CORROSION INHIBITION EFFICACY OF HYBRID ORGANIC EXTRACTS FROM PROSOPISAFRICANA AND CITRULLUSLANATUS ON MILD STEEL IN ACIDIC MEDIUM
No Thumbnail Available
Date
2023
Journal Title
Journal ISSN
Volume Title
Publisher
THE ANNALS OF “DUNAREA DE JOS” UNIVERSITY OF GALATI
Abstract
Each of Prosopis Africana pod extract (PAPE) and Citrulluslanatus (WMPE)
performed quite well as green inhibitors in the electrochemical corrosion in acidic
solution at ambient temperature in previous research. However, the hybridization of
these compounds was varied with the concentration ratio in this study to optimize
the efficiency of the green inhibitor in a hydrochloric acid medium using mild steel.
The extraction process of the inhibitor samples was carried out with the Soxhlet
apparatus using n-hexane as the solvent. Furthermore, the potential inhibition
efficiency was monitored using various corrosion measurement techniques at room
temperature. The inhibitive response of the extracts could be attributed to the
adsorption of the extracts’ components on mild steel surface by physisorption
mechanism according to the Langmuir adsorption isotherm model. The results
revealed that inhibition efficiency (IE%) depends on the concentration of the
extracts. The peak IE% values were obtained with a hybrid ratio of 3:1 (PAPE:
WMPE) for gravimetric technique. The Tafel polarization and gasometrical
measurement technique is 96.7%, 98.5% and 83.1% respectively at the
concentration of 1.0 g/L, which are above the peak IE% for PAPE (93.7%, 80.96%
and 77.8%) and WMPE (92.7%, 80.5% and 75.6%).
Description
Keywords
Citrulluslanatus, Inhibiting Efficiency, Prosopis Africana, Green Inhibitor, Hybrid