摘要
利用极化曲线,电化学阻抗谱,扫描电镜,能谱分析和微生物分析等方法对X60钢在灭菌培养基和接种硫酸盐还原菌(SRB)培养基中浸泡2 h和浸泡240 h后的腐蚀行为进行了对比研究。结果表明:浸入初期,相比灭菌介质,含SRB介质中X60钢表面上SRB的初始吸附成膜具有一定的保护作用,这使其耐蚀性能有所提高。浸泡2 h后,SRB菌落代谢过程的阴极去极化作用使X60钢表面产生明显点蚀形貌,加速了X60钢的腐蚀,使其耐蚀性能下降。
The corrosion behavior of X60 steel in the culture media with and without sulfate -reducing bacteria （SRB） was investigated by polarization curve method, electrochemical impedance spectroscopy（ EIS）, scanning electron microscopy （SEM）, energy dispersive spectroscopy （EDS）, and microorganism analysis method. The results showed that SRB biofilm forming on the surface of X60 steel improves its corrosion resistance a little after the initial soaking for 2 h. After soaking time for 240 h in the culture medium with SRB, pitting corrosion appears and develops due to the catholic depolarization function of SRB on the surface of X60 steel.
出处
《装备环境工程》
CAS
2007年第3期53-57,共5页
Equipment Environmental Engineering
关键词
硫酸盐还原菌
X60钢
微生物腐蚀
浸泡时间
点蚀
sulfate-reducing bacteria （SRB）
X60 steel
microbial corrosion
soaking time
pitting corrosion
