Graphite-Enhanced TiO2 Nanoparticles Protect Duplex Stainless Steel against Acidic Corrosion

In this work, TiO2 nanoparticles with graphite are used to coat duplex stainless steel (DSS) using the negative electrodeposition technique to protect it from corrosion. The anticorrosion performance of nanoparticle coatings that comprised a proper quantity of graphite particles was investigated using an open circuit potential and a potentiodynamic technique in a 1 M H2SO4 solution saturated with carbon dioxide. The corrosion rate of the DSS sample was lower when it was coated with TiO2/graphite than when it was uncoated, and the potential for corrosion increased from - 0.450 V for the uncoated DSS surface to - 0.410 V for the saturated calomel when it was coated with TiO2/graphite. Electrochemical studies discovered that TiO2/graphite coated DSS corrosion in sulfuric acid media had excellent protective qualities, with an effectiveness of 77.74 % when the current density was 0.957 milliamps per centimeter squared. It has been established by the findings of this study that duplex stainless steel can be protected against corrosion in acidic conditions by the application of protective coating layers. The surface morphology of TiO2/graphite coating has demonstrated that it may withstand an acid attack due to its high adherence to the surface sample. X-ray diffraction was used to improve the accuracy of measurements for determining and researching the composition of the alloy surface’s protective layer.