pH值对X70钢在海泥模拟溶液中微生物腐蚀行为的影响

李鑫,陈旭,宋武琦,杨佳星,吴明

Effect of pH Value on Microbial Corrosion Behavior of X70 Steel in a Sea Mud Extract Simulated Solution

Xin LI,Xu CHEN,Wuqi SONG,Jiaxing YANG,Ming WU

表1 X70钢在含有SRB的不同pH值南海海泥模拟溶液中EIS等效电路拟合结果

Table 1 Fitting data of EIS of X70 steel after immersion in the South China Sea mud simulation solutions containing SRB at different pH values

pH Time / d Rs/ Ω·cm2 Qf/ 10-4F·cm-2 n1 Rf/ Ω·cm2 Qdl/ 10-4F·cm-2 n2 Rct/ Ω·cm2 6 4 15.89 5.847 0.9053 6.886 14.180 0.9355 4851 7 15.23 51.37 0.9082 17.690 50.970 0.9718 4280 10 15.93 115.3 --- 230.300 70.950 --- 3648 14 15.23 6.323 --- 9.846 38.830 0.9578 4398 8 4 16.31 11.47 0.9090 1371 3.808 --- 1417 7 15.30 69.19 0.8278 7.210 58.450 0.8681 1309 10 14.99 275.3 --- 18.450 332.800 --- 1270 14 17.21 99.94 --- 9.720 162.7 --- 2455 10 4 15.11 58.48 0.8911 3177 16.710 1.0000 2451 7 14.43 74.79 0.8738 25.920 53.950 0.9668 4339 10 15.11 12.46 --- 2.428 64.870 0.7764 5931 14 14.36 38.83 0.8235 16.050 16.260 1.0000 4542