Piper betle extract as an eco-friendly corrosion inhibitor for aluminium alloy in hydrochloric acid media

• W.B. Wan Nik¹, K. Ravindran^1,2, A.A. Al-Amiery³, V.O. Izionworu⁴, O.S.I. Fayomi⁵, E. Berdimurodov⁶, W. Daoudi⁷, F. Zulkifli¹ and D.Y. Dhande⁸

¹ Faculty of Ocean Engineering Technology and Informatics, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia
² Galtech Engineering (M) Sdn. Bhd, Pusat Perniagaan Manjung Point 2, 32040 Seri Manjung, Perak, Malaysia
³ Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
⁴ Department of Chemical/Petrochemical Engineering Rivers State University, Nkpolu-Oroworukwo, Port Harcourt, Nigeria
⁵ Department of Mechanical and Biomedical Engineering, Bells University of Technology, 500001 Ota, Nigeria
⁶ Faculty of Chemistry, National University of Uzbekistan, Tashkent, 100034, Uzbekistan
⁷ Laboratory of Materials and Environment, Dept of Chemistry, Multidisciplinary Faculty of Nador, University of Mohamed 1, 60700 Nador, Morocco
⁸ AISSMS College of Engineering, Pune, 411001, India

Abstract: Corrosion poses a significant challenge in our daily lives across various mediums, conditions, and factors. Although there have been numerous studies and investigations on environmentally friendly corrosion inhibitors, the available data and evidence on the effectiveness of Piper betle extract as a corrosion inhibitor are still insufficient. In this study, we explored the potential of green inhibitors, specifically Piper betle extract, for inhibiting corrosion in HCl on aluminium alloy. Sequential maceration using Piper betle extract was employed, and a weight loss experiment was conducted by immersing the aluminium alloy in HCl for 24 hours at various concentrations. The corrosion products and microstructures were then characterized using Scanning Electron Microscopy (SEM). The results obtained from this study, based on weight loss measurements, indicate a significant correlation between the inhibitory action and the amount of the inhibitor. However, our study found that the Piper betle extract inhibitor did not surpass the performance of the industrial inhibitor. When the concentration varied from 0 to 2500 ppm, the inhibition efficiencies of Piper betle extract and the industrial inhibitor increased up to 47% and 90%, respectively. Fourier Transform Infrared Spectroscopy (FTIR) revealed that hydroxychavicol is the primary active compound in Piper betle extract, and the presence of aromatic hydroxyl compounds contributes significantly to the corrosion inhibition activity.

Keywords: Piper betle extract, aluminium alloy, inhibitor, corrosion

Int. J. Corros. Scale Inhib., 2023, 12, no. 3, 948-960
doi: 10.17675/2305-6894-2023-12-3-9

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