Table 12
Corrosion performance of metals for long-term encapsulation of various salt hydrate PCMs
| Metals | Recommended to encapsulate salt hydrates | Corrosion rate (mg/(cm2 a)) | Reference |
| Aluminum alloy AA6061 | Mg(NO3)2·6H2O | − | [133] |
| Aluminum alloy | Mg(NO3)2·6H2O | 2.3 | [134] |
| Carbon steel | Mixture of Mg(NO3)2·6H2O and Ca(NO3)2·4H2O | 4.6 | [135] |
| Stainless steel | NaSO4·10H2O; ZnCl2·3H2O; NaOH·1.5H2O; K2HPO4·6H2O; MgSO4·7H2O; CH3COONa·3H2O; Zn(NO3)2·4H2O; | Lower than 1.0 | [131] |
| Stainless steel 316 | Mixture of Na2HPO4·12H2O and Na2SO4·10H2O | − | [136] |
| Stainless steel 316 | CaCl2·6H2O | − | [132] |
| Stainless steel 316 | CaCl2·6H2O; Na2S·5H2O; Ca(OH)2; MgCl2·6H2O; MgSO4·7H2O | Lower than 9.9 | [137] |
| Stainless steel | CH3COONa·3H2O | Lower than 0.4 | [138] |
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