Study of the effect of magnetic fields on static degradation of Fe and Fe-12Mn-1.2C in balanced salts modified Hanks’solution  

作　　者：Irene Lim′on Marta Multigner Carlo Paternoster Marcela Lieblich Bel′en Torres Diego Mantovani Joaquín Rams 

机构地区：[1]Dpto.de Matem′atica Aplicad1,Ciencia e Ingeniería de Materiales y Tecnología Electr′onic1,ESCET,Universidad Rey Juan Carlos,Tulip′an S/n,28933,M′ostoles,Madrid,Spain [2]Laboratory for Biomaterials and Bioengineering,Dept of Min-Met-Materials Engineering,Laval University&University Hospital Research Center,Quebec City,Canada [3]Centro Nacional de Investigaciones Metalúrgicas(CENIM-CSIC),28040,Madrid,Spain

出　　处：《Bioactive Materials》2024年第10期524-540,共17页生物活性材料（英文）

基　　金：Financial support of Ministry of Science and Innovation of Spain(MICINN)PID2021-123891OB-I00.PID2021-124341OB-C21 and PID2022-139323NB-I00 funded by MCIN/AEI/10.13039/501100011033;Rey Juan Carlos University,M′ostoles(Madrid)Spain has funded the C1PREDOC2020 grant of Irene Lim′on;supported by the Natural Science and Engineering Research Council of Canada,the Fonds de la Recherche du Qu′ebec sur les Natures et les Technologies,and the Canada Foundation for Innovation.

摘　　要：Iron and its alloys are attractive as biodegradable materials because of their low toxicity and suitable mechanical properties;however,they generally have a slow degradation rate.Given that corrosion is an electrochemical phenomenon where an exchange of electrons takes place,the application of magnetic fields from outside the body may accelerate the degradation of a ferrous temporary implant.In the present study,we have investigated the effect of alternating and direct low magnetic field(H=6.5 kA/m)on the corrosion process of pure iron(Fe)and an iron-manganese alloy(FeMnC)in modified Hanks’solution.A 14-day static immersion test was performed on the materials.The corrosion rate was assessed by mass and cross-sectional loss measurements,scanning electron microscopy,X-ray diffractometry,Fourier-transform infrared spectroscopy and X-ray photoelectron spectroscopy before and after degradation.The results show that the presence of magnetic fields significantly accelerates the degradation rate of both materials,with the corrosion rate being twice as high in the case of Fe and almost three times as high for FeMnC.In addition,a homogenous degradation layer is formed over the entire surface and the chemical composition of the degradation products is the same regardless of the presence of a magnetic field.

关 键 词：Biometals Biodegradable iron alloy Corrosion Magnetic fields Biodegradable implant MAGNETOHYDRODYNAMICS 

分 类 号：TG146[一般工业技术—材料科学与工程]