Anti-corrosive properties of an aqueous extract of Chrysanthemum indicum flower

• K. Kavitha^1,2, H. Benita sherine² and S. Rajendran³

¹ PG and Research Department of Chemistry, National College (Autonomous), Tiruchirappalli-620001, Tamil Nadu, India
² PG and Research Department of Chemistry, Periyar E.V.R. College (Autonomous), Tiruchirappalli-620023, Tamil Nadu, India
³ Department of Chemistry, Corrosion Research Centre, St. Antony’s College of Arts and Sciences for Women, Dindigul-624005, Tamil Nadu, India

Abstract: The anti-corrosive properties of an aqueous extract of Chrysanthemum indicum flower (CIF) in controlling the corrosion of mild steel (MS) in simulated oil well water (SOWW) medium has been evaluated by the weight loss method and by electrochemical measurements. The various functional groups of the CIF was confirmed by Fourier transform infrared spectroscopy (FTIR) analysis. Weight loss method reveals that 10 mL of an aqueous extract (12% solution) of CIF offers a maximum corrosion inhibition efficiency of 93%. Electrochemical methods such as potentiodynamic polarization study and electrochemical impedance spectroscopy were used to study the mechanistic aspects of corrosion inhibition. The Hardness of a metal before and after immersion has been determined. The surface morphology was examined by scanning electron microscopy (SEM) and atomic force microscopy (AFM). The results show that the aqueous extract of CIF acts as a corrosion inhibitor.

Keywords: Chrysanthemum indicum flower, corrosion inhibitor, mild steel, simulated oil well water, Vicker hardness, surface morphology

Int. J. Corros. Scale Inhib., 2021, 10, no. 2, 783-800
doi: 10.17675/2305-6894-2021-10-2-19

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