Study of the corrosion behaviour of S32101 duplexand 410 martensitic stainless steel for applicationin oil refinery distillation systems

The corrosion behaviour of S32101 duplex and 410 martensitic stainless steel was studiedthrough weight loss and potentiodynamic polarization in 1–6 M HCl solutions. Results showthat S32101 steel has significantly lower corrosion rates than 410 steel from both tests atall concentrations with highest values of 0.04586 mm/y and 0.234 mm/y in comparison tomartensitic steel with corrosion rates of 0.827 mm/y and 19.84 mm/y at 6 M HCl concen-tration. Micrographs from SEM and EDS analyses showed a less corroded morphology forS32101 steel with fewer pits and slight depletion in the percentage composition of chromiumand other alloying elements