硫酸盐还原菌对A3钢电化学腐蚀行为的影响  

INFLUENCE OF SULPHATE-REDUCING BACTERIA ON CORROSION BEHAVIOR OF A3 CARBON STEEL

作　　者：刘玉秀[1] 刘贵昌[1] 战广深[1] 牛永强[1] 

机构地区：[1]大连理工大学化工学院,大连116012

出　　处：《腐蚀科学与防护技术》2003年第3期141-143,共3页Corrosion Science and Protection Technology

摘　　要：采用交流阻抗技术和动电位扫描法测Tafel曲线技术对A3钢在含不同浓度硫酸盐还原菌介质中且未除氧条件下的电化学特性进行了研究 ,并采用SEM观察试样表面的腐蚀状况 .结果表明 :硫酸盐还原茵可以促进A3钢的阴极去极化和阳极极化 ,Ecorr降低 ;不同菌液浓度中的A3钢的交流阻抗谱图均呈单容抗弧特征 ,极化电阻Rp 随菌液浓度增大而增大 .The electrochemical characteristics of A3 carbon steel in different Sulphate-Reducing Bacteria (SRB) media were studied by measuring Tafel polarization curves and electrochemical impedance spectrum (EIS).It was indicated that in SRB media without removing oxygen the corrosion potential ( E corr ) of A3 carbon steel decreased, the EIS was a single capacitive arc and polarization resistance ( R p) raised with the increase of SRB content.The results also showed that infiuence of SRB on the corrosion process varied with the qualities of biofilms.

关 键 词：硫酸盐还原菌 A3钢 电化学腐蚀 极化 交流阻抗 SEM 

分 类 号：TG172.7[金属学及工艺—金属表面处理] TG174.36[金属学及工艺—金属学]