2Cr-1Ni-1.2Mo-0.2V钢在NH4H2PO4溶液中的电化学腐蚀行为研究

2Cr-1Ni-1.2Mo-0.2V钢在NH₄H₂PO₄溶液中的电化学腐蚀行为研究

王通, 孟惠民, 葛鹏飞, 李全德, 巩秀芳, 倪荣, 姜英, 龚显龙, 戴君, 隆彬

Electrochemical Corrosion Behavior of 2Cr-1Ni-1.2Mo-0.2V Steel in NH₄H₂PO₄ Solution

WANG Tong, MENG Huimin, GE Pengfei, LI Quande, GONG Xiufang, NI Rong, JIANG Ying, GONG Xianlong, DAI Jun, LONG Bin

表5 1R钢在不同浓度NH₄H₂PO₄溶液中的电化学阻抗谱参数

Table 5 Electrochemical impedance spectroscopy parameters of 1R steel immersed in NH₄H₂PO₄ solution at different concentrations for 20 h

Solution	R_s / Ω·cm²	Q_f		R_f / Ω·cm²	R_L / Ω·cm²	L / H	Q_dl		R_ct / Ω·cm²
Solution	R_s / Ω·cm²	Y₀ / Ω^-1·cm^-2·S ⁿ	$n$	R_f / Ω·cm²	R_L / Ω·cm²	L / H	Y₀ / Ω^-1·cm^-2·S ⁿ	$n$	R_ct / Ω·cm²
0 mmol/L	7.58 $\times$ 10⁴	---	---	---	---	---	6.76 $\times$ 10^-5	0.81	6.33 $\times$ 10⁴
1 mmol/L	5816	---	---	---	---	---	2.16 $\times$ 10^-4	0.62	9977
30 mmol/L	297.6	1.95 $\times$ 10^-3	0.97	203	255.9	2647	5.87 $\times$ 10^-4	0.77	480.4
60 mmol/L	143	3.03 $\times$ 10^-3	0.97	114.3	42.3	751.4	9.64 $\times$ 10^-4	0.76	331.8
90 mmol/L	103	3.09 $\times$ 10^-3	0.95	77.54	0.03	257.7	1.02 $\times$ 10^-3	0.76	266.9
120 mmol/L	80.76	3.37 $\times$ 10^-3	0.97	57.47	0.01	180.4	1.09 $\times$ 10^-3	0.76	243.4