Add time:08/01/2019         Source:sciencedirect.com

Thermochemical heat storage exploits thermal solar energy to produce sustainable residential heating, obtained by exothermal reaction between bromides and water vapour. A protocol to test the corrosion of surrounding materials is discussed in the case of SrBr2 contacting copper or steel. Corrosion depth >1 mm y−1 is found for steel in conditions where the salt remains mostly solid, due to a reaction between SrBr2 and atmospheric CO2 that produces HBr. Temperature and the dissolution of the salt (deliquescence) also play a key role. Potentiodynamic tests, the limitations of which are discussed, corroborate the salt degradation in the case of steel.

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