硫酸盐还原菌对耐微生物腐蚀钢腐蚀行为的影响  

Effect of Sulfate-Reducing Bacteria on Corrosion Behavior of Anti-Microbial Steel

作　　者：游家庆 丁浪勇 刘冉冉 赵春雨 田富全 李衍铖 雷浩然 郭倩倩 江丰 李雅颖 YOU Jiaqing;DING Langyong;LIU Ranran;ZHAO Chunyu;TIAN Fuquan;LI Yancheng;LEI Haoran;GUO Qianqian;JIANG Feng;LI Yaying(Eleventh Oil Production Plants of Changqing Oilfield,Qingyang 745000,China;Xi'an Petroleum University,Xi'an 710065,China)

机构地区：[1]长庆油田分公司第十一采油厂,庆阳745000 [2]西安石油大学材料科学与工程学院,西安710065

出　　处：《腐蚀与防护》2025年第2期14-21,共8页Corrosion & Protection

基　　金：陕西省自然科学基础研究计划(2022JM-269)。

摘　　要：在硫酸盐还原菌(SRB)和CO_(2)共存环境中对耐微生物腐蚀钢进行了浸泡腐蚀试验和电化学试验,并通过扫描电镜(SEM)、能谱(EDS)和X射线衍射(XRD)等观察和分析了腐蚀后试样的腐蚀形貌和腐蚀产物成分。结果表明:SRB和CO_(2)共存时,SRB的存在可抑制CO_(2)腐蚀,且SRB含量越多,均匀腐蚀速率越小,但SRB会促进点蚀的发生和发展;当SRB含量足够多时,试样表面会生成一层致密的具有保护性的Fe S膜,腐蚀速率和点蚀坑尺寸明显减小;随着SRB含量增多,阻抗弧半径增大,耐微生物腐蚀钢的耐蚀性提高,当SRB接种量为0.2%时,阳极反应以活化溶解为主,腐蚀速率受阴极反应控制,当SRB接种量增加到2%和20%时,致密FeS腐蚀产物膜生成,阳极反应受到抑制,腐蚀速率受阳极反应控制。The immersion corrosion test and electrochemical test for microbial corrosion resistant steel were carried out in the coexistence environment of sulfate-reducing bacteria(SRB)and CO2.The corrosion morphology and composition of corrosion products were observed and analyzed by scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS)and X-ray diffraction(XRD).The results show that in the coexistence environment of SRB and CO2,SRB could inhibit the corrosion of CO2,and with the increase of SRB content,the uniform corrosion rate decreased,but SRB improved the occurrence and development of pitting corrosion.When the SRB content was high enough,a dense and protective FeS film formed on the surface of the sample,making the corrosion rate and pit size decrease obviously.With the increase of SRB content,the radius of impedance arc increased,and the corrosion resistance of microbial corrosion resistant steel improved.When the SRB inoculum size was 0.2%,the anodic reaction was dominated by activated dissolution,and the corrosion rate was controlled by the cathodic reaction.When the SRB inoculum size was increased to 2%and 20%,the anodic reaction was inhibited by the dense FeS corrosion product film,so the corrosion rate was controlled by the anodic reaction.

关 键 词：耐微生物腐蚀钢 硫酸盐还原菌(SRB) CO_(2)腐蚀 电化学测试 

分 类 号：TG172.7[金属学及工艺—金属表面处理]