硫酸盐还原菌的含硫代谢产物在加速碳钢腐蚀中的作用  

Roles of Sulfur-containing Metabolites by SRB in Accelerating Corrosion of Carbon Steel

作　　者：李付绍[1] 安茂忠[1] 刘光洲[2] 段东霞[2] 

机构地区：[1]哈尔滨工业大学化工学院,哈尔滨150001 [2]海洋腐蚀与防护国防科技重点实验室,青岛266071

出　　处：《无机化学学报》2009年第1期13-18,共6页Chinese Journal of Inorganic Chemistry

基　　金：青岛市科技局项目(No.YK010403)基金资助

摘　　要：应用电化学阻抗谱(EIS)研究了硫酸盐还原菌(SRB)对碳钢腐蚀过程的促进作用,应用稳态极化法研究了SRB代谢硫化物对碳钢阳极活性溶解的增强作用。研究结果表明,代谢硫化物通过对铁的吸附增强了碳钢阳极活性溶解,因为依据吸附态E-pH图可知,在很宽的电位范围和pH值范围内,硫在铁上都能以稳定的吸附态存在。吸附态硫提升了碳钢表面铁原子能量,使铁阳极溶解所需活化能降低,从而增强其阳极溶出过程。Effects of sulfate-reducing bacteria（SRB） activities on the acceleration of corrosion of carbon steel were studied by EIS and the role of sulfur-containing metabolites by SRB in enhancing the anodic active dissolution of carbon steel was investigated by steady-state polarization technique. The results show that sulfur-containing metabolites in the form of adsorbed sulfur on iron enhance the anodic active dissolution of carbon steel. The adsorbed sulfur raises the energy of surface iron atoms of carbon steel, reduces the necessary activation energy for their dissolution from metal matrix and thus enhancing the anodic active dissolution.

关 键 词：硫酸盐还原菌 EIS 阳极活性溶解 吸附态E-pH图 Tafel斜率 

分 类 号：O614.811[理学—无机化学] O646[理学—化学]