Biodegradation behaviour of Fe-based alloys in Hanks’Balanced Salt Solutions:Part *** characterisation and corrosion testing

作     者：Christabelle Tonna Cheng Wang Di Mei Sviatlana V.Lamaka Mikhail L.Zheludkevich Joseph Buhagiar 

作者机构：Department of Metallurgy and Materials EngineeringUniversity of MaltaMsidaMalta Institute of Surface ScienceHelmholtz-Zentrum HereonGeesthacht21502Germany School of Materials Science and Engineering&Henan Key Laboratory of Advanced Magnesium AlloyZhengzhou UniversityZhengzhou450001PR China Institute for Materials ScienceFaculty of EngineeringKiel UniversityKiel24103Germany 

出 版 物：《Bioactive Materials》 (生物活性材料（英文）)

年 卷 期：2022年第7卷第1期

页      面：426-440页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Christabelle Tonna and Joseph Buhagiar would like to thank the Malta Council for Science and Technology,for funding Project BioSA(R&I-2017-037-T)through the FUSION:R&I Technology Development Programme Cheng Wang thanks the China Scholarship Council for the award of fellowship and funding(No.201806310128) 

主　　题：Fe alloys Biodegradable metals Powder metallurgy Electrochemical impedance spectroscopy Local pH Local DO 

摘      要：Research on Fe-based biodegradable alloys for implant applications has increased considerably over the past ***,there is limited information on the influence of testing electrolytes on corrosion product formation and general corrosion *** this work,the effect of Hanks’Balanced Salt Solution(HBSS)with or without Ca^(2+)on the corrosion of Fe,Fe35Mn and(Fe35Mn)5Ag powder-processed coupons has been studied using potentiodynamic polarisation,Electrochemical Impedance Spectroscopy(EIS),and preliminary localised measurement of pH and dissolved oxygen concentration in close proximity to the metal *** Fe35Mn and(Fe35Mn)5Ag alloys showed accelerated corrosion when compared to pure Fe based on potentiodynamic testing results,with FeMnAg exhibiting the highest corrosion rate in Ca^(2+)-containing *** results indicate that in Ca^(2+)-containing HBSS,the formation of a partially protective Ca/P layer decelerates the corrosion progress,whereas the Fe-and Mn-phosphates formed in Ca^(2+)-free HBSS do not have the same *** Ca/P layer on(Fe35Mn)5Ag experienced a reduction in resistance following several hours of testing,indicating partial loss of its protective effect.