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2 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的电化学阻抗谱拟合参数

Table 2 EIS parameters of X80 pipeline steel in simulated oil-field water with and without corrosion inhibitor under different pH conditions

Inhibitor	T ℃	pH	R_s Ω·cm²	CPE_dl, Y_o S·sⁿ·cm^-2	n	R_ct Ω·cm²	η %
Blank	25	3.5	3.73	3.534 $\times$ 10^-4	0.7723	350.1	---
		7.2	6.65	1.506 $\times$ 10^-4	0.8511	412.4	---
		10.5	7.42	5.596 $\times$ 10^-3	0.7686	723.6	---
	40	3.5	3.31	5.878 $\times$ 10^-4	0.6887	134.5	---
		7.2	3.68	5.649 $\times$ 10^-4	0.7662	299.3	---
		10.5	5.32	2.44 $\times$ 10^-3	0.6243	604.6	---
	60	3.5	3.92	4.98 $\times$ 10^-4	0.7303	118.5	---
		7.2	3.64	5.475 $\times$ 10^-4	0.7932	257.0	---
		10.5	5.53	3.738 $\times$ 10^-3	0.5908	372.2	---
80 mg/L	25	3.5	11.78	6.006 $\times$ 10^-4	0.8291	2645	86.8
		7.2	14.00	3.136 $\times$ 10^-4	0.7605	4670	91.2
		10.5	14.04	1.553 $\times$ 10^-3	0.6660	1859	61.1
	40	3.5	13.45	3.83 $\times$ 10^-4	0.7210	1343	90.0
		7.2	17.01	3.141 $\times$ 10^-4	0.7932	4478	93.3
		10.5	7.659	3.979 $\times$ 10^-3	0.6378	1334	54.7
	60	3.5	13.11	8.772 $\times$ 10^-4	0.7998	555.7	78.7
		7.2	12.96	6.584 $\times$ 10^-4	0.8127	2322	88.9
		10.5	9.211	2.97 $\times$ 10^-3	0.6461	729.8	49.0