Desulfovibrio Bizertensis SY-1在阴极极化条件下对X70管线钢的腐蚀行为研究  

Effect of Desulfovibrio Bizertensis SY-1 on Corrosive Behavior of Metal Materials Under Cathodic Polarization

作　　者：裴莹莹 管方[1,3] 董续成 张瑞永 段继周 侯保荣[1] PEI Yingying;GUAN Fang;DONG Xucheng;ZHANG Ruiyong;DUAN Jizhou;HOU Baorong(Key laboratory of Marine Environmental Corrosion and Biofouling,Institute of Oceanology,Chinese Academy of Sciences,Beijing 266071,China;University of Chinese Academy of Science,Beijing 100049,China;Nantong Zhongke Marine Science and Technology R&D Center,Nantong 226333,China)

机构地区：[1]中国科学院海洋研究所海洋环境腐蚀与生物污损重点实验室,青岛266071 [2]中国科学院大学,北京100049 [3]南通中科海洋科学与技术研究发展中心,南通226333

出　　处：《中国腐蚀与防护学报》2024年第2期345-354,共10页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金(42076044);南通市应用基础研究计划项目(JC22022104)。

摘　　要：研究了从浸泡在中国南海的钢铁锈层中分离的腐蚀性硫酸盐还原菌Desulfovibrio bizertensis SY-1在-0.85和-1.05 V vs.SCE阴极极化电位下对X70管线钢腐蚀行为的影响。结果表明,-0.85 V vs.SCE电位尚不能有效抑制Desulfovibrio bizertensis SY-1细胞的生长与附着,同时试片表面也检测到了特征的四方硫铁矿和针铁矿的Raman峰。-1.05 V vs.SCE阴极极化电位能够有效抑制浮游Desulfovibrio bizertensis SY-1细胞的生长和代谢过程,腐蚀产物以磁铁矿为主。失重数据也表明,在-1.05 V vs.SCE电位下试片失重与无菌条件基本一致,且在该电位下最大点蚀坑深度与无极化条件相比减少了75%。该研究为含有Desulfovibrio bizertensis SY-1环境的阴极保护电位选择和微生物与极化电位的相互作用研究提供了参考。The effect of sulfate-reducing bacteria(SRB)strain Desulfovibrio bizertensis SY-1,which isolated from rust scales on steels formed in the South China Sea,on the corrosion behavior of X70 pipeline steel was investigated at different polarized potentials of-0.85 and-1.05 V vs.SCE.The results showed that neither of the planktonic cell growth or the attached cells could not be effectively inhibited at the-0.85 V vs.SCE cathodal polarization potential.The Raman analysis showed that the corrosion product of mackinawite and goethite were both detected by this applied polarization potential.Under the applied polarization potential of-1.05 V vs.SCE,the growth and metabolic process of planktonic D.bizertensis SY-1 cells could be effectively inhibited,and the corrosion products were mainly magnetite.The mass loss data also showed that the mass loss of coupons at the polarization potential of-1.05 V vs.SCE was basically the same as that in the sterile condition,and the maximum pitting depth at this potential was reduced by 75%compared with those in non-polarized condition.The results provide a reference for the selection of cathodic protection potential and the study on the interaction between microorganisms and polarization potential in the environment containing D.bizertensis SY-1.

关 键 词：硫酸盐还原菌 阴极极化 X70 管线钢 微生物腐蚀 

分 类 号：TG174.3[金属学及工艺—金属表面处理]