Abstract
Abstract This paper describes the effect of extended sensitization heat treatment (650°C) and applied potential on the corrosion behavior and the stress corrosion cracking (SCC) of low-carbon AISI 316L (UNS S31603) stainless steel (0.02%C) in a concentrated lithium hydroxide solution at 95°C. The results are compared to the behavior of solution-annealed material under the same conditions. In general, there is a fairly clear effect of prolonged heat treatment times on the material, and its susceptibility to intergranular attack (IGA) and SCC, as determined in slow strain rate tests, increases with increasing times of sensitization heat treatment. When the heat treatment extends to 100 h or more, the potential range in which IGA is observed extends to lower potentials (−300 mV SCE, open-circuit conditions) compared to the solution-annealed material. On the other hand, SCC is observed on both materials in approximately the same potential ranges (i.e., above approximately −100 mV SCE). However, both intergran...
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