Conyza Dicorides: Anew and Efficient Eco-Friendly Corrosion Inhibitor for Mild Steel in 1M HCl Solution

Volume 16 , Issue 4 , November 2014 , Pages 149- 158

Authors

Narjes I. Khaled 1 ; Abd-Alwahab A. Sultan 2 ; Hussein H. Ibrahem 3 ; Moayad N. Khalaf 4

1 Technical College of Basrah, Petrochemical Department, Basrah-Iraq

2 Southern Technical University / Basrah-Iraq.

3 South oil company / Basrah-Iraq.

4 Chemistry Department, College of Science, University of Basrah, P O Box 773, Basrah-Iraq

DOI logo 10.17656/jzs.10354

Keywords

Abstract

The inhibitory effects of the ethanol extract of Conyza dioscoridis (EECD) on the corrosion of mild

steel in a 1 M HCl solution were investigated by weight loss measurements at the temperature range

of 25 °C to 65 °C. Results showed that the inhibition efficiency increased with increasing EECD

concentration and decreased with increasing temperature. The inhibition efficiency of 2 g/L EECD

reached approximately 94.87% at 25 °C. The thermodynamic functions of dissolution, activation

energy, and adsorption processes were calculated and discussed. The adsorption of the additive

followed the Langmuir adsorption isotherm.

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  • Published at13 November 2014

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