Magnesium electrode potential
Magnesium has low electrode potential and active chemical properties, which makes magnesium alloy products easy to corrode. Therefore, the corrosion problem is also a key factor hindering the application of magnesium alloys. There are currently two main technical methods to improve the corrosion resistance of magnesium alloys. One is to increase the electrode potential of the magnesium alloy matrix itself through alloying and purification treatment, or to form a self-healing protective film on the surface to enhance its own environmental corrosion The other is through surface protection treatment to form a surface protective film to prevent the corrosion of the substrate. Because the former is limited by the chemical properties of magnesium itself, it has not achieved breakthrough progress in application, so at present, most of the research and development of surface protection technology at home and abroad have been devoted to the development of some new technologies based on the widely used micro-arc oxidation surface treatment technology. Surface treatment technology has achieved good results.
To vigorously develop the application of magnesium alloys, it is necessary to accelerate the basic research of magnesium alloys. Strengthen the basic theoretical research on the strengthening and toughening mechanism and plastic deformation mechanism of magnesium alloys, fundamentally understand the strengthening and plastic deformation mechanism of magnesium alloys, and at the same time strengthen the research on the corrosion mechanism and failure mechanism of magnesium alloys. On this basis, create stress and strain conditions that are conducive to the deformation of magnesium alloys, develop new high-performance magnesium alloy systems, and produce high-quality magnesium alloys with high strength, heat resistance, corrosion resistance, and good deformation properties through advanced deformed magnesium alloy processing technology. .