Effect of Mn and Zn Inhibitors on the Corrosion of Incoloy 800H in the MgCl2–KCl Molten Salt

  • Yuxiang Peng
  • Ramana G. ReddyEmail author
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)


The corrosion evaluations of Incoloy 800H (800H) alloys with Mn and Zn inhibitors were performed separately in MgCl2–KCl for 100 h at 973 K under high-purity argon atmosphere. The corrosion rates were estimated based on the weight loss of 800H samples, which were 0.003 ± 0.038 and 0.152 ± 0.022 mg/cm2/day with Mn and Zn inhibitors, respectively. The negative value of the corrosion rate indicates the increase in weight of the 800H sample after corrosion. The increased weight was attributed to the deposition of inhibitor on the surface of 800H. Besides, the composition of deposition was investigated using the scanning electron microscopy (SEM) equipped with an energy dispersive spectrometer (EDS). Both the Mn and Zn inhibitors protected 800H alloy from further corrosion, especially the Mn being better of the two.


Incoloy 800H Molten salt MgCl2–KCl Corrosion Inhibitor Zn Mn 



The authors are pleased to acknowledge the financial support from the Department of Energy and the ACIPCO for this research project. We also thank the Department of Metallurgical and Materials Engineering, The University of Alabama for providing the experimental and analytical facilities.


  1. 1.
    Williams D (2006) Assessment of candidate molten salt coolants for the NGNP/NHI heat-transfer loop, Oak Ridge National Laboratory (ORNL). Oak Ridge, TN (United States)CrossRefGoogle Scholar
  2. 2.
    Anderson M, Sridhara K, Allen T, Peterson P (2012) Liquid salt heat exchanger technology for VHTR based applications, University of Wisconsin, Madison, WI (United States); University of California at Berkeley, CA (United States); Battelle Energy Alliance, LLCGoogle Scholar
  3. 3.
    Mantha D, Wang T, Reddy R (2012) Thermodynamic modeling of eutectic point in the LiNO3-NaNO3-KNO3 ternary system. J Phase Equilib Diff 33(2):110–114CrossRefGoogle Scholar
  4. 4.
    Reddy RG, Wang T, Mantha D (2012) Thermodynamic properties of potassium nitrate–magnesium nitrate compound [2KNO3·Mg (NO3)2], Thermochim Acta 531:6–11Google Scholar
  5. 5.
    Wang T, Mantha D, Reddy R (2012) High thermal energy storage density LiNO3–NaNO3–KNO3–KNO2 quaternary molten salt for parabolic trough solar power generation. Energy Technol 73–84Google Scholar
  6. 6.
    Wang T, Mantha D, Reddy RG (2012) Thermal stability of the eutectic composition in LiNO3–NaNO3–KNO3 ternary system used for thermal energy storage. Sol Energ Mat Sol C 100:162–168CrossRefGoogle Scholar
  7. 7.
    Wang T, Viswanathan S, Mantha D, Reddy RG (2012) Thermal conductivity of the ternary eutectic LiNO3–NaNO3–KNO3 salt mixture in the solid state using a simple inverse method. Sol Energ Mat Sol C 102:201–207CrossRefGoogle Scholar
  8. 8.
    Gomez-Vidal JC, Tirawat R (2016) Corrosion of alloys in a chloride molten salt (NaCl-LiCl) for solar thermal technologies. Sol Energy Mater Sol Cells 157:234–244CrossRefGoogle Scholar
  9. 9.
    Vignarooban K, Pugazhendhi P, Tucker C, Gervasio D, Kannan AM (2014) Corrosion resistance of Hastelloys in molten metal-chloride heat-transfer fluids for concentrating solar power applications. Sol Energy 103:62–69CrossRefGoogle Scholar
  10. 10.
    Sridharan K, Anderson M, Allen T, Corradini M (2012) Liquid salts as media for process heat transfer from VHTR’s: forced convective channel flow thermal hydraulics, materials, and coating. University of Wisconsin, MadisonGoogle Scholar
  11. 11.
    Susskind H, Hill F, Green L, Kalish S, Kukacka L, McNulty W, Wirsing E Jr (1960) Corrosion studies for a fused salt-liquid metal extraction process for the liquid metal fuel reactor. Brookhaven National Lab, Upton, NYCrossRefGoogle Scholar
  12. 12.
    Sadananda K, Shahinian P (1983) Creep crack growth behavior of several structural alloys. Metall Trans A 14(7):1467–1480CrossRefGoogle Scholar
  13. 13.
    Olson L, Sridharan K, Anderson M, Allen T (2011) Nickel-plating for active metal dissolution resistance in molten fluoride salts. J Nucl Mater 411(1–3):51–59CrossRefGoogle Scholar
  14. 14.
    Taxil P, Mahenc J (1981) The preparation of corrosion-resistant layers by the electrolytic deposition of tantalum on nickel and stainless steel. Corros Sci 21(1):31–40CrossRefGoogle Scholar
  15. 15.
    He X, Song J, Tan J, Zhang B, Xia H, He Z, Zhou X, Zhao M, Liu X, Xu L (2014) SiC coating: an alternative for the protection of nuclear graphite from liquid fluoride salt. J Nucl Mater 448(1–3):1–3CrossRefGoogle Scholar
  16. 16.
    Sellers R, Cheng W, Anderson M, Sridharan K, Wang C, Allen T (2012) Materials corrosion in molten LiF-NaF-KF eutectic salt under different reduction-oxidation conditions. In: Proceedings of ICAPP, 24–28Google Scholar
  17. 17.
    Sellers RS (2012) Impact of reduction-oxidation agents on the high temperature corrosion of materials in LiF-NaF-KF. University of Wisconsin–MadisonGoogle Scholar
  18. 18.
    Li X-L, He S-M, Zhou X-T, Huai P, Li Z-J, Li A-G, Yu X-H (2015) High-temperature corrosion behavior of Ni–16Mo–7Cr–4Fe superalloy containing yttrium in molten LiF–NaF–KF salt. J Nucl Mater 464:342–345CrossRefGoogle Scholar
  19. 19.
    Wang T, Reddy RG (2017) Corrosion of nickel-based alloys in ultra-high temperature heat transfer fluid. High Temp Mater Processes (London) 36(3):267–277Google Scholar
  20. 20.
    Olson LC, Garcia DB, Fuentes R, Marinez RM, Reddy RG, Gray J, Cho HS, Van ZJ (2016) Fundamental corrosion studies in high-temperature molten salt systems for next generation concentrated solar power systems. Savannah River National Laboratory, SavannahGoogle Scholar
  21. 21.
    Ozeryanaya I (1985) Corrosion of metals by molten salts in heat-treatment processes. Met Sci Heat Treat 27(3):184–188CrossRefGoogle Scholar

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© The Minerals, Metals & Materials Society 2020

Authors and Affiliations

  1. 1.Department of Metallurgical and Materials EngineeringThe University of AlabamaTuscaloosaUSA

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