Tailoring the degradation rate of magnesium through biomedical nano-porous titanate coatings

作     者：Matthew D.Wadge Jamie McGuire Benjamin V.T.Hanby Reda M.Felfel Ifty Ahmed David M.Grant Matthew D.Wadge;Jamie McGuire;Benjamin V.T.Hanby;Reda M.Felfel;Ifty Ahmed;David M.Grant

作者机构：Advanced Materials Research GroupFaculty of EngineeringUniversity of NottinghamNG72RD United Kingdom Physics DepartmentFaculty of ScienceMansoura UniversityMansoura 35516Egyp 

出 版 物：《Journal of Magnesium and Alloys》 (镁合金学报（英文）)

年 卷 期：2021年第9卷第1期

页      面：336-350页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：This work was supported by the Engineering and Physi-cal Sciences Research Council[grant numbers EP/K029592/1 EP/L022494/1] 

主　　题：Magnesium degradation Titanate Biodegradable Ion exchange Electrochemical corrosion Magnetron sputtering 

摘      要：A novel approach was developed to reduce the corrosion rate of magnesium(Mg)metal,utilising titanate *** sputtering was used to deposit ca.500 nm titanium(Ti)coatings onto pure Mg discs,followed by hydrothermal conversion and ion exchange reactions to produce sodium and calcium titanate *** confirmed the characteristic nanoporous structure of sodium and calcium titanate,with thicknesses ranging from ca.0.8 to 1.4μ*** analysis confirmed the presence of Ti^(4+)-O,Na-O,and Ca-O bonding,whilst Raman spectroscopy demonstrated characteristic vibrational modes(such as TiO 6 octahedral vibrations)of the sodium and calcium titanate perovskite ***,corrosion studies through potentiodynamic polarisation measurements demonstrated the NB/NH CaTC samples to be superior in reducing Mg degradation,compared to other samples tested,through an increase in E_(corr)from-1.49 to-1.33 V,and the reduction in corrosion current density,i corr,from 0.31 to 0.06 mA/cm^(2)for Mg and NB/NH CaTC samples,*** was a clear trend noted for the NB/NH samples,which showed an increase in E corr to more positive values in the following order:MgTi coatedNaTC*** nanoporous titanate coatings have potential to be applied onto degradable plates for bone fracture fixation,or other orthopaedic applications.