为了进一步探讨酚醛环氧/环氧树脂复合涂层的抗老化性能,采用浸渍-提拉法在Q235碳钢表面制备其涂层,并用紫外线老化箱进行加速老化.采用电化学测试技术分析了复合涂层不同辐照阶段的阻水性能,以红外光谱和慢正电子束分析技术对UV-B紫外辐照下复合涂层的化学结构变化进行了推测.结果表明:复合涂层的阻水性能优异,辐照前、中期(＜528 h)时的化学结构相对稳定;含紫外线吸收剂(UV-531)的复合涂层抗老化性能大幅提高,在辐照后期(864h),当UV-531含量为1.5％时,阻水性能最佳,浸泡20d后低频阻抗依然保持在109 Ω·cm2.
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