硫酸盐还原菌的生长过程及其对D36钢海水腐蚀行为的影响  

Effects of Growing Sulfate-reducing Bacteria on Corrosion Behaviour of D36 Steel in Seawater

作　　者：匡飞[1] 王佳[2] 张盾[1] 李永娟[1] 万逸[1] 刘怀群[1] 

机构地区：[1]中国科学院海洋研究所 [2]中国海洋大学,山东青岛266003

出　　处：《材料开发与应用》2008年第3期49-52,共4页Development and Application of Materials

基　　金：中国科学院创新工程重要方向项目(KACX2-YW210)资助.

摘　　要：通过测定海水中硫酸盐还原菌(SRB)的生长曲线及其不同生长阶段的硫离子浓度、D36钢电极体系的氧化还原电位、自腐蚀电位、极化曲线和电化学阻抗谱,研究了硫酸盐还原菌对该体系钢电极腐蚀行为的影响。结果表明,海水中D36钢氧化还原电位和自腐蚀电位主要由体系中硫酸盐还原菌代谢产物硫离子的浓度所决定;体系的阳极和阴极反应速率均在硫酸盐还原菌增殖期增加,而且阳极反应速率衰亡期和残余期保持不变。Influences of growing process of sulfate-reducing bacteria （SRB） in seawater system on the corrosion behaviour of D36 steel were studied by detection of sulfide concentration, redox potential, corrosion potential, polarization curves and electrochemical impedance spectroscopy analysis. The results indicate that the redox potential and corrosion potential of the D36 steel do not depend on the number of active SRB, but on the accumulation of metabolism products of SRB. The anodic and cathodic reaction rate increased in the expotential stage of SRB growth and anodic reaction rate kept almost constant in the death and residual stages.

关 键 词：硫酸盐还原菌 海水 D36钢 腐蚀行为 

分 类 号：TG172[金属学及工艺—金属表面处理]