Journal
CORROSION SCIENCE
Volume 166, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2020.108473
Keywords
316SS; NaCl-MgCl2; Molten salt; Corrosion resistance; Mechanism
Funding
- National Key R&D Program of China [2018YFB1501002]
- Qinghai Major Science and Technology Projects [2017-GX-A3]
- Transformational Technologies for Clean Energy and Demonstration, Strategic Priority Research Program of the Chinese Academy of Sciences [XDA21080000]
- Thorium Molten Salt Reactor Nuclear Energy System, Strategic Priority Research Program of the Chinese Academy of Sciences [XDA02020000]
- K.C. Wong Education Foundation [GJTD-2018-10]
- Changzhou Science and Technology Project [CZ20190017]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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The effects of temperature on the corrosion of 316 stainless steel (316SS) in purified NaCl-MgCl2 eutectic salt under Ar were investigated through immersion test. The corrosion of samples accelerated and intergranular corrosion became obvious with increased temperature. The corrosion of 316SS was attributed to the selective dissolution of Cr, and corrosion had strong temperature dependence. The corrosion mechanism under the NaCl-MgCl2 eutectic salt was the combined effect of a dissolution mechanism with matrix metal element, which was attributed to the accelerating effect of surface chromium-dissolution and intergranular-diffusion rates with increased molten salt temperature.
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