硫脲基咪唑啉季铵盐缓蚀剂对X80管线钢腐蚀的影响

白云龙, 沈国良, 覃清钰, 韦博鑫, 于长坤, 许进, 孙成

Effect of Thiourea Imidazoline Quaternary Ammonium Salt Corrosion Inhibitor on Corrosion of X80 Pipeline Steel

BAI Yunlong, SHEN Guoliang, QIN Qingyu, WEI Boxin, YU Changkun, XU Jin, SUN Cheng

表1 不同pH条件下X80管线钢在有无缓蚀剂的模拟油田水溶液中极化曲线参数

Table 1 Polarization parameters of X80 pipeline steel in simulated oil-field water with and without corrosion inhibitor under different pH conditions

Inhibitor T℃ pH EcorrmV IcorrμA·cm-2 βαmV·dec-1 β?mV·dec-1 η% Blank 25 3.5 -701.69 124.63 87.50 455.64 --- 7.2 -708.08 95.50 85.63 350.59 --- 10.5 -715.35 46.77 91.69 433.31 --- 40 3.5 -703.83 129.72 59.69 569.58 --- 7.2 -752.65 96.16 93.41 318.48 --- 10.5 -747.61 48.98 104.83 220.05 --- 60 3.5 -705.60 144.54 98.41 902.75 --- 7.2 -757.23 109.64 40.13 421.17 --- 10.5 -733.61 51.28 52.08 261.80 --- 80 mg/L 25 3.5 -611.42 15.85 47.84 1188.59 87.3 7.2 -671.76 2.33 21.79 182.01 97.6 10.5 -664.51 20.11 66.79 691.29 57.0 40 3.5 -690.83 22.91 67.81 274.64 82.3 7.2 -673.17 2.69 51.25 179.44 97.2 10.5 -685.67 20.89 59.29 252.13 57.3 60 3.5 -732.40 35.48 54.52 224.31 75.5 7.2 -663.61 4.89 42.71 253.72 95.5 10.5 -722.25 22.38 50.15 186.99 56.4