羟基亚乙基二膦酸对20SiMn钢在含Cl-混凝土模拟孔隙液中的缓蚀行为

羟基亚乙基二膦酸对20SiMn钢在含Cl^-混凝土模拟孔隙液中的缓蚀行为

曹凤婷, 魏洁, 董俊华, 柯伟, 王铁钢, 范其香

Corrosion Inhibition Behavior of 1-Hydroxyethylidene-1, 1-Diphosphonic Acid on 20SiMn Steel in Simulated Concrete Pore Solution Containing Cl^-

CAO Fengting, WEI Jie, DONG Junhua, KE Wei, WANG Tiegang, FAN Qixiang

表1 20SiMn钢在1 mol/L NaCl饱和Ca(OH)₂空白及添加1.441×10^-4 mol/L HEDP溶液中EIS的拟合结果

Table 1 Fitting results of EIS of 20SiMn steel at different immersion time in 1 mol/L NaCl saturated Ca(OH)₂ solution without and with 1.441×10^-4 mol/L HEDP

HEDP mol·L^-1	Time h	R_s Ω·cm²	Q_f-Y₀ 10^-4 F·cm^-2	n_f	R_f 10⁴ Ω·cm²	Q_ct-Y₀ 10^-5 F·cm^-2	n_ct	R_ct 10⁵ Ω·cm²	L 10⁵ H·cm²	R_L 10³ Ω·cm²	η %
0	0.5	4.50	1.68	1.00	0.12	4.35	0.91	1.66			-
	3	3.82	1.52	0.98	0.23	4.08	0.92	2.09			-
	6	3.83	1.56	0.97	0.26	3.89	0.93	1.83			-
	9	3.84	1.24	1.00	0.10	4.28	0.92	0.09			-
	24	2.99	0.46	0.92	0.07	14.78	0.57	0.05	1.54	9.62	-
1.441×10^-4	0.5	4.26	1.10	0.87	0.81	4.73	0.94	3.10			46.45
	3	2.91	0.91	0.87	1.59	4.45	0.94	3.97			47.36
	6	3.82	0.76	0.86	2.54	4.47	0.96	4.55			59.78
	9	3.77	0.75	0.86	3.33	4.00	0.96	7.12			98.74
	24	3.95	0.44	0.85	0.39	1.87	0.66	0.76			93.42