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Surface Adsorption and Corrosion Resistance Performance of Acacia concinna Pod Extract: An Efficient Inhibitor for Mild Steel in Acidic Environment

  • Rajesh Haldhar
  • Dwarika PrasadEmail author
  • Nishant Bhardwaj
Research Article - Chemistry
  • 21 Downloads

Abstract

The object of this study is to experimentally evaluate the inhibition properties of Acacia concinna (A. concinna) extract in a 0.5 M sulphuric acid media for mild steel. The protective film-formation study was done using UV–Vis spectroscopy. Surface film composition and morphology were examined by scanning electron microscope and atomic force microscope. Electrochemical impedance spectroscopy (EIS) and potentiodynamic spectroscopy (PDS) were carried out to explain the combined (cathodic and anodic) nature and cathodic dominance of A. concinna. Results of electrochemical analyses showed that 250 mg/L inhibitor concentration had the highest performance and efficiency (proved to be 94% by EIS and 92% by PDS results). The formed film in this sample showed the highest hydrophobicity and literally no obvious forms of corrosion. The theoretical results showed the comparative adsorption of phytochemicals on the steel. All acquired outcomes confirmed that A. concinna extract can develop an efficient protective layer and resist the corrosion procedure.

Keywords

EIS PDS Green corrosion inhibitor SEM AFM Acacia concinna 

Notes

Acknowledgement

The authors are grateful to Dr. Gurmeet Singh, Ex-HOD of Department of Chemistry at University of Delhi, Delhi, India, for offering the laboratory resource for impedance workstation.

Compliance with Ethical Standards

Conflicts of interest

The authors declare that there are no conflicts of interests.

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Copyright information

© King Fahd University of Petroleum & Minerals 2019

Authors and Affiliations

  1. 1.Department of ChemistryShri Guru Ram Rai UniversityDehradunIndia

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