严酷海洋大气环境下玻璃纤维复合材料腐蚀老化规律研究

目的 研究严酷海洋大气环境下,玻璃纤维增强树脂基复合材料的腐蚀老化规律.方法 通过实海大气环境试验,分析了南海岛礁大气环境下,复合材料暴露不同周期后的腐蚀形貌特征以及力学性能变化规律,建立了腐蚀老化性能预测灰色模型GM(1,1),并与青岛、厦门和三亚等典型海洋大气环境进行对比研究.结果 随暴露时间的增长,南海岛礁大气环境下的复合材料发生严重的纤维裸露,其弯曲强度呈下降趋势,基于弯曲强度建立的灰色模型GM(1,1)精度达到1级;与其他典型海洋大气环境相比,随着纬度的降低,复合材料的弯曲强度呈下降趋势.结论 灰色模型GM(1,1)对复合材料在岛礁等严酷海洋大气环境下的腐蚀老化性能预测精度较高.影响复合材料性能的最主要环境因素为辐照,其次为相对湿度和温度.

Study on Corrosion Aging Behavior of Glass Fiber Reinforced Composites in Severe Marine Atmospheric Environment

The objective of this work is to investigate the corrosion aging behavior of glass fiber reinforced resin matrix composites in the severe marine atmospheric environment. Field exposure test on composite materials in the atmospheric environment of South China Sea reef was carried out for different periods. The corrosion aging morphology characteristics and mechanical properties evolution rules were analyzed. Based on the accumulated data, the grey prediction model GM (1,1) was established. Furthermore, the results were compared with that in other typical marine atmospheric environments of Qingdao, Xiamen and Sanya. With the extension of the exposure time, the fibers of the composites were exposed seriously in the atmospheric environment of the South China Sea reef, and the flexural strength of the composites decreased. The accuracy of the grey model GM (1,1) established based on the flexural strength data reached grade 1. Compared with other typical marine atmospheric environments, the flexural strength of the composites showed a downward trend with the decrease of latitude. Using the grey model GM (1,1) to predict the aging behavior of the composites in the severe marine atmospheric environment can achieve high prediction accuracy. The main environmental factors affecting the mechanical properties of the composites are irradiation, followed by relative humidity and temperature.