Abstract
The intergranular corrosion (IGC) character of tin-added B316LX and the influence of tin addition on IGC susceptibility were investigated by DL-EPR, oxalic acid etch test and transmission electron microscopy. IGC susceptibility of B316LX is mainly caused by the precipitation of M 23C6 carbide and intermetallic Laves phase. DL-EPR test is unsuitable to evaluate the IGC susceptibility of B316LX with long-time sensitization, because more carbides and intermetallic phases are formed at grain boundaries and inside the grains, which induce more severe IGC and pits attacks. Tin addition increases the IGC susceptibility, maybe due to diffusion of tin toward grain boundaries.
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This work was financially supported by the National Natural Science Foundation of China (Nos. 51501041, 51131008 and 51371053), China Postdoctoral Science Foundation (No. 2013M541463), National Key Technology R&D Program (No. 2012BAE04B00), and Doctoral Fund of Ministry of Education of China (No. 20120071110013).
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Sun, M., Yang, YY., Luo, M. et al. Investigation of Susceptibility to Intergranular Corrosion of Tin-Added Austenitic Stainless Steel. Acta Metall. Sin. (Engl. Lett.) 28, 1183–1189 (2015). https://doi.org/10.1007/s40195-015-0311-z
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DOI: https://doi.org/10.1007/s40195-015-0311-z