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UAE Rhazya Stricta Decne extract as a corrosion inhibitor for mild steel in HCl solution

Ayssar Nahlé (Department of Chemistry, College of Sciences, University of Sharjah, Sharjah, UAE)
Ibrahim Almaidoor (Department of Chemistry, College of Sciences, University of Sharjah, Sharjah, UAE)
Ibrahim Abdel-Rahman (Department of Chemistry, College of Sciences, University of Sharjah, Sharjah, UAE)

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Article publication date: 27 May 2014

149

Abstract

Purpose

This study aims to study electrochemically and by weight-loss experiments the effect of UAE Rhazya Stricta Decne extract on the corrosion inhibition of mild steel in 1.0 M HCl solution, which will serve researchers in the field of corrosion.

Design/methodology/approach

Weight loss measurements were carried out on mild steel specimens in 1.0 M HCl and in 1.0 M HCl containing various concentrations (ranging from 2.0 to 0.002 g/L.) of the UAE Rhazya Stricta Decne extract at temperatures ranging from 303 to 343 K.

Findings

The aqueous Rhazya Stricta Decne leaves extract was found to be a highly efficient inhibitor for mild steel in 1.0 M HCl solution, reaching about 90 per cent at 2.0 g/L and 303 K, a concentration considered to be very moderate. Even with one-tenth of that concentration, 0.2 g/L, an inhibition of about 82 per cent was obtained at 303 K. The rate of corrosion of the mild steel in 1.0 M HCl is a function of the concentration of the Rhazya Stricta Decne extract. This rate increases as the concentration of the Rhazya Stricta Decne extract is increased. The percentage of inhibition in the presence of this inhibitor was decreased with temperature which indicates that physical adsorption was the predominant inhibition mechanism because the quantity of adsorbed inhibitor decreases with increasing temperature.

Practical implications

This inhibitor could have application in industries, where HCl solutions at elevated temperatures are used to remove scale and salts from steel surfaces, such as acid cleaning of tankage and pipeline, and may render dismantling unnecessary.

Originality/value

This paper is intended to be added to the family of green corrosion inhibitors which are highly efficient and can be used in the area of corrosion prevention and control.

Keywords

Citation

Nahlé, A., Almaidoor, I. and Abdel-Rahman, I. (2014), "UAE Rhazya Stricta Decne extract as a corrosion inhibitor for mild steel in HCl solution", Anti-Corrosion Methods and Materials, Vol. 61 No. 4, pp. 261-266. https://doi.org/10.1108/ACMM-04-2013-1252

Publisher

:

Emerald Group Publishing Limited

Copyright © 2014, Emerald Group Publishing Limited

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