Q235钢焊接熔合区在混合菌共同作用下的腐蚀行为  

Corrosion Behavior of Q235 Steel Fusion Zone under the Combination Action of Mixed Bacteria

作　　者：顾彩香[1] 李双明[1] 尹衍升 杜兴华[1] 

机构地区：[1]上海海事大学商船学院,上海201306 [2]上海海事大学海洋材料科学与工程研究院,上海201306

出　　处：《船舶工程》2013年第2期76-79,107,共5页Ship Engineering

基　　金：国家海洋局科研项目(201005028-4);上海市科学技术委员会科研计划项目(10170502400);上海市教委重点学科建设项目(J50603);上海海事大学研究生创新基金项目(yc2012039;yc2009110)

摘　　要：通过观察腐蚀形貌,测量极化曲线和阻抗谱,研究了Q235钢熔合区在SRB和V.natriegens共同作用下的腐蚀行为。研究表明,熔合区的腐蚀程度,单一菌溶液中,SRB大于V.natriegens,混合菌溶液大于单一菌;混合菌溶液中SRB和V.natriegens表现出协同作用,加速试样的腐蚀;试样的耐腐蚀性能,熔合区小于焊缝区小于母材区。The corrosion behavior ofQ235 steel fusion zone exposed in the mixed bacteria medium （SRB and V.natriegens） through different culture cycle was investigated by corrosion morphology, polarization curves and electrochemical impedance spectra. It was found that the extent of corrosion in SRB medium was stronger than in V.natriegens medium, while that in mixed bacteria medium was stronger than in single bacterium medium; The sample corrosion was accelerated as a result of the synergism displayed by the mixed bacteria; The corrosion resistance of fhsion zone was weaker than weld zone, and that of weld zone was weaker than that of metal zone.

关 键 词：Q235钢 熔合区 硫酸盐还原菌 需钠弧菌 电化学行为 

分 类 号：TG172.51[金属学及工艺—金属表面处理] U672.72[金属学及工艺—金属学]