Synthesis of calixarene derivatives and their anticorrosive effect on steel in 1M HCl

Abstract

Purpose To evaluate the effect of synthesised calixarenes as new inhibitors on the corrosion of steel in HCl media at various temperatures. Design/methodology/approach Calixarenes have been synthesised and tested as corrosion inhibitors. Gravimetric technique and potentiodynamic polarisation and impedance spectroscopy methods were used. Findings Calixarenes exhibited a good inhibition. Their efficiency decreases slightly with temperature. Research limitations/implications It was found that the inhibition efficiency increases with the concentration of inhibitors to reach 92 per cent at 10 −4 M. Practical implications The efficiency of calixarene derivatives increases with the concentration and falls slowly with temperature to attain 84 per cent at 353 K range. Calixarenes can be used in chemical cleaning and pickling processes. Originality/value The originality of this work is to find an inhibitor to give protection close to 100 per cent.