Exploring the galvanic corrosion behavior of 6061 aluminum alloy: TA1 titanium alloy based on finite element simulation

Abstract

Using polarization curve scanning, electrochemical impedance spectroscopy, macroscopic morphology observation, scanning electron microscope, X-ray diffraction (XRD), and energy dispersive spectroscopy (EDS), the corrosion regulars of connectors were investigated. A galvanic corrosion simulation model of aluminum-titanium rivets was established by electrochemical experimental parameters as boundary conditions. The results showed that the galvanic couple connection accelerated the corrosion significantly. XRD and EDS results show that the main corrosion products are Al₂O_3, Al(OH)₃. The corrosion potential of riveted parts decreased from the riveting point to both sides, ranging from −0.664 to −0.655 V. The corrosion current density decreases along both sides, and the corrosion current density at the most edge is 0.0113 A/m². The results of numerical simulation indicate that the model effectively predicted the galvanic corrosion behavior of aluminum-titanium rivets.