Quasi in-situ time-de pendent measurement of atmospheric-induced corrosion and stress corrosion cracking on duplex stainless steel wires

摘要

Understanding of localised corrosion and stress corrosion cracking (SCC) of duplex stainless steel (DSS) in atmospheric conditions has significant importance for its use as a safe candidate container material for the storage of intermediate-level radioactive waste (ILW). Some of the UK's storage facilities are close to coastal regions, and ILW-containers are at risk of the deposition of chloride-bearing particulates. These salts become wet at certain relative humidities (RH) and form concentrated thin-film electrolytes, resulting in localised corrosion, or in the presence of tensile stresses, SCC can occur. There is limited data available about the long-term atmospheric corrosion behaviour of DSS under conditions relevant to ILW-container storage.