Abstract
The corrosion in thermal desalination units during the acidic cleaning could have negatives impacts on the economic and environmental results. Here we address these negatives impacts using sulfonium-based ionic liquid (i.e. Triethylsulfonium bis(trifluoromethylsulfonyl)imide, abbrev. TESFI). Chemical, electrochemical methods and quantum chemical calculations were used to test the efficiency of TESFI. Results obtained show the TESFI compound was effective with optimal corrosion inhibition values of 97.8% at 120 ppm. Moreover, we noted that the efficiency of TESFI decreased from 97.8% to 88.2% with elevating the temperature from 303 K to 343 K. Our results suggest that the adsorption of TESFI molecules onto the 304 SS surface plays the main step in the corrosion inhibition mechanism. Quantum chemical parameters provided a comprehensive picture of the adsorption of TESFI molecules.
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