Adsorption and inhibitive performance of 3-methylquinoxaline-2(1H)-thione against mild steel corrosion in phosphoric acid solution
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Inhibitive performance of 3-methylquinoxaline-2 (1H) -thione denoted (MQ = S) on mild steel corrosion in 1.0 M H3PO4 was investigated using electrochemical measurements. It is revealed that this product acts as an excellent corrosion inhibitor for mild steel in 1.0 M H3PO4 where its inhibition reaches 93% at 5 × 10−4 M and increases with immersion time. Potentiodynamic polarization curves indicated that this compound acts as a mixed-type inhibitor. In addition, the MQ = S has its inhibition at high temperature. It was found that the adsorption of this compound obeyed the Langmuir adsorption isotherm.
KeywordsQuinoxaline derivative Corrosion inhibition Mild steel Phosphoric acid Electrochemical techniques
The authors appreciate the experimental support given by all members of ‘Laboratoire d’Ingénierie des Matériaux et d’Environnement: Modélisation et Application, Faculté des Sciences, Université Ibn Tofail’.
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Conflict of interest
All of the authors have declared no conflicts of interest.
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