Effect of gamma-irradiation of yam peel powder (Dioscorea rotundata l. Poir) on metal corrosion protection in sulphuric acid environment
Authors
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Okomah Yvette Esama
Department of Environmental Management, Centre for Nuclear Energy Studies and Training, Nigeria Atomic Energy Commission, Federal University of Technology Owerri, Owerri, and Department of Energy and Applied Chemistry, Usmanu Danfodiyo University Sokoto, Nigeria
https://orcid.org/0009-0002-6665-2434
- Oguzie Emeka Emmanuel Department of Chemistry, Federal University of Technology Owerri, Owerri, Nigeria.
- Emereibeole Enos Ihediohamma Department of Environmental Management, Federal University of Technology Owerri, Owerri, Nigeria.
- Ejiogu Chibuzor Christopher Department of Environmental Management, Federal University of Technology Owerri, Owerri, Nigeria.
- Nwanonenyi Simeon Chukwudozie Department of Polymer Engineering, Federal University of Technology Owerri, Owerri, Nigeria.
- Nwachukwu Joseph Ikechukwu Department of Environmental Management, Federal University of Technology Owerri, Owerri, Nigeria.
- Harcourt Basene Iyenebowa Nuclear Technology Centre, Nigeria Atomic Energy Commission, Sheda, Abuja, Nigeria.
- Anyanwu Chukwuma Egbule Nuclear Technology Centre, Nigeria Atomic Energy Commission, Sheda, Abuja, Nigeria.
- Ime James Nuclear Technology Centre, Nigeria Atomic Energy Commission, Sheda, Abuja, Nigeria.
- Ogunsola Ayobami Anthony Nuclear Technology Centre, Nigeria Atomic Energy Commission, Sheda, Abuja, Nigeria.
- Egwuogu Chioma Nuclear Technology Centre, Nigeria Atomic Energy Commission, Sheda, Abuja, Nigeria.
- Barnabas Henry Nuclear Technology Centre, Nigeria Atomic Energy Commission, Sheda, Abuja, Nigeria.
- Ukpe, Aniefiok Emem Department of Environmental Management, Federal University of Technology Owerri, Owerri, Nigeria.
DOI:
https://doi.org/10.18488/13.v15i1.4876Abstract
The study assessed the influence of gamma irradiation at different temperatures and concentrations on the anticorrosion properties of yam peel. A mild steel surface was exposed to 0.5M H2SO4 at room temperature for five days. The highest inhibitor efficiency, exhibited by gamma-irradiated yam peel powder at 24 hours, was 98.76% at a concentration of 1.2 g/L, while the lowest at 120 hours was 40.03% at 0.2 g/L of Inh 2. The results revealed that increasing the inhibitor concentration from 0.2 g/L to 1.2 g/L enhanced inhibition efficiency. The highest efficiency was observed at 40°C, reaching 81.87% at 1.2 g/L of Inh 2, whereas the lowest was at 70°C, with 54.19% at 0.2 g/L of Inh 1. Inh 2 is irradiated yam peel powder, while Inh 1 is unirradiated yam peel powder. The efficiency depended on temperature, concentration, and time, with gamma-irradiated yam peel powder showing near-excellent inhibition efficiency compared to unirradiated yam peel powder, based on weight loss results. Surface analysis indicated that protection offered by gamma-irradiated yam peel powder was due to the extension of adsorbed molecules on the mild steel surface. The relationship between temperature and inhibition efficiency supported physical adsorption, and adsorption studies followed a Langmuir isotherm.
