20SiMn钢在恒定pH值的碳酸盐溶液中的腐蚀行为*

曹凤婷, 魏洁, 董俊华, 柯伟

CORROSION BEHAVIOR OF 20SiMn STEEL REBAR IN CARBONATE/BICARBONATE SOLUTIONS WITH THE SAME pH VALUE

CAO Fengting, WEI Jie, DONG Junhua, KE Wei

表1 0.437×10-3 mol/L NaOH溶液中的EIS拟合结果

Table 1 EIS fitting results of the parameters in 0.437×10-3 mol/L NaOH solution

Immerse time d Rs Ω·cm2 Q1 Ω-1·cm-2·sn n1 R1 Ω·cm2 Qdl Ω-1·cm-2·sn nct Rct Ω·cm2 1 33.19 0.00103 0.8726 52.35 7.025×10-4 0.8473 1103 2 42.55 0.00175 0.9408 36.88 7.125×10-4 0.8522 1454 3 78.33 0.09831 1 263.3 7.515×10-4 0.827 1207 4 90.28 0.00237 0.5975 1620 0.00415 1 312 5 67.82 0.00187 0.6404 1057 0.0057 1 161 6 70.91 0.00124 1 8.396 0.00154 0.7005 1186 7 34.11 1.937×10-8 0.8873 106.2 0.00175 0.6847 1095