Recieved:

21/10/2023

Accepted:

15/12/2023

Page: 

873

883

doi:

http://dx.doi.org/10.17515/resm2023.55ma1021rs

Views:

822

Valorized rice husk as green corrosion inhibitor for Al 6061 in 1M HCl

Peter Ikubanni1, Makanjuola Oki1,2, Adeolu Adediran1, Sarah Akintola3, Adekunle Adeleke4, Ikechukwu Anyim1, Olanrewaju Adesina5, Lawrence Efenovwe1

1Department of Mechanical Engineering, Landmark University, Omu-Aran, Nigeria
2Greenfield Creations Ltd., Benue Close, Agbara Industrial Estate, Agbara, Nigeria
3Department of Petroleum Engineering, University of Ibadan, Ibadan, Nigeria
4Department of Mechanical Engineering, Nile University of Nigeria, Abuja, Nigeria
5Department of Mechanical Engineering, Redeemer’s University, Ede, Nigeria

Abstract

This study investigated the inhibition characteristics of rice husk (RH) on corrosion of Aluminum 6061 in 1M hydrochloric acid. Gravimetric analysis and Scanning Electron Microscopy (SEM)/ Energy Dispersive X-ray analysis (EDX) as well as electrochemical studies revealed the potency of RH as a good inhibitor of the corrosion of Al 6061 in 1M HCl. Fourier Transform Infrared Spectroscopy (FTIR) indicated that –OH, C=C, and C=O with signals at (3317.19, 2932.9, 2848.2), (1631.8) and (1105.73, 1030.2, 447.15), respectively in RH were the viable active functional groups which adsorbed on the metal surface to effect reduction of corrosion rates. However, literature suggested the presence of amorphous silica in RH which served as a complimentary corrosion inhibitor. The corrosion current density of Al 6061 was reduced to 3.46 × 10−7 A/cm2 at 24 h as against 9.27 × 10−7 A/cm2 at the commencement of the potentiodynamic polarization measurements in inhibited 1M HCl. The control specimens exhibited an average corrosion rate of 3.86 × 10−6 A/cm2 in HCl solution at the start of this investigation as compared to the corrosion rate of 3.46 × 10−7 A/cm2 at 24 h of exposure in 5 mg RH- inhibited HCl. The obtained results gave a corrosion inhibition efficiency of about 90 to 92%.

Keywords

Corrosion inhibitor; Rice husk; Al 6061; FTIR; SEM/EDAX; Gravimetric and potentiodynamic; Polarization analyses

Cite this article as: 

Ikubanni P, Oki M, Adediran A, Akintola S, Adeleke A, Anyim I, Adesina O, Efenovwe L. Valorized rice husk as green corrosion inhibitor for Al 6061 in 1M HCl. Res. Eng. Struct. Mater., 2024; 10(3): 873-883.
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