Abstract
Sulfate-reducing bacteria (SRB) corrosion of X80 pipeline steel welded joints has been investigated. The larger diameter, deeper depth and higher density of the corrosion pits were detected in the heating affected zone (HAZ) than in the base metal (BM) and weld zone (WZ) in the sterile medium. However, in the inoculated medium, Desulfovibrio desulfuricans (D. desulfuricans) tended to attach primarily to the BM and WZ, and increased their local corrosion sensibilities. D. desulfuricans disliked to attach to the HAZ surface and only non-uniform corrosion dominated on the surface, which was an important phenomenon in D. desulfuricans corrosion of pipeline steel.
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