Hot Corrosion Studies on HVOF Coated Alloy A-286 in Molten Salt Environment

• Autorzy: Muthu S. M. , Arivarasu M. , Jithesh K. , Vignesh M. , Dhinakaran V. , Suresh Kumar P.

Identyfikatory

DOI

10.24425/amm.2024.149790

• Języki publikacji: EN

Abstrakty

EN

The corrosion resistance Cr₃C₂-25%NiCr and Ni-20%Cr coatings were deposited on the alloy A-286 by high-velocity oxy-fuel (HVOF) coating, and the high-temperature corrosion features were evaluated at 700 and 850°C in Na₂SO₄-5%NaCl-7.5%NaVO₃ atmosphere. Deposited coatings are dense and well-adherent to the substrate. A scanning electron microscope (SEM) is used to analyze the structure of the corroded samples. Results showed that Cr₃C₂-25%NiCr coating provides better resistance to corrosion at 700°C, which is attributed to the protective Cr₂O₃ development. The coated metal was exposed at 850°C, and a higher corrosion rate was observed compared to 700°C, indicating that the temperature influenced the oxidation rate. The coating failure (crack) was noticed on the Cr₃C₂-25%NiCr coated surface when exposed at 850°C, and no damages are in the Ni-20%Cr coating.

Słowa kluczowe

EN

alloy A-286; high-velocity oxy-fuel coating; high temperature corrosion; corrosion kinetics; morphology

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2024
• Tom: Vol. 69, iss. 2
• Strony: 613--623
• Opis fizyczny: Bibliogr. 25 poz., fot., rys., tab., wzory

Twórcy

autor

Muthu S. M.

• Chennai Institute of Technology, Centre for Additive Manufacturing, Chennai-600 069, India

autor

Arivarasu M.

• Vellore Institute of Technology, Centre for Innovative Manufacturing Research, Vellore-632 014, India

autor

Jithesh K.

• Adi Shankara Institute of Engineering and Technology Kalady, Department of Mechanical Engineering, India

autor

Vignesh M.

• Vellore Institute of Technology, School of Mechanical Engineering, Vellore-632014, India

autor

Dhinakaran V.

• Chennai Institute of Technology, Centre for Additive Manufacturing, Chennai-600 069, India

autor

Suresh Kumar P.

• Ramco Institute of Technology, Department of Mechanical Engineering, Rajapalayam, India

Bibliografia

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