Influence of metallurgical states on the corrosion behaviour of Al–Zn PVD coatings in saline solution |
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| Affiliation: | 1. School of Materials Science and Engineering, North University of China, Taiyuan 030051, China;2. School of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;1. Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, USA;2. Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN, USA;1. Institute of Nanochemistry and Nanobiology, School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, BaoShan District, Shanghai 200444, China;2. Department of Chemical Engineering, School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai 200444 China;1. WA School of Mines: Minerals, Energy & Chemical Engineering, Curtin University, Perth, Western Australia 6102, Australia;2. Collaborative Innovation Center of Sustainable Energy Materials, Guangxi Key Laboratory of Electrochemical Energy Materials, State Key Laboratory of Processing for Non-ferrous Metal and Featured Materials, Guangxi University, Nanning 530004, China |
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| Abstract: | The objective of this study is to define the corrosion behaviour of different Al–Zn coatings, deposited by magnetron sputtering. The coatings exhibiting the best corrosion resistance are then characterised during long immersion tests in neutral 5 wt.% NaCl solution.The results show that the corrosion behaviour is strongly dependent on the zinc content. The evolution of the degradation mechanism is also related to the microstructure of the alloys. These alloys present very interesting properties for steel protection. Nevertheless, the zinc content has to be well defined in order to avoid a high dissolution of the coating. |
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| Keywords: | A Alloy A Aluminium A Metal coatings B Polarization B SEM C Cathodic protection |
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