Effects of tensile stress on electrochemical characteristics and structural morphology of P110SS steels in carbon dioxide-saturated solution

Abstract A high-temperature autoclave was used to grow CO 2 corrosion-product films on P110SS steel specimens while the surface of continuously subjected tensile stress in a four-point bending jig; autoclaving times were 6, 18, 36, and 72 h. scanning electron microscope observe topography formed steels. An X-ray diffraction analyze phase compositions corrosion products. The electrochemical performance investigated using impedance spectroscopy potentiodynamic polarization curves. results showed that could hinder formation films; integrity compactness worsened, but did not change. applied resulted smaller grain size films, boundaries increased. In addition, owing induced stress, charge transfer resistances decreased, current densities increased for steels with 3.5 wt.% NaCl solution saturated .