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

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

机构地区：[1]Department of Metallurgy and Materials Engineering,University of Malta,Msida,Malta [2]Institute of Surface Science,Helmholtz-Zentrum Hereon,Geesthacht,21502,Germany [3]School of Materials Science and Engineering&Henan Key Laboratory of Advanced Magnesium Alloy,Zhengzhou University,Zhengzhou,450001,PR China [4]Institute for Materials Science,Faculty of Engineering,Kiel University,Kiel,24103,Germany

出　　处：《Bioactive Materials》2022年第1期426-440,共15页生物活性材料（英文）

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).

摘　　要：Research on Fe-based biodegradable alloys for implant applications has increased considerably over the past decade.However,there is limited information on the influence of testing electrolytes on corrosion product formation and general corrosion progress.In 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 surface.Both 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 HBSS.The 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 effect.The Ca/P layer on(Fe35Mn)5Ag experienced a reduction in resistance following several hours of testing,indicating partial loss of its protective effect.

关 键 词：Fe alloys Biodegradable metals Powder metallurgy Electrochemical impedance spectroscopy Local pH Local DO 

分 类 号：TG1[金属学及工艺—金属学]