Durability of basalt fibers and composites in corrosive environments
Durability of basalt fibers and composites in corrosive environments
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玄武岩纤维和复合材料在腐蚀环境中的耐久性
DOI：
10.1177/0021998314526628
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发表时间：
2015-03-01
影响因子：
2.9
通讯作者：
Zhang, Guangchao
中科院分区：
文献类型：
--
作者：
Wu, Gang;Wang, Xin;Zhang, Guangchao
本文通过实验研究了玄武岩纤维和环氧基复合材料在碱性、酸性、盐类和水溶液等腐蚀性环境中的拉伸性能退化，并阐明了相应的退化机理。采用碳纤维和玻璃纤维及其复合材料作为参照物。在25℃和55℃的温度下进行了加速实验，并通过拉伸测试、质量损失称重、扫描电子显微镜成像和能谱分析等手段研究了拉伸性能的变化。实验结果表明，玄武岩纤维具有较强的抗水、盐腐蚀能力，中等的耐酸腐蚀能力，在碱性溶液中有较强的降解能力。玄武岩FRP复合材料的拉伸性能远好于玄武岩纤维。玄武岩纤维的降解机理包括在盐、水和碱性溶液中的腐蚀损伤以及在酸性溶液中化学成分的变化。玄武岩玻璃钢复合材料的断裂性能是由纤维和树脂之间腐蚀界面的破坏控制的，这使得界面成为关键因素，而不是纤维本身。
This study describes an experimental investigation of the degradation of the tensile properties of basalt fibers and epoxy-based composites in various corrosive environments, including alkaline, acid, salt and water solutions, and clarifies the corresponding degradation mechanisms. Carbon and glass fibers and their composites are adopted as references. Accelerated experiments were conducted at temperatures of 25℃ and 55℃ and the variation in tensile properties was studied by means of tension testing, mass loss weighing, scanning electron microscope imaging and energy spectrum analysis. The experimental results show that basalt fibers posses relatively strong resistance to water and salt corrosion, moderate resistance to acid corrosion and severe degradation in an alkaline solution. The tensile properties of basalt FRP composites are much better than those of basalt fibers. The degradation mechanism of basalt fibers involves damage by etching in salt, water and alkaline solutions and by change in the chemical composites in an acid solution. The fracture properties of basalt FRP composites are controlled by the failure of corroded interfaces between the fibers and the resin, making the interface the critical factor, rather than the fiber itself.