Under-deposit microbial corrosion of X65 pipeline steel in the simulated shale gas production environment
Under-deposit microbial corrosion of X65 pipeline steel in the simulated shale gas production environment
复制标题
模拟页岩气生产环境下X65管线钢的沉积微生物腐蚀
DOI：
10.1016/j.ijoes.2023.100069
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发表时间：
2023-02-28
影响因子：
1.5
通讯作者：
Li, Xuanpeng
中科院分区：
文献类型：
--
作者：
Liao, Wenzhi;Yuan, Juntao;Li, Xuanpeng
通过失重试验、电化学阻抗谱、扫描电子显微镜和能谱分析等手段，在模拟页岩气生产环境中研究了泥沙沉积和硫酸盐还原菌对X65管线钢的协同作用。结果表明，结砂和硫酸盐还原菌的共存使均匀腐蚀减少了63%，局部腐蚀速度增加了183%。EIS结果表明，生物膜的形成改变了表面混合层的保护性，并呈现出与细菌生长曲线相关的趋势。从横截面形貌和能谱分析中也明确了混合层的存在。这种混合层可能会阻碍物质向镀层/钢界面的扩散，从而在镀层/钢界面形成促进局部腐蚀的微环境。
The synergistic effect of sand deposit and sulfate-reducing bacteria on the X65 pipeline steel was investigated in the simulated shale gas production environment, by means of weight loss tests, EIS, SEM and EDS. The results indicated that the coexistence of sand deposit and sulfate reducing bacteria (SRB) resulted in 63% reduction in uniform corrosion, but 183% increase in localized corrosion rate. The EIS results revealed that the formation of biofilm altered the protectiveness of the surface mixed layer and showed a trend related to the bacterial growth curve. The mixed layer was also clarified from the cross-section morphology and EDS analysis. This mixed layer may hinder the diffusion of substances to the deposit/steel interface, thus creating a microenvironment at the deposit/steel interface that promotes localized corrosion.