Volume 48, Issue 7 e70053
Research Article

Copper Corrosion in Blended Diesel-Biodiesel: Corrosion Rate Evaluation and Characterization

Lekan Taofeek Popoola

Corresponding Author

Lekan Taofeek Popoola

Department of Chemical and Petroleum Engineering, Afe Babalola University, Ado-Ekiti, Ekiti State, Nigeria

E-mail: [email protected]; [email protected]

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Celestine Chidi Nwogbu

Celestine Chidi Nwogbu

Metallurgical and Materials Engineering Department, Enugu State University of Science and Technology, Enugu, Enugu, Nigeria

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Usman Taura

Usman Taura

Oil and Gas Research Centre, Sultan Qaboos University, Salalah, Oman

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Yuli Panca Asmara

Yuli Panca Asmara

Department of Mechanical Engineering, INTI International University, FEQS, Nilai 71800, Nilai, Negeri Sembilan, Malaysia

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Alfred Ogbodo Agbo

Alfred Ogbodo Agbo

Metallurgical and Materials Engineering Department, Enugu State University of Science and Technology, Enugu, Enugu, Nigeria

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Paul C. Okonkwo

Paul C. Okonkwo

Mechanical and Mechatronics Engineering Department, College of Engineering, Dhofar University, Salalah, Oman

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First published: 12 June 2025

Abstract

The need for affordable and clean energy calls for biodiesel production from renewable sources. Thus, corrosion rate (CR) examination of diesel engine components in biodiesel is vital. This study examined the corrosion behavior of copper coupon (CC) in diesel fuel blended with biodiesel synthesized from waste cooking oil. Characterization and CR evaluation were executed at immersion time, temperature, blending ratio, and agitation of 30–60 days, 30–50 °C, 10–30 (v/v) %, and 110–130 rpm, respectively. Physicochemical properties of blended biodiesel changed after CC corrosion. Minimum CR of 0.002537 mm y−1 was recorded at 30 days, 30 °C, 20 (v/v) %, and 110 rpm, respectively. The developed Taguchi model was excellent. R2, RMSE, MAE, SEP, and AAD were 0.9992, 0.0004156, 0.0003022, 0.01695, and 0.6855, respectively. Pits formation, the presence of Cu, C, and O on CC surface, and 10.83 ppm Cu ions in blended sample were noticed at highest CR.

Data Availability Statement

Data will be made available upon request.

The authors declare no conflicts of interest.

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