The influence of heat treatment on the microstructural, mechanical and corrosion behaviour of cold sprayed SS 316L coatings
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The present study evaluates the response of cold sprayed SS 316L coatings on mild steel substrate to aqueous corrosion in a 0.1 N HNO3 solution as determined using polarization tests. The corrosion behaviour of the SS 316L coating was studied not only in the as-coated condition, but also after heat treatment at 400, 800 and 1,100 °C. Heat treatment reduced the porosity, improved inter-splat bonding, increased the elastic modulus and more importantly increased the corrosion resistance of the cold sprayed SS 316L coating.
KeywordsCorrosion Resistance Corrosion Behaviour Heat Treatment Temperature HNO3 Solution Polarization Test
The authors wish to thank Director, International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI) for granting permission to publish this paper. We also express our gratitude to the reviewers whose comments have certainly improved the quality of the paper.
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