Experimental and theoretical evidence for effective corrosion mitigation in mild steel using novel Garcinia gummi-gutta leaf extract
Anti-Corrosion Methods and Materials
ISSN: 0003-5599
Article publication date: 13 July 2022
Issue publication date: 4 August 2022
Abstract
Purpose
Surface pretreatment of iron and its alloys to remove stains and inorganic contaminants on the metal surface undergoes dissolution by virtue of the strong acidic media thereby increasing its susceptibility to corrosion. The purpose of this study is to explore the corrosion mitigation prospects of green corrosion inhibitors on mild steel surface.
Design/methodology/approach
Corrosion inhibition performance of Garcinia gummi-gutta leaf extract (GGLE) was explored against mild steel in 1 M HCl solution using the weight-loss method, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) techniques. Surface characterization was carried out to study the mechanism of inhibitor action.
Findings
The concentration of GGLE varied from 100 to 6,000 ppm and the result indicates that corrosion inhibition efficiency was amplified by raising the inhibitor concentration. The maximum inhibition efficiency was 82.2% at 6,000 ppm concentration. EIS results show the development of a protective layer of inhibitor molecule over the metal surface and PDP demonstrates that the inhibitor operates as a mixed-type inhibitor. Scanning electron microscopy and atomic force microscopy were executed to assess the surface morphology and roughness, respectively.
Originality/value
To the best of the authors’ knowledge, so far, no studies have been reported on the corrosion inhibition performance of GGLE which is rich in many bioactive components especially hydroxyl citric acid. This work encompasses the corrosion inhibition capability of GGLE against mild steel in an acidic medium.
Keywords
Acknowledgements
The authors are thankful to APJ Abdul Kalam Technological University, Kerala, India for the opportunity to do the research work as part of PhD program. We are grateful to NIIST, Thiruvananthapuram, Kerala, India for XPS analysis; Maharajas College, Ernakulam, Kerala, India for GC-MS.
Citation
G.K., S., John, S. and Jacob, J.M. (2022), "Experimental and theoretical evidence for effective corrosion mitigation in mild steel using novel
Publisher
:Emerald Publishing Limited
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