为对深水用涂层系统的评价和选用提供参考，以 4种双层环氧涂层系统为研究对象，采用深海环境模拟实验（ 64 ℃，15 MPa）研究了环氧类涂层系统在深海环境下的性能变化。对初始及经过深海环境模拟实验后的涂层进行拉开法附着力和耐阴极剥离性能测试，分析深水环境对涂层基本性能的影响。此外，研究了涂层在常压水浸泡和深海环境模拟实验中不同时间段的吸水率、电化学阻抗谱以及涂层表面形貌的变化，探讨深水压作用下海水对涂层的渗透性以及对涂层阻抗和防腐性能的影响。结果表明：经过深水压实验后，涂层依然能有效附着于钢材表面，但其阻抗和防腐性能明显下降。最后，结合深水环境下的防腐系统应用实际，指出了常用阴极保护设计规范并不适用于深水环境，建议深水阴极保护设计应考虑钢结构所用涂层的实际绝缘电阻。

In order to provide references for the evaluation and selection of deep-sea coating，a study was conducted on four dual-layer epoxy coating systems by using deep-seaenvironment simulation experiments（64 ℃，15 MPa）to investigate the performance variations of epoxy coatings under deep-sea conditions. Pull-off adhesion tests and cathodic disbondment tests were carried out on both the initial coatings and those subjected to the deep-sea simulation experiment to analyze the effects of the deep-sea environment on the basicproperties of the coating. Additionally，the water absorption，electrochemical impedance spectroscopy（EIS）， and surface morphology of the coating were examined after variousdurations of immersion in normal-pressure water and the deep-sea simulation experiment. Theresults showed that，after deep-sea pressure tests，the coating could still effectively adhere to the steel surface，but their impedance and corrosion resistance significantly decreased. Finally， considering the practical application of anti-corrosion systems in deep-sea environments，this article highlighted the inadequacy of conventional cathodic protection design standards fordeep-sea conditions and suggested that deep-sea cathodic protection should take into accountthe actual resistance of the coatings used on steel structures.