Properties of TSA in natural seawater at ambient and elevated temperature
Journal article, Peer reviewed
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OriginalversjonMaterials and corrosion - Werkstoffe und Korrosion. 2019, 70 (2), 293-306. 10.1002/maco.201810385
Electrochemical properties of thermal sprayed aluminium (TSA) coating were investigated in natural seawater at elevated temperatures with and without cathodic protection (CP). TSA has a low current density requirement when connected to a CP system, regardless of temperature. The corrosion rates for TSA were found to be low both under CP and at open circuit potential at temperatures in the range 20–90 °C. However, measurements of the TSA coating thickness before and after exposure indicate there might be chemical dissolution of the coating. However, this has not been reported anywhere else in the literature, so more data is necessary to conclude. Post exposure analysis indicated calcareous deposits on the TSA exposed for up to 280 days. In SEM small amounts were found, and the type of deposits were dependent on temperature, with the deposits being more based on Mg at higher temperatures.