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通过失重及表面腐蚀层厚度的测定以及红外吸收光谱（ＦＴ－ＩＲ）、扫描电镜（ＳＥＭ）等分析手段研究了二甲苯不饱和聚酯树脂（ＸＵＰＲ）在３０％硝酸溶液中的腐蚀行为，提出了材料耐该介质腐蚀的机理．结果表明，失重和表面腐蚀层厚度经一定时间浸泡后趋于稳定，不同温度下达到的稳定失重和腐蚀层厚度值不同．腐蚀机理为：浸泡过程中试样表面发生了物理吸附及化学反应，形成了一层淡黄色的物质，其厚度与温度有关．该层物质阻止了硝酸分子向试样内部的扩散．
The corrosion behavior of xylene unsaturated polyester resin (XUPR) in 30% nitric acid solution was studied by measurement of weight loss and thickness of surface corrosion layer, FT-IR and SEM. The material is resistant to the mechanism of corrosion of the medium. The results show that the weight loss and the thickness of the surface corrosion layer tend to be stable after soaking for a certain period of time, and the values of the stable weight loss and the erosion layer thickness at different temperatures are different. The mechanism of corrosion is as follows: physical adsorption and chemical reaction occur on the sample surface during immersion, forming a layer of pale yellow material, the thickness of which is related to temperature. This layer of material prevents the nitric acid molecules from diffusing inside the sample.