APTES改性蒙脱土对镁合金表面杂化溶胶-凝胶涂层防护性能的影响

刘煊煊, 于金山, 高燕, 赵鹏, 王启伟, 杜卓玲, 张俊喜

Effect of APTES Modified Montmorillonite on Protective Property of Hybrid Sol-gel Coating on Mg-alloy

LIU Xuanxuan, YU Jinshan, GAO Yan, ZHAO Peng, WANG Qiwei, DU Zhuoling, ZHANG Junxi

表2 不同涂层样品电化学阻抗谱拟合参数

Table 2 Equivalent fitting parameters from Bode plots

Sample Time Q RΩ·cm2 Q RΩ·cm2 Q RΩ·cm2 χ2 Y / Ω-1·cm-2·μSn n Y / Ω-1·cm-2·μSn n Y / Ω-1·cm-2·μSn n Bare 15.01 0.9062 3878 --- --- --- 1503 1.0 1313 8.798×10-4 PSG 1 h 4.425×10-4 0.914 3.688×105 --- --- --- 3.129 0.7977 2.966×105 2.43×10-3 7 d 1.841×10-3 0.8589 5200 2.587 0.5733 3.901×104 4.984 0.7035 5.952×105 8.07×10-5 15 d 2.921 0.3587 1918 0.2142 0.9295 1236 6.248 0.6351 3.899×105 2.2×10-4 APSG 1 h 3.482×10-4 0.9239 1.096×106 --- --- --- 2.333 0.8334 1.022×106 1.688×10-3 7 d 4.662×10-4 0.9211 6.640×104 --- --- --- 4.119 0.5981 6.934×105 7.479×10-4 15 d 5.484×10-4 0.9172 3.313×104 --- --- --- 5.923 0.5858 4.437×105 7.72×10-4