Abstract
Abstract The AA5083 (Aluminium alloy) and AA5083 – MWCNT (1.5 wt %) was fabricated using compo-casting method to study the corrosion behavior. Field-emission scanning electron microscope, X-RD and EDS was performed to check the dispersion of MWCNT into the developed composite. Corrosion behavior of aluminium alloy in the absence and presence of MWCNT reinforced composites in 1 N sodium hydroxide was studied by conventional weight loss method, electrochemical impedance spectroscopy and potentiodynamic polarisation methods. Results showed that reinforced alloy have lower corrosion rates compared to unreinforced alloy. The experiments were performed by changing immersion time from 1- 6 hours at ambient temperatures. The results show that at ambient temperature the AA5083 – MWCNT have better corrosion resistance than the AA5083 matrix material. Atomic force microscopy was performed to understand the corrosion mechanism of the MWCNT reinforced composite.
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