Gravimetric and surface studies on corrosion of aluminium alloy towards inhibitory effect by glycine / Nurliyana Athilah Norhaslan

Corrosion is a major issue in many industries, causing significant economic losses and safety issues. Acids used during the production or cleaning process in industries may contribute to metal corrosion. In this research, gravimetric and surface studies have been performed on aluminium alloy (Al alloy). Standard Glycine powder was used and characterized using Fourier-Transform Infrared Spectroscopy (FT-IR). The result shows that Glycine has important functional groups such as N, C and O which may contributes to anti corrosion properties. Corrosion inhibition of Al alloy was studied in different corrosive media in various concentrations (0.10 M, 0.25 M and 0.50 M). The inhibitor solution used was at different concentrations of 1,2,3,4,5 g/L at room temperature. From the result, as the inhibitor concentration increased, the corrosion rate decreases while the inhibition efficiency increases. The corrosion activity of Al alloy in all concentrations of HCl is higher than H2SO4.As for corrosion inhibition efficiency, H2SO4 shows a higher percentage of 90.40% at concentration 0.25 M compared to HCl. Surface morphology shows significant corrosion effect in HCl compared to H2SO4. The finding from this study could be a good reference in determining the corrosion behavior of amino acid-based corrosion inhibitor in variation of acid solution.