A Comparative Study of the Effects of Sulfate Reducing Bacteria on Corrosion of Carbon Steel Q235 under Simulated Disbonded Coating with Different Width of Aperture
The effect of sulfate reducing bacteria (SRB) on the corrosion of Q235 steel has been investigated in the crevice under the simulated disbonded coating with aperture width of 1.0 and 0.5mm in the soil-extract solutions (SES) by using electrochemical methods.The results show that the existence of SRB in SES can cause corrosion potential of the working electrode to shift to a more negative value,and the formation of pitting on the surface of the electrode.Compared with the crevice width of 1.0mm,the corrosion potential of the electrode shows a little more positive at the crevice width of 0.5mm.The corrosion rate of the electrode increases with the increase of aperture width in the SES without SRB,however,decreases with the increase of aperture width in the SES with SRB.The results obtained indicate that either bio-film on the surface of the electrode formed by SRB in SES or aperture width has obvious influences on the crevice corrosion process of the carbon steel.
Corrosion potential Soil leaching solution Crevice corrosion EIS
Ping Zhao Jiaxing Yang Pengpeng Zhu Cheng Sun Jin XU
School of Environmental & Chemical Engineering,Shenyang Ligong University,Shenyang,110159,China Institute of Metal Research,Chinese Academy of Sciences,Shenyang,110015,China
国际会议
西安
英文
247-250
2012-06-12（万方平台首次上网日期，不代表论文的发表时间）