采用失重法,并对腐蚀产物的物质组成和显微结构进行X射线衍射和扫描电镜分析,对十水硫酸钠基复合相变储能材料相变循环对不锈钢、铝合金、纯铜和黄铜等金属封装材料的腐蚀动力学特性进行了研究.结果表明:金属封装材料的耐腐蚀性为不锈钢最佳,紫铜的耐腐蚀性最差,其顺序为:不锈钢304＞不锈钢201＞铝合金1060＞铝合金5052＞铝合金6061＞铝合金7075＞黄铜＞紫铜,纯铜的腐蚀主要以点蚀形式存在,蚀孔表面有Cu2O膜的存在,Cl-的存在与氧竞争吸附,加速腐蚀;黄铜也存在点蚀,同时黄铜与相变材料反应,生成物质粘附在黄铜表面.铝合金腐蚀以点蚀形式存在,腐蚀产物呈开裂状附着于基体表面.铜及合金和铝合金不适合做芒硝基复合相变储能材料的封装材料,不锈钢201和304呈现良好的耐腐蚀状态,适宜作为芒硝基复合相变储能材料的金属封装材料.
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