采用重量法和电化学阻抗谱法考察了两种环氧涂层的吸水性 和防腐蚀作用.结果表明水在涂层中的扩散可以分为两个过程，分别作用于提高涂层的离子 导电性和降低涂层在金属表面粘结性.涂层的吸水性对金属/涂层界面行为有重要的影响， 从而影响涂层的防腐蚀性能.以吗啉Mannich碱固化的环氧涂层在涂层/金属界面的憎水性有 所提高，具有较好的防腐蚀能力.
The water uptake of two kinds of epoxy films and co atings was investigated using gravimetric method and electrochemical impedance s pectroscopy.The water barrier properties and their effect on the degradation of the interface have been studied.The results show that the water uptake of coatin g can be divided into two processes.One is the permeation of water in coating it self.The other is dispersing of water on metal surface.The bond of metal/coating interface has important influence on corrosion protection of epoxy coating.The epoxy resin,which had been blended with Morpholium Mannich base,had better corro sion resistance.
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