Corrosion characterization of optimized Zr02-Sio2 mixed nanotubes coated on aluminium alloy AA3003 / Shalini Devi Ramaiya

Shalini Devi, Ramaiya (2018) Corrosion characterization of optimized Zr02-Sio2 mixed nanotubes coated on aluminium alloy AA3003 / Shalini Devi Ramaiya. Masters thesis, University of Malaya.

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      Abstract

      Aluminium (Al) alloys are most important materials for the applications in cutting tools, engine block, as well as marine and aerospace components. In the present study, surface modification of Al alloy series 3, which known as aluminium-manganese alloy specifically AA3003, was carried out by deposition of a Zr-Si thin film as a coating layer using physical vapor deposition magnetron sputtering (PVDMS) method. Well-adhered ZrO2-SiO2 mixed nanotubular arrays were successfully grown on AA3003 by anodization method, then by heat treatment using temperature in the range of 500–700 °C for 1.5 h under atmospheric condition. The surface wettability, microhardness and corrosion behavior were studied. From the microstructural analysis, the average length and diameter of the optimized nanotubular arrays ranged from 0.6 μm and 0.5 μm. For the 600 °C annealed sample with the strongest adhesion, the scratch length, failure point and adhesion strength were 985.94 μm, 812.88μm and 2700.28 mN, respectively. Besides, the annealed coating showed the highest wettability (lowest contact angle value). Potentiodynamic polarization results indicated that the corrosion rate decreased after deposition of Zr-Si thin film, anodization and thermal treatment compared to the bare substrate

      Item Type: Thesis (Masters)
      Additional Information: Research Report (M.A.) - Faculty of Engineering, University of Malaya, 2018.
      Uncontrolled Keywords: Aluminium (Al) alloys; Physical vapor deposition magnetron sputtering (PVDMS); Alloy specifically AA3003; Well-adhered ZrO2-SiO2 mixed nanotubular
      Subjects: T Technology > TJ Mechanical engineering and machinery
      Divisions: Faculty of Engineering
      Depositing User: Mrs Rafidah Abu Othman
      Date Deposited: 06 Feb 2020 03:18
      Last Modified: 06 Feb 2020 03:19
      URI: http://studentsrepo.um.edu.my/id/eprint/10027

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