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The influence of zirconium additions on the corrosion of magnesium
Affiliation:1. CAST Cooperative Research Centre, Australia;2. Department of Materials Engineering, Monash University, Clayton, VIC 3800, Australia;3. CSIRO Process Science and Engineering, Clayton, VIC 3168, Australia;4. Magontec Limited, Sydney, NSW 2000, Australia;1. Environmental Corrosion Center, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;2. Korea Institute of Materials Science, Changwon 641-831, Republic of Korea;1. Department of Physics and Materials Science, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China;2. Department of Physics and Jiangsu Key Laboratory for Advanced Metallic Materials, Southeast University, Nanjing 211189, China;1. CAST Cooperative Research Centre, Australia;2. Department of Materials Engineering, Monash University, Clayton, VIC 3800, Australia;3. CSIRO Process Science and Engineering, Clayton, VIC 3168, Australia;1. Departamento de Ciencia de Materiales, Facultad de Ciencias Químicas, Universidad Complutense, 28040 Madrid, Spain;2. Helmholtz Zentrum Geesthacht, Magnesium Innovation Centre, Institute of Materials Research, Max-Planck-Str. 1, D-21502 Geesthacht, Germany;3. Departamento de Aleaciones Ligeras, Fundación CIDAUT, Parque Tecnológico de Boecillo, 47151 Boecillo, Valladolid, Spain
Abstract:Sixteen custom binary Mg–Zr alloys and four commercial Zr-containing Mg-alloys were used to investigate the role of Zr on the corrosion of Mg. Mg–Zr alloys were manufactured with a range of different Zr concentrations. It was observed that the Mg–Zr alloys with a smaller mean Zr particle size had more Zr dissolved in solid solution. Both the Zr in solid solution and in metallic particle form were observed to have a deleterious effect on the corrosion rate of Mg. However, this deleterious effect is less pronounced to effect in alloys with multiple alloying additions.
Keywords:A. Magnesium  A. Zirconium  B. Polarisation  B. Weight loss  B. SEM
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