Oxidation and corrosion behaviour of mild steel laser alloyed with nickel and chromium |
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| Authors: | A S Khanna A Gasser K Wissenbach Ming Li V H Desai W J Quadakkers |
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| Affiliation: | (1) Corrosion Science and Engineering, Indian Institute of Technology, 400076 Bombay, India;(2) Fraunhofer Institute for Laser Technique, D-52074 Aachen, Germany;(3) Material Science Programme, University of Central Florida, 32816-0993, USA;(4) IRW, Research Centre Juelich, D-52425 Juelich, Germany |
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| Abstract: | Surface alloys were made on mild steel, coated with nickel and chromium using laser surface alloying. Mild steel was coated with a composite layer of nickel and chromium using the plasma technique. This was followed by laser irradiation using a continuous carbon dioxide laser. Oxidation and corrosion behaviour of these alloys was then determined by carrying out oxidation in air at 800 °C and corrosion tests at room temperatures in 1 n H2SO4. With a 75  m layer of nickel and chromium each, it was possible to make surface alloys on mild steel, which had a chromium concentration of 6–7 wt%, but the nickel concentration varied from 10–20 wt%. Oxidation behaviour improved significantly over the as-coated specimen and aqueous corrosion improved considerably. |
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