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用质量变化曲线拟合求导的方法研究不同温度下玻璃纤维增强乙烯基酯树脂(GF/VE)复合材料在40wt%硫酸介质中的腐蚀速率,探讨了介质温度及浸泡时间对腐蚀速率的影响,并对比75℃下乙烯基酯树脂浇注体及玻璃纤雏的腐蚀速率,分析了GF/VE复合材料在硫酸中的腐蚀机理。结果表明,乙烯基酯树脂浇注体在硫酸中的腐蚀速率随腐蚀时间的延长逐渐降低,最后基本趋于平衡,玻璃纤维在硫酸中的腐蚀速率随腐蚀时间逐渐增加,但数值很小,而GF/VE复合材料的腐蚀速率随腐蚀时间的延长不断增加,且随温度升高,腐蚀速率增大。结合SEM照片观察得出,GF/VE复合材料在硫酸介质浸泡初始主要是树脂发生腐蚀,后期主要是界面腐蚀起主导作用。
The corrosion rate of glass fiber reinforced vinyl ester resin (GF / VE) composites in 40wt% sulfuric acid medium at different temperatures was studied by the method of fitting and derivation of the curve of the quality variation. The effects of the medium temperature and the immersion time on the corrosion rate The corrosion rate of GF / VE composites in sulfuric acid was analyzed by comparing the corrosion rate of vinyl ester resin and glass fiber at 75 ℃. The results showed that the corrosion rate of vinyl ester resin in sulfuric acid decreased gradually with the increase of etching time and finally tended to balance. The corrosion rate of glass fiber in sulfuric acid gradually increased with the increase of etching time, but the value of GF / VE composite corrosion rate increases with the extension of the corrosion time, and with increasing temperature, the corrosion rate increases. According to SEM photographs, it is found that the initial corrosion of GF / VE composites in the initial immersion in sulfuric acid medium is mainly caused by the resin, and the later is mainly the interfacial corrosion.