On the Corrosion behavior of 4A and 5A cast duplex stainless steel under different heat treatment conditions

Abstract In this analysis, corrosion efficiency and mechanical properties of duplex stainless steel castings (DSS-4A DSS-5A) were compared to their wrought counterparts. Cast DSS-4A DSS-5A are characterized in two separate solution treated settings, while counterparts both solutions forged form. Optical microscopy X-ray diffractometry employed perform the metallurgical characterization. Electrochemical techniques such as Tafel extrapolation electrochemical impedance spectroscopy used investigate activity. An workstation was studies. To compare stability changes grades, an ASTM standard B117 salt spray test performed a 3.5 percent NaCl medium. Without any intermetallic phases, XRD showed austenite ferrite phases. The elements partitioned further into phases that they promoted, according elemental study ultimate tensile strength hardness values higher than those DSS-4A. had resistance When comparing media (H2SO4 NaCl), demonstrated superior resistance.