环氧基热防护涂层的耐湿热性能研究  

Damp heat resistance of epoxy-based thermal protective coatings

作　　者：李晓升[1] 党文伟 杨振兴 LI Xiaosheng;DANG Wenwei;YANG Zhenxing(China Airborne Missile Academy,Luoyang 471009,China)

机构地区：[1]中国空空导弹研究院,河南洛阳471009

出　　处：《电镀与涂饰》2025年第3期145-149,共5页Electroplating & Finishing

摘　　要：[目的]研究湿热环境对热防护涂层性能的影响。[方法]采用环氧树脂作为基体树脂复配不同功能填料,制备了5种热防护涂层,根据湿热试验前后涂层的吸水率、剪切强度、附着力及外观,分析了涂层发生起泡故障的机理。[结果]热防护涂层中含有可溶性盐类填料在湿热环境下吸水,令涂层内部与表面形成渗透压,为环境中的水分子持续进入涂层内部提供了动力。涂层中可溶性盐类填料含量越高,湿热环境下吸水起泡故障越明显。[结论]采用改性环氧树脂作为基体树脂,并降低可溶性盐类填料的含量,可有效提高涂层的耐湿热能力。[Objective]The effect of damp heat environment on the performance of thermal protective coatings was studied.[Method]Five types of thermal protective coatings were prepared from epoxy resin with different functional fillers.The mechanism of blistering failure of the coatings was analyzed based on their water absorption rate,shear strength,adhesion strength,and surface appearance before and after damp heat testing.[Result]Soluble salt-based fillers within the coatings absorbed moisture during damp heat testing,creating an osmotic pressure gradient within the coatings.This gradient provided a driving force for the continuous ingress of water molecules into the coatings.Higher content of soluble salt-based fillers led to more severe blistering failure in damp heat environment.[Conclusion]Using modified epoxy resin as the binder and reducing the content of soluble salt-based fillers effectively improve the resistance of the coatings to damp heat environment.

关 键 词：环氧基涂层 热防护 可溶性盐 耐湿热性能 起泡 故障分析 

分 类 号：TB35[一般工业技术—材料科学与工程] TG174.461[金属学及工艺—金属表面处理]