Preparation of corrosion-resistant surface of magnesium alloy and its performance study

Abstract

The susceptibility of magnesium alloys to corrosion has largely hindered the wide application of magnesium alloys. a natural green non-polluting method was proposed in this study to successfully prepare a corrosion-resistant film layer with MgO as the main substance on the magnesium alloy substrate by a two-step water steam method followed by annealing treatment. The morphology, composition, structure and corrosion resistance of the coating were investigated by SEM, FTIR, XRD and electrochemical methods. The electrochemical results showed that the coating prepared by this method has good corrosion resistance, reducing corrosion current by about four orders of magnitude compared with the bare Mg alloy substrate, and the corrosion potential and corrosion rate are also increased in different degrees.

Biocompatibility and Corrosion Resistance of Si/ZrO2 Bioceramic Coating on AZ91D Using Electron Beam Physical Vapor Deposition (EB-PVD) for Advanced Biomedical Applications

“…35-0821) and β-phases (Mg17Al12, JCPDS file no. 01-1128), the diffraction peaks of 2 theta (crystallographic Miller indices) appear at 32.2 (100), 34.4 (002), 36.6 (101), 47.8 (102), 63.1 (103), 68.6 (112), 72.5 (004) and 81.5 (104), respectively [34]. Zhu et al reported the diffraction peaks of Mg and Mg17Al12 and suggested that the surface of AZ91D magnesium alloy could be covered by magnesium hydroxide (Mg(OH)2, JCPDS file no.…”