Effect of yttrium on the corrosion behaviour of 09CrCuSb alloy in concentrated sulphuric acid |
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| Affiliation: | 1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;2. Technology Center of Ma''anshan Iron and Steel Co. Ltd., Ma''anshan, Anhui 243000, China;1. School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, P.O. Box 14395-731, Tehran, Iran;2. Center of Excellence for High Performance Materials, University of Tehran, P.O. Box 14395-731, Tehran, Iran;1. Faculty of Mechanical Engineering, K.N. Toosi University of Technology, Tehran, Iran;2. Faculty of Materials Science and Engineering, K.N. Toosi University of Technology, Tehran, Iran;3. School of Nano-Science, Institute for Research in Fundamental Sciences (IPM), P.O. Box 19395-5531, Tehran, Iran;4. School of Computer Engineering, Iran University of Science and Technology, Tehran, Iran;5. Young Researchers and Elite Club, Rasht Branch, Islamic Azad University, Rasht, Iran;1. Angang Steel Company Limited, Anshan, Liaoning, 14009, China;2. School of Materials Science and Engineering, Herbert Gleiter Institute of Nanoscience, Nanjing University of Science and Technology, Nanjing, 210094, China |
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| Abstract: | The effect of yttrium on the corrosion behaviour of 09CrCuSb alloy (ND steel) in concentrated sulphuric acid at 383 K has been investigated. The results demonstrate that addition of 0.15 wt.% Y effectively improves the corrosion resistance of such alloy. By observing the surface morphology and cross-section of the scale, it is found that Y addition refines the corrosion product, and improves the adhesion ability between the scale and the matrix. The electrochemical test exhibits a decrease passive currents as well as a higher passive and charge transfer resistance of the Y-modified alloy. |
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