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5 CS-Zn15Al涂层不同时间点阻抗谱的拟合数据

Table 5 Fitting results of CS-Zn15Al 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 W CPE3 / S·s n ·cm-2 n3 RFe/ Ω·cm2 ChiSq 1 3.4 2.12 × 10-4 0.68 1407 9.55 × 10-4 0.65 6552 - - - - 9.32 × 10-4 72 4.6 1.97 × 10-4 0.77 321.5 1.48 × 10-3 0.62 3405 - - - - 3.95 × 10-4 144 3.3 2.73 × 10-4 0.75 452.6 1.49 × 10-3 0.71 2614 - - - - 5.63 × 10-4 240 3.7 2.52 × 10-4 0.75 439.6 2.54 × 10-3 0.65 1547 2.5 × 10-3 - - - 5.08 × 10-4 720 3.9 2.86 × 10-4 0.69 2170 2.09 × 10-3 0.69 1030 1.7 × 10-3 - - - 6.81 × 10-4 1440 4.1 1.32 × 10-4 0.58 1420 1.76 × 10-4 0.75 3357 1.5 × 10-3 - - - 8.70 × 10-5 2400 4.1 2.07 × 10-4 0.42 361.5 2.91 × 10-4 0.66 6165 - - - - 5.19 × 10-4 3648 4.7 5.40 × 10-4 0.56 680.3 1.37 × 10-4 0.91 5290 - - - - 5.19 × 10-4 4416 3.9 4.98 × 10-4 0.59 389.2 3.11 × 10-4 0.82 4511 - 1.90 × 10-4 0.41 43.8 2.28 × 10-4