In the past five years, extensive investigations both in the laboratory and in pilot plant units have demonstrated the suitability of aluminum alloys for evaporative desalination applications. The work covered here was sponsored in various degrees by the Office of Saline Water and involves both a fundamental electrochemical investigation carried out at the Alcoa Laboratories (1-3) and plant service experience gained at the Freeport Test Plant operated for the Aluminum Association by Dow Chemical Company at the Office of Saline Water Materials Test Center (4-8). While a variety of aluminum alloys were investigated, results are presented only for 3003, 5052 and 6063 alloys as they were evaluated most extensively in both investigations. Their performance is typical of all the alloys studied.

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