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. SRB对腐蚀的影响作用与生成的生物膜的致密程 度有关.
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 (Ecorr) of A3 carbon steel decreased, the EIS was asingle capacitive arc and polarization resistance (Rp) 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.
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