Corrosion Inhibition of Aluminum in 0.1M HCL by Nephelium lappaceum (Rambutan) Peel Extract
Corrosion control of metals is about technical, economic, environmental, and aesthetic importance. Synthetic corrosion inhibitors are toxic to environment and human life. Thus, the searches for natural corrosion inhibitors are essential as they are biodegradable and non toxic. The purpose of this study is to investigate the ability of Nephelium lappaceum peel extract as a corrosion inhibitor of aluminum in 0.1M HCl solutions. Obtained data from gravimetric and thermometric analysis has shown the value of inhibition efficiency (% IE) is proportional to added inhibitor concentration and inversely proportional to the temperature. Occurred inhibition mechanism was in the form of inhibitor adsorption process on aluminum surface that allegedly preceded by physical adsorption. The SEM study also confirmed there were adsorptions of extracted inhibitor molecules onto aluminum surface. Therefore, from the observational results obtained, it can be concluded that Nephelium lappaceum peel extract was an attractive candidate for the natural corrosion inhibitor.
Azmi Mohamed Yusof
M. Norzila et al., "Corrosion Inhibition of Aluminum in 0.1M HCL by Nephelium lappaceum (Rambutan) Peel Extract", Applied Mechanics and Materials, Vol. 661, pp. 14-20, 2014