Current Volume 8
Abstract
This study presents a comprehensive comparison between the corrosion inhibition efficiencies of a conventional Industrial Corrosion Inhibitor (ICI) and an expired pharmaceutical drug, with an emphasis on its performance in multiple corrosive environments. Experimental tests were conducted in acidic medium, sour crude oil, and elevated temperature conditions to determine the effectiveness of this inhibitor under harsh operational settings. The expired drug selected for testing is Donepezil Hydrochloride, chosen for its molecular structures known to promote adsorption on metal surfaces, potentially reducing corrosion rates. In acidic medium at ambient temperature, both the ICI and the expired drug exhibited significant inhibition efficiencies, with ICI achieving over 95% efficiency and Donepezil Hydrochloride approaching 90%. However, under elevated temperature conditions, the ICI maintained a more consistent performance, showing a slight decline in efficiency, while the expired drug demonstrated a more pronounced drop, attributed to thermal degradation of some of the drug compounds. Tests conducted in sour crude environments highlighted the sulfur-resistant capabilities of the ICI, which achieved inhibition efficiencies of up to 92% in both ambient and elevated temperatures. Meanwhile, the expired drug, Donepezil Hydrochloride achieved around 85% efficiency in sour crude at ambient temperatures, but their efficiency decreased markedly in elevated temperatures due to increased molecular desorption rates. Overall, the study reveals that while ICIs provide superior and stable corrosion protection across a wider range of conditions, expired drug such as Donepezil Hydrochloride offer competitive inhibition efficiencies in ambient acidic environments. These findings underscore the potential of expired pharmaceuticals as eco-friendly, cost-effective alternatives to traditional corrosion inhibitors in milder corrosive conditions, though ICIs remain preferable for high-temperature and sour crude applications due to their enhanced durability and consistent performance under extreme conditions.
Keywords
Corrosion Inhibition, Industrial Corrosion Inhibitor (ICI), Donepezil Hydrochloride, Green Inhibitors, Corrosion Rate, Inhibition Efficiency
Citations
IRE Journals:
Ndubuisi, E. C , Anyoku, P. C , James, A. O.
"Investigative Study of Expired Drug as Corrosion Inhibitor for Production Operations" Iconic Research And Engineering Journals Volume 8 Issue 11 2025 Page 1463-1482
IEEE:
Ndubuisi, E. C , Anyoku, P. C , James, A. O.
"Investigative Study of Expired Drug as Corrosion Inhibitor for Production Operations" Iconic Research And Engineering Journals, 8(11)
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IRE Journals is an open access online journals established with an aim to publish high quality of research work in various diciplines. We have more than 6 years in publications. Over 2500+ papers already published.
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