Enhanced corrosion resistance of high strength Mg–3Al–1Zn alloy sheets with ultrafine grains in a phosphate-buffered saline solution |
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| Affiliation: | 1. Department of Nanomaterials Engineering, College of Nanoscience & Nanotechnology, Pusan National University, 50 Cheonghak-ri, Samnangjin-eup, Miryang-si, Kyongnam 627-706, Republic of Korea;2. Nano-Analysis Center, Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul 130-650, Republic of Korea;3. School of Materials Science and Engineering, Hongik University, 2639 Sejong-ro, Seong 339-701, Republic of Korea;4. Department of Materials Science and Engineering, Hongik University, Mapo-gu, Sangsu-dong 72-1, Seoul 121-791, Republic of Korea;1. Department of Materials Science and Engineering, Brockhouse Institute for Materials Research and Canadian Centre for Electron Microscopy, McMaster University, Hamilton, Ontario, Canada;2. Department of Chemistry and Surface Science Western, Western University, London, Ontario, Canada;1. Department of Materials Science and Engineering, Faculty of Engineering, Kyushu University, Fukuoka 819-0395, Japan;2. WPI, International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 819-0395, Japan;3. Graduate School of Science and Engineering for Research, University of Toyama, Toyama 930-8555, Japan;1. School of Materials, The University of Manchester, Manchester, M13 9PL, UK;2. The EPSRC Centre – LiME, BCAST, Brunel University, Uxbridge, London, UB8 3PL, UK;3. Innoval Technology Ltd., Beaumont Close, Banbury, Oxon, OX16 1TQ, UK |
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| Abstract: | The corrosion behaviour of ultrafine grained AZ31Mg alloy sheets with very high strength, which were prepared by high-ratio differential speed rolling (HRDSR) technique, was studied in a phosphate-buffered saline solution. The corrosion resistance was greatly improved after HRDSR. This result was attributed to the enhanced stability of the Mg(OH)2 layer due to the grain refinement and precipitation of various types of P-containing compounds on the stabilised Mg(OH)2 layer. The HRDSR technique has a good potential to be used for the development of magnesium sheets with good combination of mechanical and biocorrosion properties. |
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| Keywords: | A Magnesium B EIS B Polarization B STEM C Passive films |
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