Defect and Diffusion Forum Vol. 416

Abstract: Rutin flavonoid compounds have been isolated from cassava leaves and tested for their corrosion resistance against mild steel. Inhibition efficiency and adsorption properties were studied using the weight loss method at temperature variations of 303K, 313K, 323K and 333K and concentration variations of 0.1; 0.5; 1.0; 5.0; and 10 g/L. Potentiodynamic polarization was used to determine the inhibitor type of Cassava Leaf Routine (RCL). The results showed that RCL can reduce the corrosion rate and increase the corrosion inhibition efficiency of mild steel. The thermodynamic parameters have been calculated and the result is that the adsorption corrosion mechanism by physisorption takes place spontaneously with increasing temperature. Based on potentiodynamic polarization, the efficiency of corrosion inhibition by RCL with a concentration of 10 g//L on mild steel was 81.58%. RCL as a mixed corrosion inhibitor.