Compatibility of materials for macroencapsulation of inorganic phase change materials: Experimental corrosion study

被引：42
|
作者：
Ushak, Svetlana [1 ,2 ,3 ]
Marin, Paula [1 ,2 ]
Galazutdinova, Yana [1 ,2 ]
Cabeza, Luisa F. [4 ]
Farid, Mohammed M. [5 ]
Grageda, Mario [1 ,2 ,3 ]
机构：
[1] Univ Antofagasta, Dept Chem Engn & Mineral Proc, Campus Coloso,Av Univ Antofagasta, Antofagasta 02800, Chile
[2] Univ Antofagasta, Ctr Adv Study Lithium & Ind Minerals CELiMIN, Campus Coloso,Av Univ Antofagasta, Antofagasta 02800, Chile
[3] Solar Energy Res Ctr SERC Chile, Av Tupper 2007,Piso 4, Santiago, Chile
[4] Univ Lleida, GREA Innovacio Concurrent, Edifici CREA,Pere Cabrera S-N, Lleida 25001, Spain
[5] Univ Auckland, Dept Chem & Mat Engn, Private Bag 92019, Auckland 1142, New Zealand
来源：
APPLIED THERMAL ENGINEERING | 2016年 / 107卷
关键词：
Phase change materials; Salt hydrates; Interface corrosion; Bischofite; MgCl2 center dot 6H(2)O; THERMAL-ENERGY STORAGE; LATENT-HEAT STORAGE; AIR-INTERFACE CORROSION; PCM; PERFORMANCE; NITRATE; METAL; BUILDINGS; MIXTURES; STEEL;
D O I：
10.1016/j.applthermaleng.2016.06.171
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The potential of the use of salt hydrates MgCl2 center dot 6H(2)O (bischofite) with typical impurities of the Salar de Atacama as a thermal energy storage material was evaluated with special attention to its corrosion behavior. Bischofite behavior is compared with that of commercial salt MgCl2 center dot 6H(2)O. The corrosion tests were conducted with metal sheets (copper, aluminum and stainless steel) partially immersed in molten salt hydrates at a temperature of 120 degrees C during 1500 h. The results showed minimum corrosion on all the immersed surfaces of all the metals. However, very sever corrosion was observed at the salt/air interface due to a known phenomenon of oxygen enhanced corrosion usually found even with water at ambient temperature. The corrosion products were determined with scanning electron microscopy (SEM-EDX) and X-ray diffraction (XRD) technique. For salts hydrates bischofite and MgCl2 center dot 6H(2)O, the results show the formation of cuprite (Cu2O) and hematite (Fe2O3) on copper and stainless steel samples, respectively. For all cases studied in the present work, several chloride compounds were identified as corrosion products. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：410 / 419
页数：10
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