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采用表面分析技术、失重法和电化学测试技术研究了Q235钢在氧化硫硫杆菌(T.t,Thiobacillus thiooxidans)和芽孢杆菌(Bacillus)协同作用下的腐蚀行为.扫描电镜结果表明,与单菌体系相比,混菌体系会形成最为致密的生物膜;混菌体系中浸泡的试样表面会出现不同于单菌体系的圆形蚀坑.腐蚀失重结果表明,混菌中试样的腐蚀速率介于2个单菌体系之间.交流阻抗结果表明,混菌体系浸泡2天后试样表面出现2个时间常数,表面膜层电阻经历了先增大后减小的过程.
The corrosion behavior of Q235 steel under the synergistic action of Tt and Bacillus was studied by surface analysis, weight loss method and electrochemical test.The results of scanning electron microscopy showed that the corrosion of Q235 steel with single bacteria system Compared with the mixed system will form the most compact biofilm; mixed system immersed in the sample surface will appear different from the single-bacteria circular pits. Corrosion loss results show that the mixed sample corrosion rate between The results of AC impedance show that there are two time constants on the surface of the sample after soaked for 2 days in the mixed system, and the resistance of the surface coating first increases and then decreases.