Open Access(Calamansi) Citrofortunella Microcarpa Rind Extract As Plant Derived Green Corrosion Inhibitor For Mild Steel In 1.0M Hcl
Author(s) -
Gian Carlo E. Arguelles,
Mark Ceazar D. Torres,
Brian James U. Wu,
Jerry G. Olay,
Renato C. Ong
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/778/1/012007
Subject(s) - adsorption , electrochemistry , corrosion , langmuir adsorption model , cathodic protection , chemistry , electrolysis , nuclear chemistry , carbon steel , materials science , metallurgy , electrode , organic chemistry , electrolyte
The inhibitive action of extracts from Citrofortunella microcarpa (Calamansi) peels on mild steel in 1.0M HCl solution has been studied using the weight-loss method, electrochemical method, and SEM-EDX analysis. The measurements showed that calamansi peels have good inhibition properties. Weight loss results suggest that inhibitive efficiency increases as the concentration increases. It was also found that the adsorption stabilizes at 72 hours and degrades at longer immersion times. SEM studies of the immersed mild steel showed the decreasing extent of corrosion attack on mild steel at an increasing ratio of inhibitor, while EDX analysis shows the reduction of the formation of corrosion products, suggesting the formation of inhibitor film on the mild steel surface. The Calamansi peel extract inhibitor obeys the Langmuir adsorption isotherm model and the mode of adsorption was found to be physical and spontaneous. The results of the electrolysis technique have shown the favoring of inhibition in cathodic reactions.