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4 0.5 mol/L 碳酸盐缓冲液中的EIS 拟合结果

Table 4 EIS fitting results of the parameters in 0.5 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 3.222 2.339×10-4 0.8779 57790 9.592×10-5 0.9111 3975 2 4.804 2.320×10-4 0.8754 66880 9.332×10-5 0.9016 5297 3 5.499 2.218×10-4 0.8802 72840 9.025×10-5 0.9006 6201 4 3.539 2.133×10-4 0.8883 75630 8.630×10-5 0.9058 6585 5 10.86 8.927×10-5 0.9358 2.946×105 1.225×10-4 0.9140 1.310×104 6 10.53 7.277×10-5 0.9365 4.733×105 1.384×10-4 0.9088 1.257×104 7 10.03 7.713×10-5 0.9354 4.102×105 1.335×10-4 0.9146 1.270×104