在Bode曲线中，低频下对应涂层的阻抗值常被选为评价涂层防腐性能的重要参数。EP涂层浸泡30天后，阻抗值从2.46 × 103 Ω⋅cm2下降到了 1.19 × 103 Ω⋅cm2， U-Ti3C2-0.5涂层从3.57 × 104 Ω⋅cm2 下降到了 6.36 × 103 Ω⋅cm2，提升了两个数量级。E-Ti3C2-0.3, E-Ti3C2-0.5和E-Ti3C2-0.7涂层在30天后阻抗值别分可达2.51 × 105 Ω⋅cm2, 1.53 × 105 Ω⋅cm2和1.58 × 104 Ω⋅cm2，有明显的的提升。电化学阻抗谱测试印证了GPS改性Ti3C2对环氧树脂防腐涂层性能的改善作用。

For Bode plots, the impedance modulus at a lower frequency of 0.01 Hz (|Z|0.01Hz) was selected as a reference indicator to assess the anticorrosion performance of all coatings. A higher |Z|0.01Hz represented a better anticorrosion property. EP had an initial |Z|0.01Hz of 2.46 × 103 Ω⋅cm2 at 3 days of soaking and showed a decreased |Z|0.01Hz of 1.19 × 103 Ω⋅cm2 after 30 days of soaking. U-Ti3C2-0.5 had a |Z|0.01Hz of 3.57 × 104 Ω⋅cm2 and 6.36 × 103 Ω⋅cm2 at 3 and 30 days of soaking, respectively. These two values were slightly higher than the corresponding EP values. The |Z|0.01Hz of E-Ti3C2-0.3 and E-Ti3C2-0.7 was 3.76 × 105 Ω⋅cm2 and 1.58 × 105 Ω⋅cm2 at 3 day, respectively, i.e., two orders of magnitude higher than that for the EP, whereas the |Z|0.01Hz of E-Ti3C2-0.5 was 2.06 × 106 Ω⋅cm2 at 3 days, which is nearly three orders of magnitude higher than that for the EP. After immersion for 30 days, the |Z|0.01Hz of E-Ti3C2-0.3, E-Ti3C2-0.5 and E-Ti3C2-0.7 was 2.51 × 105 Ω⋅cm2, 1.53 × 105 Ω⋅cm2 and 1.58 × 104 Ω⋅cm2, respectively, which remained much higher than that for EP.