The effects of sulfate reducing bacteria on corrosion of carbon steel Q235 under simulated disbonded coating by using electrochemical impedance spectroscopy |
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| Authors: | Jin Xu Kaixiong Wang Cheng Sun Fuhui Wang Ximing Li Jiaxing Yang Changkun Yu |
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| Affiliation: | aState Key Laboratory for Corrosion and Protection, Institute of Metals Research, Chinese Academy of Sciences, Shenyang 110016, China;bOil-Gas Storage and Transportation Company of Xinjiang Oilfield, Kalamayi 834002, China;cSchool of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang 110159, China |
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| Abstract: | The effect of sulfate reducing bacteria (SRB) on the corrosion of the carbon steel Q235 has been investigated in the crevice under the simulated disbonded coating in the soil-extract solutions (SES). The results of electrochemical impedance spectroscopy (EIS) show that the corrosion rate is inhibited in the SES with SRB during the stationary phase of SRB, but enhanced during the death phase. The comparison of the polarization (Rp) and the charge transfer resistances (Rt) has indicated that the biofilm seriously influences the reactive procedure of metal/solution interface. SRB is found in the pits on the surface of the steel. |
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| Keywords: | A Steel B EIS B SEM C Pitting corrosion |
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