Effect of excess Mg to control corrosion in molten MgCl2 and KCl eutectic salt mixture

Hanson, Kasey; Sankar, Krishna Moorthi; Weck, Philippe F.; Startt, Jacob K.; Dingreville, Remi; Deo, Chaitanya S.; Sugar, Joshua D.; Singh, Preet M.

doi:10.1016/j.corsci.2021.109914

Effect of excess Mg to control corrosion in molten MgCl₂ and KCl eutectic salt mixture

Journal Article · Wed Oct 27 00:00:00 EDT 2021 · Corrosion Science

DOI:https://doi.org/10.1016/j.corsci.2021.109914· OSTI ID:1834148

Hanson, Kasey ^[1]; Sankar, Krishna Moorthi ^[1]; Weck, Philippe F. ^[2]; Startt, Jacob K. ^[3]; Dingreville, Remi ^[2]; Deo, Chaitanya S. ^[1]; Sugar, Joshua D. ^[4]; Singh, Preet M. ^[1]

Georgia Inst. of Technology, Atlanta, GA (United States)
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Georgia Inst. of Technology, Atlanta, GA (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sandia National Lab. (SNL-CA), Livermore, CA (United States)

Structural alloys may experience corrosion when exposed to molten chloride salts due to selective dissolution of active alloying elements. One way to prevent this is to make the molten salt reducing. For the KCl + MgCl₂ eutectic salt mixture, pure Mg can be added to achieve this. However, Mg can form intermetallic compounds with nickel at high temperatures, which may cause alloy embrittlement. This work shows that an optimum level of excess Mg could be added to the molten salt which will prevent corrosion of alloys like 316 H, while not forming any detectable Ni-Mg intermetallic phases on Ni-rich alloy surfaces.

View Accepted Manuscript (DOE)

Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States); Sandia National Laboratories (SNL-CA), Livermore, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0003525

OSTI ID:: 1834148

Report Number(s):: SAND--2021-14085J; 701379

Journal Information:: Corrosion Science, Journal Name: Corrosion Science Vol. 194; ISSN 0010-938X

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Effect of excess Mg to control corrosion in molten MgCl2 and KCl eutectic salt mixture

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Effect of excess Mg to control corrosion in molten MgCl₂ and KCl eutectic salt mixture