Mechanistic diversity between nitrate and nitrite on biocorrosion of X80 pipeline steel caused by Desulfovibrio desulfurican and Pseudomonas stutzeri
Mechanistic diversity between nitrate and nitrite on biocorrosion of X80 pipeline steel caused by Desulfovibrio desulfurican and Pseudomonas stutzeri
复制标题
硝酸盐和亚硝酸盐对脱硫弧菌和施氏假单胞菌引起的X80管线钢生物腐蚀的机理差异
DOI：
10.1016/j.corsci.2022.110573
复制
发表时间：
2022-10-01
影响因子：
8.3
通讯作者：
Sun, Cheng
中科院分区：
文献类型：
--
作者：
Fu, Qi;Xu, Jin;Sun, Cheng
研究了脱硫脱硫弧菌（D. desulfurican）和施氏假单胞菌（P. Stutzeri）对不同硝酸盐和亚硝酸盐浓度下X80管线钢生物腐蚀的影响。硝酸盐和亚硝酸盐处理后，D. desulfurican细胞数量迅速减少，且亚硝酸盐的抑制作用更显着。然而，经硝酸盐处理的样品遭受了严重的点蚀，而经亚硝酸盐处理的样品表面形成了γ-Fe2O3钝化膜，阻碍了蚀坑的形成。此外，亚硝酸盐还导致FeS含量显着降低，有利于减少腐蚀。
The effects of Desulfovibrio desulfurican (D. desulfurican) and Pseudomonas stutzeri (P. stutzeri) on the biocorrosion of X80 pipeline steel for different nitrate and nitrite concentrations were studied. After treatment with nitrate and nitrite, the number of D. desulfurican cells decreased rapidly, and the inhibition effect of nitrite was more significant. However, the samples treated with nitrate suffered serious pitting corrosion, while the surface of the samples treated with nitrite formed gamma-Fe2O3 passivation films, which hindered the formation of erosion pits. Furthermore, nitrite also resulted in a significant decrease in the content of FeS, which was helpful to reduce corrosion.