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Synthesis and application of curcumin-based zinc complex for corrosion inhibition of mild steel in alkaline media


Affiliations
1 Post Graduate and Research Centre, Mahatma Gandhi College, Thiruvananthapuram 695 004, India
2 Department of Chemistry, All Saints’ College, University of Kerala, Thiruvananthapuram 695 007, India

A metal complex was prepared from zinc acetate dihydrate and curcumin by using the reflux method. The corrosion inhibition behaviour of the zinc–curcumin complex in 1 M NaOH on a mild steel sample was eva­luated by conventional weight loss method and potentiodynamic studies. Through SEM analysis, the shape of the layer adsorbed on the mild steel surface was studied. Through EDX analysis, the adsorbed film’s elemental composition was determined. The greatest result 98% was reached at 150 mg l–1, indicating that inhibition efficiency increases as the inhibitor’s concentration rises. The Langmuir’s adsorption isotherm is followed by adsorption nature of the complex over the sample surface.

Keywords

Adsorption, corrosion, curcumin, metal complex, weight loss method.
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  • Synthesis and application of curcumin-based zinc complex for corrosion inhibition of mild steel in alkaline media

Abstract Views: 108  | 

Authors

V. Nayana Senan
Post Graduate and Research Centre, Mahatma Gandhi College, Thiruvananthapuram 695 004, India
K. S. Beena Kumari
Department of Chemistry, All Saints’ College, University of Kerala, Thiruvananthapuram 695 007, India
O. Lekshmy
Post Graduate and Research Centre, Mahatma Gandhi College, Thiruvananthapuram 695 004, India

Abstract


A metal complex was prepared from zinc acetate dihydrate and curcumin by using the reflux method. The corrosion inhibition behaviour of the zinc–curcumin complex in 1 M NaOH on a mild steel sample was eva­luated by conventional weight loss method and potentiodynamic studies. Through SEM analysis, the shape of the layer adsorbed on the mild steel surface was studied. Through EDX analysis, the adsorbed film’s elemental composition was determined. The greatest result 98% was reached at 150 mg l–1, indicating that inhibition efficiency increases as the inhibitor’s concentration rises. The Langmuir’s adsorption isotherm is followed by adsorption nature of the complex over the sample surface.

Keywords


Adsorption, corrosion, curcumin, metal complex, weight loss method.



DOI: https://doi.org/10.18520/cs%2Fv127%2Fi11%2F1315-1321