Mg-Zn-Zr表面Ca-P涂层的制备及其降解性能研究  

Fabrication of Ca-P coating of Mg-Zn-Zr alloy and corrosion resistance

作　　者：姜舒婷[1] 曾晓爱 马玉春[1] 

机构地区：[1]天津理工大学材料科学与工程学院,天津300384

出　　处：《天津理工大学学报》2014年第6期7-10,32,共5页Journal of Tianjin University of Technology

基　　金：天津理工大学大学生创新性实验计划(X201210060016)

摘　　要：本研究采用微弧氧化与电化学沉积相结合的方法在镁合金(Mg-Zn-Zr)表面制备Ca-P生物陶瓷涂层.利用XRD、SEM、划痕仪、显微镜以及电化学工作站等测试手段来表征所得到的生物陶瓷的成分组成、表面形貌、涂层与机体的结合力、涂层厚度以及涂层材料的耐腐蚀性能.结果表明:在沉积溶液相同的情况下,沉积时间都为30 min,直流电沉积电流大小制备的Ca-P生物陶瓷涂层成分近似相同,主要成分为Ca HPO4·2H2O和Ca HPO4;在沉积电流为20 m A时,直流电沉积制备的Ca-P陶瓷涂层的腐蚀电位达到最大值-1.49 V,腐蚀电流密度达到最小值0.24×10-6A·cm-2,其耐蚀性能也最强.Mg-Zn-Zr alloy was surface-treated to fabricate Ca-P biological ceramic coating by micro-arc oxidation and electro- chemical deposition method.The phase composition, surface morphology, adhesion of body with coating, coating thickness and corrosion resistence were characterized by XRD, SEM , scratch tester, microscope and electrochemical workstation.The results show that the Ca-P biological ceramic coating composition is the approximately same whose main component are CaHPO4 · 2 H2O and CaHP04 under the condition of same deposition solution, deposition time for 30 min.In the deposion current of 20 mA , the corrosion potential of Ca-P biological ceramic coating reaches the maximum of -1.49 V, the corrosion current density reaches the minimum of 0.24× 10^-6 A. cm-2 , which is the most strong corrosion resistance.

关 键 词：Mg-Zn-Zr Ca-P涂层 耐蚀性能 

分 类 号：TG178[金属学及工艺—金属表面处理]