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Effect of Heat Treatment on Corrosion Behaviour of Welded AA6061 Aluminium Alloy in Seawater

Nur Azhani, Abd Razak and Juliawati, Alias and L. H., Shah and M., Ishak (2012) Effect of Heat Treatment on Corrosion Behaviour of Welded AA6061 Aluminium Alloy in Seawater. In: 15th International Conference on Advances in Materials & Processing Technologies, 23-26 September 2012 , Wollongong, Australia. .

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The effect of various heat treatments on the corrosion behaviour of welded AA6061 aluminium alloy was investigated. Gas tungsten arc welding (GTAW) was used for welding butt joint specimens. Corrosion behaviour was determined in seawater solution using potentiodynamic polarization method. Microstructure and compositional analysis of base metal (BM) and weld metal (WM) was studied with scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS). The result indicated that BM consists of Fe-rich coarse intermetallic particles that behave as cathodic sites with respect to the matrix. Tafel plot showed that WM is cathode and give better corrosion resistance in different heat treatment compared to BM. Localized corrosion was observed on the corroded surfaces by SEM.

Item Type: Conference or Workshop Item (Speech)
Uncontrolled Keywords: Gas Tungsten Arc Welding (GTAW);Corrosion Behaviour of AA6061; Heat Treatment and Welding Process
Subjects: T Technology > TJ Mechanical engineering and machinery
Faculty/Division: Faculty of Mechanical Engineering
Depositing User: Siti Aishah Ghani
Date Deposited: 07 Nov 2012 01:37
Last Modified: 28 Aug 2018 07:54
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