摘要
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Cu_2O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。
Corrosion product,the corrosion kinetics of metal packaging materials,including stainless steel,aluminium alloy,red copper and brass,by sodium sulfate decahydrate based composite phase change material were investigated by weight-loss method and X-ray diffraction analysis（ XRD） and scanning electron microscopy（ SEM） analysis. The results show that the corrosion resistance of stainless steel is best,and the pure copper is worst. Order of corrosion resistance is： stainless steel 304 〉stainless steel 201 〉1060 aluminum aluminum alloy 5052〉 aluminum alloy 6061 .aluminum alloy7075〉 brass〉 copper. The pitting corrosion is the main corrosion form for copper and brass. For copper,the corrosion hole is consisted of Cu2O,the presence of adsorption oxygen competing with Claccelerates the corrosion; Brass also exists pitting corrosion,while the reaction of brass and phase change materials,the formation of material adhesion on the surface of brass. Aluminum shows pitting corrosion,of which the corrosion product is cracking like and adhere to the substrate surface. Copper,brass andaluminum alloy are not suitable for the packaging materials for phase change energy storage material.Stainless steel 201 and 304 presentes good resistance to corrosion,are suitable as metal-based packaging materials for storage phase change material.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2016年第4期986-994,共9页
Journal of Synthetic Crystals
基金
青海省国际合作资助项目(2014-HZ-820)
青海省重点实验室发展专项资金(2014-Z-Y31
2015-Z-Y02)
关键词
芒硝基复合材料
相变材料
腐蚀
金属基封装材料
glauber matrix composite
phase change material
corrosion
metal-based packaging material
