浸泡腐蚀对HGB/EP复合材料力学性能的影响

在对复合材料的研究中,其吸水性及耐腐蚀性一直是研究的重点之一。本文通过常温和60℃吸水试验以及60℃酸、碱腐蚀试验,研究了空心玻璃微珠填充环氧树脂制成的复合材料(HGB/EP)的吸湿规律、温度对吸湿的影响以及材料在60℃下的腐蚀情况。通过研究不同配比的空心玻璃微珠(HGB)与环氧树脂制成的复合材料吸水量的大小,发现这种材料吸水量大小与微珠的填充率密切相关,不同填充比复合材料其微结构对吸水量影响甚大,且高温能提高吸湿速率和平衡吸湿量。在腐蚀试验中,发现该材料的耐酸性较差,测试后试件表现出软化现象。而酸的浓度越高,腐蚀越严重,经浸泡腐蚀的材料力学性能进一步下降。

Effect of immersion corrosion on mechanical properties of HGB/EP composites

The studies of composites usually emphasize two basic aspects of water absorbing capacity and corrosion resistance.In this paper,the two properties are focused in the composites of epoxy resin and hollow glass beads(HGB/EP) with the water absorbing capacity being tested at room temperature and 60 ℃,and correosion resistance in the acid and alkali conditions at 60 ℃.The studies aim at revealing the moisture absorption characteristics and the influence of temperature on the water uptake and the corrosion behavior of materials at 60 ℃.Water absorption in the composites is found to correlate with beads filling volume ratio and the microstructure of HGB/EP.It is also observed that high temperature can enhance the moisture absorption rate and balance the moisture absorption.The corrosion test shows that the composites have poor acid resistance,and the samples display a softening effect after the tests.The higher acid concentration basically cause more serious corrosion,leading to the reduction of the mechanical properties of the composites.