially induced corrosion(MIC).The mechanical properties of the Cu-added steel and its corrosion behavior in a soil solution inoculated with sulfate-reducing bacteria(SRB)were investigated in this work.The results demonstrated that Cu-added steel exhibits a good combination of strength and toughness.Cu ions released from the Cu-added steel could effectively kill the SRB attaching on the steel surface,thus evidently decreased the pit depth and diameter of Cu-added steel.Furthermore,during the long-term immersion,the Cu-rich film formed by the enrichment of Cu in the corrosion product layer on the steel surface could also contribute to the improvement of the bio-corrosion resistance of Cu-added steel.