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Improvement of hardness and anti-corrosion behavior of mild steel by plasma sprayed coating of Al2O3/GO composite
Institution:1. GIET University, Gunupur, Odisha, India;2. International PranaGraf Mintech Research Centre (IGMRC), Odisha, India;3. Centurion University of Technology and Management, Odisha, India;1. Selvamm Arts and Science College, Namakkal, 637 003, Tamilnadu, India;2. Adiyamaan College of Engineering, Hosur, 635 209, Tamilnadu, India;3. Department of Physics, Periyar University, Salem, 636 011, Tamilnadu, India;1. Institute of Metallurgy and Materials Science, Polish Academy of Sciences, 25 Reymonta St., 30-059 Krakow, Poland;2. Institute of Non-Ferrous Metals Gliwice, Light Metals Division Skawina, 19 Pilsudskiego St., 32-050 Skawina, Poland;1. Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran;2. Department of Chemistry, Quchan Branch, Islamic Azad University, Quchan, Iran;1. Department of Chemistry, Government Arts College for Women, Krishnagiri, 635002, Tamil Nadu, India;2. Department of Chemistry, Kandaswami Kandars''s College, P.Velur, 638182, Tamil Nadu, India;3. PG & Research Department of Physics, Nehru Memorial College, Trichy, 621007, Tamil Nadu, India
Abstract:A robust and fast non-transferred plasma torch method was employed for developing coating of alumina (A2O3) and alumina/graphene oxide (A2O3/GO) on mild steel. Micro Raman analysis of GO confirms its spectroscopic behavior. The energy band gap of GO was determined as 3.44 eV. The successful coating formation of A2O3 and A2O3/GO (0.5 wt%) on mild steel was confirmed by X-ray diffraction analysis. Microhardness of mild steel was found to increase about 43.75% after coating with A2O3/GO (0.5 wt%) composite. The microstructure of A2O3/GO (0.5 wt%) coated mild steel represents better quality of coating and improved structural behavior. Mild steel becomes more corrosive resistance by reduction of corrosion potential (less negative than −0.05 V) after A2O3/GO (0.5 wt%) coating on it.
Keywords:Graphene oxide  Mild steel  Plasma coating  Composite
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