In vitro corrosion and biocompatibility of phosphating modified WE43 magnesium alloy
(1. Center for Biomedical Materials and Tissue Engineering, Academy for Advanced Interdisciplinary Studies,
Peking University, Beijing 100871, China;
2. School of Information and Engineering, Wenzhou Medical College, Wenzhou 325035, China;
3.3. Department of Advanced Materials and Nanotechnology, College of Engineering,Peking University, Beijing 100871, China;
4. Dongguan EONTEC Co., Ltd., Dongguan 523000, China)
Peking University, Beijing 100871, China;
2. School of Information and Engineering, Wenzhou Medical College, Wenzhou 325035, China;
3.3. Department of Advanced Materials and Nanotechnology, College of Engineering,Peking University, Beijing 100871, China;
4. Dongguan EONTEC Co., Ltd., Dongguan 523000, China)
Abstract: Phospahting coated WE43 magnesium alloy was prepared by an immersion method. The microstructure, corrosion resistance and biocompatibility of the coated alloy were investigated. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to examine the microstructure and the composition of the coated alloy. The corrosion resistance was studied by means of potentiodynamic polarization method and the biocompatibility of the surface modified WE43 alloy was evaluated by (3-(4,5)-Dimethylthiazol-2, yl)-2,5-diphenyltetrazolium bromide (MTT) and hemolysis test. The results show that the phosphating coating can enhance the corrosion resistance of WE43 alloy and can be a good candidate to increase the biocompatibility of WE43 alloy.
Key words: magnesium alloy; phosphating coating; corrosion resistance; biocompatibility