National Materials Corrosion and Protection Data Center, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China; BRI Southeast Asia Network for Corrosion and Protection (MOE), Shunde Graduate School of University of Science and Technology Beijing, Foshan, Guangdong 528000, China.
State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment Materials, CNPC Tubular Goods Research Institute, Xi'an, Shaanxi 710077, China.
Bioelectrochemistry. 2021 Aug;140:107746. doi: 10.1016/j.bioelechem.2021.107746. Epub 2021 Jan 26.
The influence of NaCl concentration on microbiologically influenced corrosion (MIC) of Q235 carbon steel by the halophilic archaeon Natronorubrum tibetense was investigated by immersion tests and electrochemical measurements. An increase in NaCl concentration from 0 g/mL to 0.1 g/mL promoted the anodic dissolution of carbon steel and accelerated its corrosion, but MIC did not occur. A further increase in NaCl concentration to 0.2 g/mL led to MIC in inoculated medium, and the occurrence of the MIC resulted in further aggravation of carbon steel corrosion. Once the NaCl concentration reached 0.3 g/mL, the high concentration of chloride ions greatly interfered with the adsorption of dissolved oxygen and the attachment of N. tibetense cells to the surface of carbon steel, thus reducing the corrosion rate of carbon steel and inhibiting the MIC.
通过浸泡试验和电化学测量研究了 NaCl 浓度对嗜盐古菌 Natronorubrum tibetense 引起的 Q235 碳钢微生物影响腐蚀（MIC）的影响。NaCl 浓度从 0 g/mL 增加到 0.1 g/mL 促进了碳钢的阳极溶解并加速了其腐蚀，但没有发生 MIC。进一步将 NaCl 浓度增加到 0.2 g/mL 导致接种培养基中发生 MIC，MIC 的发生进一步加剧了碳钢的腐蚀。一旦 NaCl 浓度达到 0.3 g/mL，高浓度的氯离子会极大地干扰溶解氧的吸附和 N. tibetense 细胞在碳钢表面的附着，从而降低碳钢的腐蚀速率并抑制 MIC。
