海水中硫酸盐还原菌作用下Q235钢表面腐蚀产物的形成和转化  

FORMATION AND TRANSFORMATION OF SURFACE CORROSION PRODUCTS OF Q235 STEEL INFLUENCED BY SULFATE-REDUCING BACTERIA IN SEAWATER

作　　者：赵晓栋[1] 段继周[2] 武素茹[3] 侯保荣[2] 

机构地区：[1]浙江海洋学院机电工程学院,舟山316000 [2]中国科学院海洋研究所,青岛266071 [3]中国海洋大学化学化工学院,青岛266003

出　　处：《中国腐蚀与防护学报》2008年第5期299-302,共4页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金项目(40406022);中国科学院知识创新工程重要方向项目(KZCX2-YW-210);浙江海洋学院重点项目(21185002508;21185010908)资助

摘　　要：用扫描电镜、电子探针、透射电镜及能谱仪等分析手段,研究了Q235钢在含有硫酸盐还原菌的海水中表面腐蚀产物的形成和转化。研究表明,硫酸盐还原菌首先在钢表面附着,随着细菌生命代谢活动的进行,最初的腐蚀产物由球形的(水合)氧化铁转化为海绵状的球形铁硫化物。腐蚀产物中存在FeS单晶。The formation and transformation of corrosion products on the surface of Q235 steel in seawater containing sulfate-reducing bacteria（SRB） was studied by scanning electron microscopy （SEM）, electron probe microanalyzer（EPMA）, transmission electron microscopy （TEM） and energy dispersive X-ray detector（EDX）. SEM observation showed the attachment of SRB on the steel surface in the initial stage of the corrosion process. EPMA results indicated that influenced by the metabolic activities of SRB, the original corrosion products, ferric （oxyhydr） oxide, transformed to spongy globules of iron sulphide. The presence of single crystalline FeS in the corrosion products was identified by TEM electron diffraction pattern and EDX composition analysis.

关 键 词：微生物腐蚀 硫酸盐还原菌 腐蚀产物 电子探针 

分 类 号：TG172.5[金属学及工艺—金属表面处理]