Duplex stainless steel, also known as austenitic-ferritic stainless steel, is a high-performance material with superior mechanical and corrosion qualities that is commonly found in marine applications. Corrosion and mechanical performance degradation are common in the marine industry due to the demanding operating conditions at varying temperatures. The mechanical characteristics, morphology, and electrochemical behavior of 2205 duplex stainless steel at elevated processing temperatures in different cooling mediums are discussed in this paper. Optical and scanning electron microscopy (SEM) along with potentiodynamic tafel plots in water containing 3.5% NaCl solutions were used to examine the precipitation of distinct phases without and with heat treatment, as well as their impact on corrosion resistance. When comparing the mechanical properties of duplex stainless steels, air quenching was shown to produce the highest impact strength and average hardness values. Because of the greater volumetric precipitation of austenite after water cooling, the water-cooled sample performed better in corrosion resistance tests.