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Electrochemical studies of the corrosion inhibition property of Rosmarinus officinalis on mild steel in dilute sulphuric acid

Loto, R. T. and Loto, Roy Olakunle and Joseph, O. O and Akinwumi, I. I. Electrochemical studies of the corrosion inhibition property of Rosmarinus officinalis on mild steel in dilute sulphuric acid. Journal of Chemical and Pharmaceutical Research, 7 (7). pp. 105-116. ISSN 0975-7384

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Abstract

The electrochemical behaviour and corrosion inhibition of mild steel in 0.5M and 1M dilute sulpuric acid by rosemary oil (Rosmarinus officinalis) at ambient temperature was investigated through potentiodynamic polarization test, weight loss techniques analysis and optical microscopy. Results obtained showed the organic compound to be highly effective with a maximum inhibition efficiency of 80.8 % and 87.9% from weight loss and 84.1% and 80.8% from polarization test in the acid test solutions. The adsorption characteristics of the compound obeyed the Langmuir adsorption isotherm while the inhibition mechanism was observed from thermodynamic calculations to be physiochemical. Optical microscopy micrographs confirms the overwhelming influence of the compound on the topography and surface morphology of the steel after exposure.

Item Type: Article
Uncontrolled Keywords: carbon steel; corrosion resistance; anodic protection; adsorption; organic inhibitor
Subjects: T Technology > T Technology (General)
T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User: Mrs Hannah Akinwumi
Date Deposited: 03 Nov 2016 12:43
Last Modified: 03 Nov 2016 12:43
URI: http://eprints.covenantuniversity.edu.ng/id/eprint/7385

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