Effect of organic silicon quaternary ammonium salts on mitigating corrosion of reinforced steel induced by SRB in mild alkaline simulated concrete pore solution  

作　　者：Ini-Ibehe Nabuk Etim Junhua Dong Jie Wei Chen Nan Durga Bhakt Pokharel Aniefiok Joseph Umoh Dake Xu Mingzhong Su Wei Ke 

机构地区：[1]Environmental Corrosion Centre,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China [2]University of Chinese Academy of Sciences 19A Yuquan Road,Shijingshan District,Beijing 100049,China [3]Department of Marine Biology,Akwa Ibom State University,P.M.B.1167,Uyo,Nigeria [4]School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China [5]Sani-care Salon Products,Inc.,USA

出　　处：《Journal of Materials Science & Technology》2021年第5期126-140,共15页材料科学技术（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.51501201)。

摘　　要：The corrosion damage of 20 SiMn steel by sulphate-reducing bacteria(SRB)and the mitigation effect of organic silicon quaternary ammonium salt(OSA)were studied in sterilized mild alkaline simulated concrete pore solution(STR)with different additions of SRB and OSA at pH 9.35 for 28 days.Uniform corrosion occurs in STR medium while slight localized corrosion is observed in STR+OSA medium,and localized pitting corrosion occurs in STR+SRB and STR+SRB+OSA media.The largest pit depth reduces from 36.70μm in STR+SRB medium to 3.31μm in STR+SRB+OSA medium due to the mitigation effect of OSA.The corrosion rate reflected by weight loss and electrochemical impedance spectroscopy(EIS)results presents the order of STR<STR+OSA<STR+SRB+OSA<STR+SRB,which also proves that the presence of SRB can accelerate corrosion in a carbonated medium.However,OSA as an efficient bacteriostatic agent can reduce the excessive growth of SRB and thus reduce corrosion.

关 键 词：Steel reinforced concrete Microbial corrosion BIOCIDE EIS 

分 类 号：TG172[金属学及工艺—金属表面处理]