Design of multilayer hybrid sol-gel coatings with bifunctional barrier-bioactive response on the Elektron 21 magnesium alloy for biomedical applications

作     者：K.S.Durán N.Hernández L.M.Rueda C.A.Hernández-Barrios A.E.Coy F.Viejo K.S.Durán;N.Hernández;L.M.Rueda;C.A.Hernández-Barrios;A.E.Coy;F.Viejo

作者机构：Grupo de Investigación en Desarrollo y Tecnología de Nuevos Materiales(GIMAT)Universidad Industrial de Santander9 Cra.27Colombia Grupo de Investigación de las Ciencias de las Ingenierías(GICI)Universidad de San BuenaventuraCartagenaCalle Real de TerneraDiagonal 32#30-966Colombia 

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

年 卷 期：2021年第9卷第6期

页      面：2097-2112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：the Vicerrectorìa de Investigación y Extension of the Universidad Industrial de Santander Colombia(grant number 2508)for the financial support of the present work 

主　　题：Magnesium bioactivity coating sol-gel EIS corrosion 

摘      要：The present study aims to develop multilayer barrier-bioactive hybrid sol-gel coatings from a mixture of the silane precursors tetraethylorthosilicate(TEOS)and glycidoxypropyltriethoxysilane(GPTMS)deposited on the Elektron 21 magnesium *** purpose of the inner layer(barrier coating)was to provide corrosion protection to the magnesium alloy,whereas the outer layer(bioactive coating)was doped with different Ca and Mg contents to produce a bioactive *** coatings were characterised using scanning electron microscopy(SEM)and their corrosion behaviour was evaluated by anodic polarisation and electrochemical impedance spectroscopy after immersion in simulated body fluid(SBF)at 37±0.5°*** experimental results showed that the multilayer coatings increased the corrosion resistance of the alloy up to three orders of magnitude during immersion in SBF *** the other hand,the presence of Ca and Mg in the bioactive coating promoted the growth of apatite-like ***,an increment of salt content favoured the formation of porous coatings,which allowed the access of the electrolyte to the substrate leading to their rapid *** the latter,this research endorses the premise that the TEOS-GPTMS hybrid system represents a promising alternative to produce bifunctional barrier-bioactive coatings.