环境因素对硅烷环氧杂化树脂涂层/LY12铝合金间附着力时效性的影响分析

目的研究不同环境因素对硅烷环氧杂化树脂涂层/LY12铝合金间附着力时效性的影响规律。方法制备涂层厚度为30μm的样板,采用拉拔测试仪测试不同环境因素(温度、湿度及酸碱溶液)、不同时间段下涂层/基体间的附着力值,研究环境因素对该涂层/基体间附着力时效性的影响。结果低温或高温环境下,涂层暴露时间越长,其附着力下降程度越大;在湿热环境下,随着试验周期的增加,涂层的附着力明显削弱;酸碱溶液对于涂层体系破坏较为严重。结论环境因素对于硅烷环氧杂化树脂涂层/LY12铝合金间附着力的影响时效性,较为严重的是高低温、酸盐溶液。

Impact of Environmental Factors on the Adhesion Aging of the Silane Epoxy Hybrid Resin Coating /LY12 Aluminum Alloy

Objective To study the influencing law of different environmental factors on the adhesion aging of silane hybrid epoxy resin coating/LY12 aluminum alloy. Methods Coating template with a thickness of 30 m was prepared, and the cohesion between the silane epoxy hybrid resin coating and the substrate under different environmental factors (temperature, humidity and the acid-base solution) and in different time period was tested using the pull tester. Results In low or high-temperature environment, the decrement of adhesion increased with the elongation of exposure time. In hot and humid environment, with the increase of test cycle, the adhesion of coating was significantly weakened. Acid and alkali solutions caused serious damage to the coating system. Conclusion In terms of the effects of environmental factors on the adhesion aging of silane hybrid epoxy resin coating/LY12 aluminum alloy, high and low temperature as well as acid salt solution had serious influences.