Abstract
Abstract The corrosion behavior of X52 steel in synthetic seawater was investigated under varying hydrostatic pressures (0.10 MPa to 20.68 MPa) and temperatures (3.97 °C to 26.41 °C). This study utilized potentiodynamic polarization measurements, electrochemical impedance spectroscopy, and weight loss assessments to evaluate corrosion rates. Scanning electron microscopy and X-ray diffraction analysis were employed to examine the corroded morphologies and corrosion products. The electrochemical results indicated that both the corrosion current and double-layer capacitance decreased with increasing hydrostatic pressure and decreasing temperature. Consequently, lower corrosion rates were observed at higher pressures and lower temperatures. The corrosion products primarily consisted of hematite at all pressures and temperatures, except at 0.10 MPa and 6.89 MPa, where the predominant products were maghemite and goethite. Thus, this research demonstrates that the corrosion mechanisms remained almost similar regardless the pressure and temperature under study, since the corrosion products obtained were almost the same.