Question

Question 3 (30 zinc in a hydrochloric acid solution with a pH 5 and a Zn2 concentration of 10-5 M. The cathodic (Be 0.12) V/decade and anodic Tafel slope (Po 0.15) V/decade, respectively. Corrosion potential and the corrosion current are Ecor 0.54V and Icor 1.65x10-*A/cm2, respectively. (a) Calculate the exchange current densities for the cathodic and anodic reactions are 1H2 -? and izn ?. Assume that charge-transfer kinetics controls the reaction rate and that the high-field approximation applies. (b) Evaluate the protection current required for the system. points): Construct the Evans diagram for the corrosion of

Answer 1