Abstract The present study investigates the electrochemical corrosion protection levels of two types of titanium alloys, A and B, in conjunction with CrMn steel under simulated atmospheric conditions through ultraviolet irradiation and immersion. The research focuses on different surface treatment techniques, including anodization and coating treatments. Macroscopic observation methods and scanning electron microscopy (SEM) were employed to assess the extent of corrosion on the sample surfaces. Laser confocal microscopy was utilized to analyze the corrosion pits resulting from galvanic corrosion, allowing for a quantification of the samples’ corrosion severity. Additionally, an impedance spectrum and polarization curves were obtained using a Versa 3F electrochemical workstation. X-ray diffraction (XRD) analysis was conducted to examine the phase composition of experimental materials post-galvanic corrosion. Furthermore, a universal testing machine was used to evaluate the mechanical properties of CrMn steel over various experimental cycles while characterizing how galvanic corrosion affects these mechanical properties. The results indicate that the sensitivity to galvanic corrosion among connected components follows this order: galvanized steel/B bare material > galvanized steel/A bare material > galvanized steel/anodized B ≈ galvanized steel/anodized A > galvanized steel/composite coating B ≈ galvanized steel/composite coating A.
Wang et al. (Fri,) studied this question.