Microbiologically Induced Corrosion of X80 Pipeline Steel in a Near-Neutral pH Soil Solution  

作　　者：Tang-Qing Wu Mao-Cheng Yan De-Chun Zeng Jin Xu Chang-Kun Yu Cheng Sun Wei Ke 

机构地区：[1]Environmental Corrosion Center, Institute of Metal Research,Chinese Academy of Sciences [2]School of Materials Science and Engineering, Xiangtan University [3]Oil–Gas Storage and Transportation Company of Xinjiang Oilfield Branch

出　　处：《Acta Metallurgica Sinica(English Letters)》2015年第1期93-102,共10页金属学报（英文版）

基　　金：financial support of the National Natural Science Foundation of China(Grant Nos.51471176 and 51161001);National RD Infrastructure and Facility Development Program of China(Grant No.2005DKA10400CT-2-02)

摘　　要：MIC of X80 pipeline steel in a near-neutral pH soil solution in the presence and absence of sulfate-reducing bacteria（SRB） was monitored by electrochemical techniques and microbiological tests. The results show that soil solution is more close to the complex soil environment around pipeline. The activity of SRB leads to the shift of the phase response to low frequency, the decrease of electrolyte resistance and the alteration of dielectric constant of the film. Both the activity and metabolite of SRB influence the corrosion behavior of the steel. The steel surface undergoes localized attack in the SRB-inoculated soil solution, whereas only slight uniform corrosion occurs in the sterile soil solution.MIC of X80 pipeline steel in a near-neutral pH soil solution in the presence and absence of sulfate-reducing bacteria（SRB） was monitored by electrochemical techniques and microbiological tests. The results show that soil solution is more close to the complex soil environment around pipeline. The activity of SRB leads to the shift of the phase response to low frequency, the decrease of electrolyte resistance and the alteration of dielectric constant of the film. Both the activity and metabolite of SRB influence the corrosion behavior of the steel. The steel surface undergoes localized attack in the SRB-inoculated soil solution, whereas only slight uniform corrosion occurs in the sterile soil solution.

关 键 词：Sulfate-reducing bacteria Pipeline steel X80 Electrochemical impedance spectroscopy（EIS） Scanning electron microscopy 

分 类 号：TG172.7[金属学及工艺—金属表面处理]