304不锈钢在模拟混凝土孔隙液中的点蚀行为研究

盖喜鹏, 雷黎, 崔中雨

Pitting Corrosion Behavior of 304 Stainless Steel in Simulated Concrete Pore Solutions

GAI Xipeng, LEI Li, CUI Zhongyu

表1 304 不锈钢在不同模拟混凝土孔隙液中的EIS拟合参数

Table 1 Fitting parameters of EIS results of 304 stainless steel at different potentials in different simulated concrete pore solutions

Solution	Cl^-mol·L^-1	R_passkΩ·cm²	R_pit Ω·cm²	R_i Ω·cm²	n	CPE_pass 10^-3 Ω^-1·cm^-2·sⁿ	n	CPE_pit 10^-3 Ω^-1·cm^-2·sⁿ
HCO₃^- CO₃^2- alkaline solution	0	703.8	---	---	0.92	11.00	---	---
	0.05	678.8	---	---	0.92	10.76	---	---
	0.12	768.5	308	16	0.75	7.94	0.82	3.31
Saturated Ca(OH)₂	0	661.3	---	---	0.90	11.84	---	---
	0.05	692	---	---	0.90	12.10	---	---
	0.1	717.1	---	---	0.91	12.87	---	---
	0.2	392.7	7588	26	0.92	12.92	0.58	16.75