四元氯盐的制备及其腐蚀性  

Preparation and the Corrosion of the Four Mixed Chlorine

作　　者：邓小红[1] 李风[1] 邹立清[1] 刘岗[1] 马永[1] 

机构地区：[1]广东工业大学,材料与能源学院,广东广州510006

出　　处：《材料科学与工程学报》2014年第4期587-591,共5页Journal of Materials Science and Engineering

基　　金：太阳能热发电金属相变储能技术及储热锅炉研究(863课题)资助项目(No:2007AA052460)

摘　　要：采用均匀设计法,按照各氯盐不同的质量比,制备出12种不同混合成分比例的四元氯盐。通过TG-DSC的测试手段,测试其熔点、比热、潜热等物性参数,并将它们进行比较,最后优选出最佳配比,当氯化钾∶氯化钠∶无水氯化镁∶氯化锂的质量比为0.653∶0.112∶0.049∶0.186时,四元混合氯盐的熔点低至348.5℃,使用温度上限高达800℃,溶化潜热为71.03J/g,综合性能达到最优。再通过304不锈钢片与316L钢片检验该样品的腐蚀性能,通过XRD分析与差重法综合热分析测试其热稳定性,结果表明融熔盐对钢片的腐蚀性比固态盐对钢片的腐蚀性更低。Twelve samples of quaternary chlorine salt with various weight ratio were prepared by the uniform-experiment-match method. The melting point, latent heat and specific heat were tested by the TG- DSC. The results show that quaternary chlorine salt achieves optimal performance when the mass ratio of potassium chloride, sodium chloride, magnesium chloride and lithium chloride is 0. 653：0. 112 ：0. 049：0. 186. / And the melting point of the optima sample reaches 348.5℃, the boiling point reaches 800℃, and the melting latent turns to 71.03J/g. The corrosivity of the optima salt sample was tested coupled with 304 steel and 316L steel by XRD and TG-DSC. And the results show that the molten salt has a lower corrosion than the solid salt.

关 键 词：太阳能热发电 热物性 腐蚀性 混合氯盐 

分 类 号：TQ11[化学工程—无机化工]