This study reported a novel bio-based waterborne epoxy (WE) coating with superior water-repellency and anti-corrosion performance by embedding polydimethylsiloxane functionalized by benzotriazole (PDMS-BTA). Based on electrochemical measurement and salt immersion test, the WE coating containing 5 wt% PDMS-BTA exhibited optimum anticorrosive performance, whose impedance modulus at 0.01 Hz was 120 times higher than that of the plain WE coating after immersion in electrolytes for 45 days, and corrosion rate was as low as 3.76 × 10⁻⁴ mpy. The superior anticorrosion property was attributed to the water-repellent property of surface-enriched PDMS and the passivation protection of BTA.

本研究报告了一种新型生物基水性环氧树脂 (WE) 涂料，它通过嵌入苯并三唑 (PDMS-BTA) 官能化的聚二甲基硅氧烷，具有优异的防水和防腐性能。基于电化学测量和盐浸试验，含 5 wt% PDMS-BTA 的 WE 涂层表现出最佳的防腐性能，在电解液中浸泡 45 天后，其在 0.01 Hz 的阻抗模量是普通 WE 涂层的 120 倍，并且腐蚀速率低至 3.76 × 10 ^-4 mpy。优异的防腐性能归因于表面富集的 PDMS 的防水性能和 BTA 的钝化保护。