Title of article :
Mild Steel Corrosion Inhibition in Hydrochloric Acid Using Cocoa Pod Husk-Ficus exasperata: Extract Preparation Optimization and Characterization
Author/Authors :
Popoola, Lekan Taofeek Unit Operation and Material Science Laboratory - Chemical and Petroleum Engineering Department - Afe Babalola University, Ado-Ekiti, Ekiti State, NIGERIA , Aderibigbe, Tajudeen Adejare Unit Operation and Material Science Laboratory - Chemical and Petroleum Engineering Department - Afe Babalola University, Ado-Ekiti, Ekiti State, NIGERIA , Lala, Mayowa Unit Operation and Material Science Laboratory - Chemical and Petroleum Engineering Department - Afe Babalola University, Ado-Ekiti, Ekiti State, NIGERIA
Pages :
11
From page :
482
To page :
492
Abstract :
This research aimed at studying the optimization of cocoa pod-Ficus exasperate (CP-FE) extract preparation as mild steel anticorrosive agent in hydrochloric acid solution using a central composite design as an optimization tool. The maximum inhibition efficiency of 95.42% was obtained at ethanol volume, extraction time, CP-FE mixing ratio, and CP-FE mass of 500 mL, 48 h, 5, and 100 g respectively. The coefficient of determination value of 0.9674 between experimental and predicted values suggested that the model developed was exact. The optimum predicted point for CP-FE extract preparation by CCD was 62.02 mL, 9.51 h, 3.42, and 75.68 g for the ethanol volume, extraction time, CP-FE mixing ratio, and CP-FE mass respectively. SEM images revealed an acid attack on the mild steel surface. Adsorption of CP-FE extracts on mild steel surface prevents acid attack. FT-IR revealed the presence of carboxyl (-COOH) and hydroxyl (-OH) functional groups. EDS revealed high iron composition on mild steel surfaces in the presence of CP-FE extracts. Loss of Fe2+ into free HCl solution was observed from the AAS result. Conclusively, mixed cocoa pod-Ficus exasperate extracts exhibited effective corrosion inhibitory attributes for mild steel in HCl solution.
Farsi abstract :
فاقد چكيده فارسي
Keywords :
Optimization , Cocoa pod-Ficus exasperate , Hydrochloric acid , Mild steel , Extract
Journal title :
Iranian Journal of Chemistry and Chemical Engineering (IJCCE)
Serial Year :
2022
Record number :
2721540
Link To Document :
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