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Hot Corrosion Behaviour of Detonation-Gun Sprayed Cr3C2–NiCr Coating on Inconel-718 in Molten Salt Environment at 900 °C

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Abstract

Detonation gun sprayed Cr3C2–NiCr coating was deposited on nickel-based superalloy Inconel-718. Hot corrosion studies were conducted on uncoated as well as Cr3C2–NiCr coated superalloy in 75 wt% Na2SO4 + 25 wt% NaCl salt environment at 900 °C for 50 cycles. The thermo-gravimetric technique was used to establish kinetics of corrosion. X-ray diffraction and scanning electron microscopy/energy-dispersive X-ray analysis techniques were used to analyze the corrosion products. The uncoated superalloy suffered intense spalling, while the Cr3C2–NiCr coating provided good protection against hot corrosion in the given salt environment.

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Authors and Affiliations

  1. Department of Mechanical Engineering, SVIT, Vasad, Gujarat, India

    Sekar Saladi

  2. Department of Mechanical Engineering, SVNIT, Surat, Gujarat, India

    Jyoti Menghani

  3. Department of Metallurgical and Materials Engineering, IIT Roorkee, Roorkee, Uttarakhand, India

    Satya Prakash

Authors
  1. Sekar Saladi
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  2. Jyoti Menghani
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  3. Satya Prakash
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Correspondence to Jyoti Menghani.

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Saladi, S., Menghani, J. & Prakash, S. Hot Corrosion Behaviour of Detonation-Gun Sprayed Cr3C2–NiCr Coating on Inconel-718 in Molten Salt Environment at 900 °C. Trans Indian Inst Met 67, 623–627 (2014). https://doi.org/10.1007/s12666-014-0383-x

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  • DOI: https://doi.org/10.1007/s12666-014-0383-x

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