连续玄武岩纤维及其复合材料耐腐蚀特性

通过考察玄武岩纤维在蒸馏水、氢氧化钠溶液及盐酸中煮沸3h后的强度与质量变化,及其复合材料在8种化学介质中分别浸泡15d、30d和90d后的力学性能与表面形态变化,对一种国产连续玄武岩纤维及其复合材料的耐化学介质腐蚀性能进行了实验研究.结果表明,该玄武岩纤维及其复合材料都有很好的耐水及耐碱性能,且纤维的耐碱性能优于其耐酸性能.由于玄武岩纤维的耐酸碱性能差异,使复合材料具有如下腐蚀特性:酸性介质中,复合材料弯曲强度和弯曲模量同步降低;碱性介质中,复合材料弯曲强度降低,而弯曲模量几乎保持不变.

Corrosion resistance characteristic of continuous basalt fiber and its reinforcing composites

To explore the corrosion property of a new kind basalt fiber and its reinforcing composites,the basalt fiber was boiled 3 h in water,sodium hydroxide and hydrochloric acid.The residual tensile strength and mass loss of basalt fiber after boiled were investigated.It was showed that the alkali resistance of the basalt fiber is better than acid resistance.To investigate the chemical durability of basalt composite in different mediums,samples were immersed in eight kinds of chemical mediums for 15,30 and 90 days.After each period of immersion,the bending properties were tested and surface morphologies were observed.Study results reveal that the corrosion behavior of composite is very different in acid and alkaline due to the basalt fiber resistance difference.In acid mediums,the bending strength and bending module change in the same way.In alkaline mediums,bending module is very blunt compared with bending strength,bending module keeps close to the originality while bending strength declines gradually.