Work undertaken to elucidate failures of standard austenitic stainless steels in indoor swimming pool atmospheres which have occurred in recent years in Europe and North America is described. The unusual feature of these failures is that they occurred by a stress corrosion cracking (SCC) mechanism at ambient temperature. Conditions which have given rise to room temperature SCC in laboratory tests are described and mechanisms which may give rise to such conditions in practice are postulated. The work described also involved a survey of conditions in indoor swimming pools as well as experimental work on a range of stainless steels in various environments.
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