Nyquist曲线圆弧半径越大证明防腐性能越好。EP涂层在整个浸泡过程曲线半径最小，U-Ti3C2-0.5涂层没有明显提升。当GPS改性Ti3C2含量从0.3wt%增加到0.5wt%和0.7wt%后，涂层阻抗曲线半径先增加后减小，但仍高于U-Ti3C2-0.5涂层。

In Nyquist plots, samples with a larger capacitive arc diameter corresponded to a better anticorrosion property. A significant reduction in capacitive semicircle diameter occurred for all coatings as the soaking time increased. EP had the smallest semicircle diameter in the Nyquist plots duringthe immersion stage, and the worst anticorrosion property. The U-Ti3C2-0.5 coating exhibited only a small improvement in Nyquist plots compared with EP. For the E-Ti3C2 coatings, the semicircle diameter of the Nyquist plots increased when the E-Ti3C2 content increased from 0.3 wt% to 0.5 wt%, and decreased significantly when the E-Ti3C2 content increased to 0.7 wt%. The Nyquist semicircle diameter of E-Ti3C2-0.7 remained larger than that of the EP and U-Ti3C2-0.5.