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3 0.05 mol/L 碳酸盐缓冲液中的EIS 拟合结果

Table 3 EIS fitting results of the parameters in 0.05 mol/L carbonate buffer solution

Immerse time d Rs Ω·cm2 Q1 Ω-1·cm-2·sn n1 R1 Ω·cm2 Qct Ω-1·cm-2·sn nct Rct Ω·cm2 1 29.71 4.796×10-5 0.9682 1.004×106 1.034×10-4 0.8553 24940 2 35.20 4.731×10-5 0.9819 1.145×106 8.242×10-5 0.8585 36300 3 30.27 4.414×10-5 0.9718 1.256×106 8.412×10-5 0.8653 36490 4 27.96 4.642×10-5 0.9641 1.078×106 8.349×10-5 0.8648 34270 5 26.59 4.457×10-5 0.9794 1.196×106 7.351×10-5 0.8660 44470 6 33.17 4.354×10-5 0.9792 1.236×106 7.237×10-5 0.8653 46890 7 24.01 4.182×10-5 0.9758 1.254×106 7.383×10-5 0.8678 45270