冷喷涂Zn15Al合金涂层在NaCl溶液中的腐蚀行为和防护机制

徐龙, 李继文, 崔传禹, 卢祺, 杨浩, 赵聪聪

Corrosion Behavior of Cold Sprayed Zn15Al Alloy Coating on Q235 Carbon Steel in NaCl Aqueous Solution

XU Long, LI Jiwen, CUI Chuanyu, LU Qi, YANG Hao, ZHAO Congcong

表4 CS-Zn涂层不同时间点的阻抗谱拟合结果

Table 4 Fitting results of CS-Zn during the immersion

t/ h Rs/ Ω·cm2 CPE1 / S·s n ·cm-2 n1 Rc/ Ω·cm2 CPE2 / S·s n ·cm-2 n2 Rct/ Ω·cm2 CPE3 n3 RFe/ Ω·cm2 ChiSq 1 3.4 1.37 × 10-2 0.42 272.3 8.34 × 10-4 0.69 43.1 - - - 8.16 × 10-4 72 3.5 7.54 × 10-4 0.41 1135 3.38 × 10-4 0.78 27.4 - - - 3.80 × 10-4 144 3.6 6.44 × 10-4 0.61 1469 2.20 × 10-4 0.83 96.3 - - - 3.63 × 10-4 240 3.8 1.13 × 10-3 0.39 2012 2.92 × 10-4 0.76 402.2 - - - 4.17 × 10-4 720 3.5 2.64 × 10-4 0.81 2550 9.46 × 10-4 0.58 1033 - - - 2.55 × 10-4 1440 4.1 1.23 × 10-5 0.62 3303 5.37 × 10-4 0.86 751.5 - - - 5.35 × 10-4 2400 4.8 2.53 × 10-3 0.69 2954 3.68 × 10-3 0.72 291.7 7.68 × 10-6 0.79 9.25 1.09 × 10-4 3648 4.7 2.76 × 10-3 0.71 2198 1.53 × 10-3 0.78 82.3 3.59 × 10-6 0.77 13.93 1.23 × 10-4 4416 4.8 6.10 × 10-3 0.74 1457 6.17 × 10-3 0.57 45.1 2.33 × 10-5 0.59 29.3 5.60 × 10-5