The effect of temperature on the inhibition of acid hydrochloric corrosion of carbon steel by hexa propylene glycol cyclotriphosphazene

Mouhsine Galai, Mustapha El Go

Abstract

Inhibition effect of Hexa propylene glycol cyclotri phosphazene (HPGCP) was studied on carbon steel cor rosion in 1 M HCl has been investigated in a temperature rangin g from 298 to 328 K using weight loss measurements and electrochemical polarisation. The inhibition effici ency of HPGCP decreases with the rise of temperatur e. The values of adsorption enthalpy a H ∆ and adsorption entropy a S ∆ were discussed. The thermodynamic parameters of adsorption reveal that there is a strong interactio n between inhibitor and carbon steel. The highest i nhibition efficiency was observed 10 -5 M of HPGCP concentration at different temperature