Hot Corrosion Studies on HVOF Coated Alloy A-286 in Molten Salt Environment-Reference-Cited by-同舟云学术

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

Published:2024-06-21 Issue: Volume: Page:613-623
ISSN:2300-1909
Container-title:Archives of Metallurgy and Materials
language:pl
Short-container-title:

Author:

A. Ananthi,Arivarasu M.¹,Jithesh K.²,Vignesh M.³,Dhinakaran V.⁴,Suresh Kumar P.⁵

Affiliation:

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

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

3. Vellore Institute of Technology, School of Mechanical Engineering, Vellore-632014, India

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

5. Ramco Institute of Technology, Department of Mechanical Engineering, Rajapalayam, India

Abstract

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.

Publisher

Polish Academy of Sciences Chancellery

Link

https://journals.pan.pl/Content/131902/AMM-2024-2-38-Arivarasu.pdf