复配杀菌缓蚀剂对N80钢在SRB环境中微生物腐蚀行为的影响

胥聪敏, 李雪丽, 付安庆, 孙姝雯, 陈志强, 李城臣

Effect of Compound Bactericidal Corrosion Inhibitor on Corrosion Behavior of N80 Steel at Different Temperatures

XU Congmin, LI Xueli, FU Anqing, SUN Shuwen, CHEN Zhiqiang, LI Chengchen

表3 N80在不同温度SRB溶液中腐蚀14 d的EIS拟合结果

Table 3 EIS fitting results of 14 d corrosion of N80 in SRB solution at different temperatures

Temperature Rs Yf nf Rf Ydl ndl Rct W Equivalent circuit Without adding compound bactericidal corrosion inhibitor 20 oC 16.24 6.14 × 10-3 1.00 42.19 7.716 × 10-2 0.977 756.3 - Fig.4a 37 oC 16.36 9.30 × 10-2 0.95 361.9 1.054 × 10-2 0.69 9.43 - Fig.4a 50 oC 10.08 5.16 × 10-4 1.00 447.9 4.689 × 10-4 1.00 307.4 - Fig.4a Adding compound bactericidal corrosion inhibitor 20 oC 19.81 2.98 × 10-3 1.00 192.3 1.256 × 10-3 0.87 2960 - Fig.4a 37 oC 19.76 1.69 × 10-3 1.00 9937 2.50 × 10-3 0.86 10.11 - Fig.4a 50 oC 19.13 6.42 × 10-4 0.91 482.2 1.747 × 10-3 0.88 50.36 3.75 × 10-3 Fig.4b