铜封端负载8-HQ埃洛石纳米管镁合金微弧氧化自修复涂层的制备及耐蚀性能

施艳, 饶智航, 缪程平, 张洋, 陈赵扬, 屠晓华, 李加友, 褚有群

Preparation and Corrosion Resistance of a Copper-capped 8-HQ-loaded Halloysite Nanotube-based Self-healing Coating on Mg-alloy via Micro-arc Oxidation

SHI Yan, RAO Zhihang, MIAO Chengping, ZHANG Yang, CHEN Zhaoyang, TU Xiaohua, LI Jiayou, CHU Youqun

表2 4种MAO涂层EIS数据的拟合结果

Table 2 Fitting results of EIS data of the four MAO coatings

Coatings Time/ h Rs/ Ω·cm2 CPE1-T/ F·cm-2 s n-1 CPE1-P Rcoat/ kΩ·cm2 CPE2-T/ F·cm-2 s n-1 CPE2-P Roxide/ kΩ·cm2 Rp/ kΩ·cm2 MAO 1 11.45 7.23 × 10-7 0.73 101.50 9.17 × 10-5 0.60 62.36 163.86 3 9.86 1.03 × 10-6 0.77 39.79 6.03 × 10-5 0.67 9.30 49.09 5 11.25 1.11 × 10-6 0.80 11.18 7.70 × 10-4 0.63 4.41 15.59 7 13.81 9.07 × 10-7 0.91 8.04 4.34 × 10-5 0.47 3.99 12.03 8 13.25 1.24 × 10-6 0.92 5.39 2.09 × 10-4 0.52 0.82 6.21 9 8.53 1.21 × 10-6 0.82 5.74 2.54 × 10-4 0.78 1.18 6.92 24 13.36 1.37 × 10-6 0.93 4.50 1.17 × 10-3 0.74 0.64 5.14 168 13.43 1.869 × 10-6 0.92 3.27 7.74 × 104 0.73 0.29 3.56 HNTs-MAO 1 11.45 7.23 × 10-7 0.73 101.50 9.17 × 10-5 0.60 62.36 163.86 3 10.36 6.98 × 10-7 0.84 24.64 1.13 × 10-4 0.52 17.08 41.72 5 9.52 9.42 × 10-7 0.85 14.31 5.43 × 10-5 0.81 2.24 16.55 7 10.08 1.23 × 10-6 0.92 8.65 1.95 × 10-4 0.62 1.65 10.30 8 11.33 1.22 × 10-6 0.80 7.21 1.71 × 10-4 0.80 1.22 8.43 9 11.07 1.68 × 10-6 0.80 5.50 2.41 × 10-5 0.80 0.99 6.49 24 14.31 1.87 × 10-6 0.90 4.56 6.02 × 10-4 1.00 0.49 5.05 168 11.759 1.22 × 10-7 0.80 1.95 2.09 × 10-5 0.90 0.97 2.92 8-HQ-HNTs-MAO 1 10.11 3.33 × 10-7 0.82 46.88 2.22 × 10-6 0.50 344.80 391.68 3 8.06 7.73 × 10-7 0.83 20.44 1.79 × 10-4 0.58 20.66 41.10 5 13.84 1.27 × 10-6 0.89 2.50 2.62 × 10-7 0.99 4.03 6.53 7 10.37 9.31 × 10-7 0.86 10.26 1.88 × 10-5 0.82 1.39 11.65 8 10.81 1.04 × 10-6 0.89 9.73 2.21 × 10-4 0.83 0.98 10.71 9 10.54 2.70 × 10-7 0.90 2.06 1.12 × 10-6 0.81 6.45 8.51 24 10.28 5.02 × 10-7 0.96 1.81 1.08 × 10-6 0.91 3.91 5.72 168 11.76 2.08 × 10-6 0.91 3.94 1.98 × 10-5 0.81 0.76 4.70 Cu-8-HQ-HNTs-MAO 1 10.25 4.51 × 10-7 0.78 35.05 7.25 × 10-7 0.62 385.90 420.95 3 10.75 8.52 × 10-7 0.80 30.06 2.71 × 10-9 0.81 19.88 49.94 5 10.21 7.94 × 10-7 0.85 15.68 4.49 × 10-5 0.39 4.47 20.15 7 10.58 1.46 × 10-7 1.00 1.10 1.10 × 10-6 0.75 7.50 8.60 8 10.25 1.18 × 10-6 0.92 7.02 2.44 × 10-5 0.54 1.34 8.36 9 10.29 5.66 × 10-7 0.80 8.27 7.29 × 10-7 0.76 13.94 22.21 24 10.19 1.62 × 10-6 0.77 11.60 7.46 × 10-8 0.80 3.76 15.36 168 11.24 1.37 × 10-6 0.88 3.57 3.81 × 10-5 0.96 2.14 5.71