Synergistic effect of Chitosan biguanidine hydrochloride salt as a green inhibitor for stainless steel alloy corrosion in a 0.5 M H2SO4 solution

The inhibition efficiency (IE) of the hydrochloride salt chitosan biguanidine (CBG-HCl, a green organic compound) on stainless steel alloy (SS) corrosion in 0.5 M H2SO4 solution was documented this work. Data reported for electrochemical impedance spectroscopy (EIS) and potentiodynamic analysis confirmed increasing resistance presence CBG-HCl with synergistic effect KI. Potentiodynamic experiments also indicate that blend CBG-HCl-KI works as mixed-type inhibitor corrosion. best information gathered agreed Langmuir isotherm model. corresponding normal Gibbs adsorption free energy implied processes are random involved two forms interactions, chemisorption physisorption. highest (88 %) work 400 ppm blended 800 In fact, long immersion time, remains effectively high, demonstrating its good stability medium.