利用交流阻抗测试技术、扫描电镜及表面能谱分析、失重法、微生物分析等方法，研究了在同一类型不同Cl-含量的土壤中，硫酸盐还原菌对Q235钢腐蚀的影响规律.136天的试验结果表明：随着土壤中Cl-含量的增大，Q235钢腐蚀速率也增大，当Cl-含量增大到0.5%时，腐蚀速率达到最大；随后腐蚀速率随着土壤中Cl-含量的增大而减小，当土壤中Cl-含量高于1%时，接菌土壤与灭菌土壤中Q235钢腐蚀速率相差不大.在土壤中Cl-含量低于1%时，接菌土壤中Q235钢腐蚀速率明显大于灭菌土壤的腐蚀速率；点蚀速率在不同Cl-含量的土壤中的变化规律与腐蚀速率的变化有所不同，点蚀速率基本随着土壤中Cl-含量的增加而增大.而且接菌土壤中的点蚀速率大于灭菌土壤的点蚀速率. TG174.5 硫酸盐还原菌； 含Cl-土壤； Q235钢； 微生物腐蚀 2003-01-13 2003-05-08
EFFECTS OF SRB ON CORROSION OF Q235 STEEL IN Cl- CONTAINING SOILS ZHOU Shu-feng(1),YIN Xiu-feng(1),ZHOU Wei-guo(2),SUN Cheng(3),HAN An-hou(3) 1； 2； 3State Key Lab. for Corrosion and Protection,Institute of Metals Research, Chinese Academy of Sciences The effects of Sulfate Reducing Bacterial (SRB) on corrosion of Q235 steel in soils containing Cl- have been studied.Bacterial analyses,weight loss,Electrochemical Impedance Spectroscopy,Scanning Electron Microscopy (SEM) and EDXA were used.The results shown that corrosion rate and pitting rate of Q235 steel in soils with different Cl- content and SRB are larger than those without SRB.Corrosion rate and pitting rate of Q235 steel increase with the increasing Cl- content of soils and reaches the peak during 0.5% Cl- content of soils,then decrease with funther increasing Cl- content in soils. SRB; soils containing Cl-Q235 steel; microbially influenced corrosion
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