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.
出处
《中国腐蚀与防护学报》
CAS
CSCD
北大核心
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
关键词
微生物腐蚀
硫酸盐还原菌
腐蚀产物
电子探针
microbiologically influenced corrosion, SRB, corrosion product, EPMA
