Abstract: The electrochemical behavior of duplex stainless steel has been evaluated in sulfuric acid solutions by weight loss method, potential-time and potentiodynamic polarization techniques. The results showed that increasing sulfuric acid concentration and temperature lead to increasing the corrosion rate and decreasing the passivity region. On the other hand, the thermodynamics parameters ΔH, ΔS and E have been determined.
 

Keywords: Duplex stainless steel; Passivity; Corrosion; Potentiodynamic polarization