Crevice corrosion of X80 carbon steel in simulated seawater with the presence of SRB was studied by surface analysis and electrochemical measurements. The electrode inside crevice was seriously corroded. Large amount of corrosion products accumulated along the crevice mouth. Galvanic current densities measurements confirmed that there was a galvanic effect between the carbon steel at the crevice interior and exterior during the crevice corrosion. The difference in the sessile SRB cells quantities and SRB biofilms developments inside and outside crevice caused the galvanic effect between the carbon steel inside and outside the crevice, which further induced crevice corrosion. Increased crevice width reduced the galvanic effect, resulting in less crevice corrosion in wider crevice.

通过表面分析和电化学测量研究了 X80 碳钢在 SRB 存在下模拟海水中的缝隙腐蚀。缝隙内的电极腐蚀严重。沿缝隙口积聚大量腐蚀产物。电流密度测量证实，在缝隙腐蚀期间，缝隙内部和外部的碳钢之间存在电流效应。固着SRB细胞数量和缝隙内外SRB生物膜发育的差异导致缝隙内外碳钢之间的电化效应，进一步诱发缝隙腐蚀。缝隙宽度的增加会降低电偶效应，从而在较宽的缝隙中减少缝隙腐蚀。