Corrosion Behaviour of Novel AZ91-Ti Magnesium Titanium Matrix Composites in Dilute Harrison Solution

Abstract

A novel magnesium magnesium alloy was prepared by adding titanium and barium carbide under argon environment. The mechanical properties of the prepared alloy were investigated with respect to the AZ91D alloy. The microstructure of the composites was investigated using Scanning Electron Microscope SEM/EDS and X-ray diffraction (XRD). The corrosion behaviour of magnesium matrix composites reinforced with a Titanium and boron network of particulates fabricated using a low cost in-situ reactive infiltration technique. The corrosion behaviour was examined using both AC and DC techniques; electrochemical impedance spectroscope (EIS) and potentiodynamic polarization in dilute Harrison solutions. The tafel extrapolation results showed that the corrosion rate reduce by an order of magnitude. Moreover; EIS results shows that addition of Ti and Barium carbide improve the corrosion behaviour of AZ91 alloy and no sign of corrosion was appeared during 10 days of immersion in corrosive environments.