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Corrosion behavior of sintered oxide dispersion strengthened duplex stainless steel composites in pineapple juice
extract was investigated using weight loss and potentio-dynamic methods. The scope of the work includes
investigations on the effects of alloying elements, grain growth inhibitors, varying reinforceing ceramics starting
powders. The sinter oxide dispersion strengthened (ODS) samples were characterized, using a combination of
varying analytical techniques; scanning electron microscopy (SEM) and x-ray diffractometer (XRD). Gravimetric
method is based on weight loss measurement while potentio-dynamic polarization scanning was done using an
autolab potentiostat (PGSTAT 204 computer controlled) using the general purpose electrochemical software
(GPES) version 1.10. Potentio-dynamic polarization curves were collected by scanning the potential from -1.0 to
+1.5 V against Ag/AgCl at a scan rate of 2.0 mV/s. All electrochemical measurements were performed at room
temperature in naturally aerated solutions. It was also observed that corrosion rate by gravimetric and polarization
scanning provides relatively the same trend of information. Corrosion pits originated from the residual pores and
grow as a result of weakening effect by the environment. Inclusions of partially Stabilized Zirconia (PSZ) help
prevent further growth of the pits.