含多巴胺改性MXene粒子的水性环氧涂层EIS防腐性能数据表格。

Nyquist曲线中更大的圆弧半径代表了更好的防腐性能。EP涂层在整个浸泡过程中曲线半径一最小，加入Ti3C2后曲线半径增加较小。D-Ti3C2涂层圆弧半径进一步增加，代表了与EP和Ti3C2涂层相比更好的性能。Bode曲线中，低频下对应的阻抗值（|Z|0.01Hz）越高代表了涂层更好的防腐性能。浸泡初期，EP涂层阻抗模量为7.94×10⁵ Ω· cm²。M3和M5涂层与EP相比提升了一个数量级。当Ti3C2含量从0.7增加到0.9 wt%后，M7和M9涂层阻抗与EP相比有超过两个数量级的提升。在浸泡后期， EP, M3 和 M5涂层阻抗值减小到了 5.89×10⁴ Ω· cm², 2.75×10⁵ Ω· cm² 和1.74×10⁶ Ω· cm²，M7和M9涂层阻抗模量未保持较高值。值得一提的是，D-Ti3C2涂层与EP和Ti3C2涂层相比有更显著的防腐性能。DM3, DM5 和DM7涂层浸泡后阻抗值下降较少，但DM9涂层由于D-Ti3C2的团聚造成了性能的下降，阻抗值减小较多。

EIS corrosion resistance data sheet of waterborne epoxy coating containing dopamine-modified MXene particles.

In Nyquist plots, a larger capacitive arc diameter meant better anticorrosion performance of the coating. EP exhibited the worst performance during the whole immersion time due to the smallest arc curve. With the addition of Ti3C2, the diameter of the curves increased to a lesser extent. For D-Ti3C2 coatings, the arc size further enlarged, indicating excellent performance compared to EP and Ti3C2 coatings. In Bode plots, the impedance modulus at a lower frequency of 0.01 Hz (|Z|0.01Hz) was chosen. A higher |Z|0.01Hz represented a better anticorrosion property. At the initial soaking time, the impedance modulus of EP was 7.94×105 Ω· cm2. The impedance moduli of M3 and M5 were one order of magnitude enhancement compared to EP. As Ti3C2 content further increased to 0.7 and 0.9 wt%, the impedance value of M7 and M9 were over two orders of magnitude improvement. At the post-corrosion stage, the impedance modulus of EP, M3 and M5 decreased to 5.89×104 Ω· cm2, 2.75×105 Ω· cm2 and 1.74×106 Ω· cm2. High resistance value of M7 and M9 did not maintain. It was noteworthy that D-Ti3C2 coatings possessed outstanding anticorrosion properties according to the greater impedance value compared to EP and Ti3C2 coatings throughout the soaking tests. |Z|0.01Hz of DM3, DM5 and DM7 showed little reduction after immersion. However, DM9 displayed a larger reduction in the impedance value, presumably because of the agglomeration of D-Ti3C2 nanosheets.