Evaluation of Nicotiana Leaves Extract as Corrosion Inhibitor for Steel in Acidic and Neutral Chloride Solutions | Zendy

D.E. AbdElKhalek | Zendy; B.A. Abd-El-Nabey | Zendy; A.M. AbdelGaber | Zendy

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Evaluation of Nicotiana Leaves Extract as Corrosion Inhibitor for Steel in Acidic and Neutral Chloride Solutions

Author(s) -

D.E. AbdElKhalek,

B.A. Abd-El-Nabey,

A.M. AbdelGaber

Publication year - 2012

Publication title -

portugaliae electrochimica acta

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.252

H-Index - 27

eISSN - 1647-1571

pISSN - 0872-1904

DOI - 10.4152/pea.201204247

Subject(s) - chloride , corrosion , corrosion inhibitor , nicotiana , chemistry , nuclear chemistry , inorganic chemistry , biochemistry , organic chemistry , solanaceae , gene

The inhibition of steel corrosion in hydrochloric acid and sodium chloride solutions by Nicotiana leaves extract was investigated by potentiodynamic polarization and electrochemical impedance spectroscopy measurements. Polarization curves showed that the extract behaves as a mixed type inhibitor in acidic medium, while it acts as anodic type in neutral medium. Impedance measurements indicated that the size of the semicircles obtained increased with increasing the concentration of the extract and decreasing the chloride ion concentration. Nicotiana leaves extract was found to be more effective in controlling corrosion of steel in acidic solution than in neutral one. The activation parameters of the corrosion reaction of steel in acid media in absence and presence of nicotiana leaves extract were also calculated and discussed.

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