Last modified: 2018-08-01
Abstract
Evaluation of the corrosion inhibiting efficacy of two thiazolines derivatives against XC38 steel corrosion in acidic medium
A. Attou1, O. Benali2 , H. B. Ouici1
1 Department of Chemistry, Faculty of Science, Taher Moulay University, Saida, Algeria 2 Department of Biology, Faculty of Science, University of Taher Moulay, Saida, Algeria
*Corresponding author: ATTOU Asmaa
E-mail: attouasma@gmail.com
ABSTRACT
In the oil and gas industry, steel is largely utilized for diverse applications such as fluid transportation line, storage tank, drilling pipe, etc. In many cases, industrial practices like mill scale removal, acid cleaning and oil well acidizing, bring metals in contact with corrosive solutions. It is therefore a common practice to add corrosion inhibitors into corrosive solutions before metal pre-treatment[1]. The compounds containing hetero atoms and particularly those containing both the nitrogen and the sulfur are of remarkable signicance as they often provide excellent inhibition [2-4]. The corrosion inhibiting property of these compounds is specied in their molecular structure. The planarity and lone pair of electrons present on heteroatoms are the signicant characteristics that ascertain the adsorption of these molecules on the metal surface [5-9].
In this work, we are interested in studying the inhibition efficicency of two thiazolines: 2-amino-5-mercapto-1,3,4-thiadiazole (AMT) and 2,5-dimercapto-1,3,4-thiadiazole (DMT) of XC38 steel in 0.5M sulfuric acid at 303 K was studied practicing weight loss. The obtained results showed that these two compounds were an eective inhibitor. The inhibition eciency, η(%), increased with the increase in concentration inhibitor. Isotherm adsorption was evaluated to explain the mechanism of inhibition and inhibitor metal reactions. The effect of temperature for both compounds studied and discussed.
Keywords: acid, XC38 steel, inhibition, corrosion, AMT, DMT..
References
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