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Document Type : Original Research Article

Authors

1 Department of Chemistry, Faculty of Science, Mansoura University, Mansoura, 35516, Egypt

2 Water and waste water company, Dakahlia, Egypt

3 Department of Agricultural Chemistry, Faculty of Agriculture, Mansoura University, Egypt

4 Lab manager in Talkha sanitation plant, water and wastewater company, Dakahlia, Egypt

10.33945/SAMI/PCBR.2019.2.5

Abstract

The extract of cinnamomum have been evaluated as green inhibitor for the corrosion of Carbon steel in 1M HCl solution was investigated using weight loss, potentiodynamic polarization, ac electrochemical impedance spectroscopy (EIS) , electrochemical frequency modulation (FEM) and energy dispersion spectroscopy (EDS) and scanning electron microscopy (SEM) methods of monitoring corrosion . The inhibitive property of the extract is attributed to the presence of cinnamic aldehyde as major constituent in the extract. measurements showed that this extract act as mixed-type inhibitor. The inhibition efficiency was found to increase with inhibitor concentration. Results obtained by various techniques are close to each other and maximum efficiency of 81.1 % is acknowledged at the inhibitor concentration of 600 ppm. Langmuir isotherm model is found most suitable to explain adsorption behavior of inhibitor for C-steel surface. Molecular adsorption of inhibitor over C- steel surface is found responsible for corrosion inhibition of C-steel in acid.

Graphical Abstract

Cinnamomum zeylanicum Extract as Green Corrosion Inhibitor for Carbon Steel in Hydrochloric Acid Solutions

Keywords

Main Subjects

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