Corrosion in Hank's solution and mechanical strength of ultrafine-grained pure iron

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dc.creatorBeatriz Araújo Batista
dc.creatorRenata Braga Soares
dc.creatorVanessa de Freitas Cunha Lins
dc.creatorRoberto Braga Figueiredo
dc.creatorAnton Hohenwarter
dc.creatorTulio Matencio
dc.date.accessioned2023-08-11T13:01:34Z
dc.date.accessioned2025-09-09T01:10:39Z
dc.date.available2023-08-11T13:01:34Z
dc.date.issued2020
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.identifier.doihttps://doi.org/10.1002/adem.202000183
dc.identifier.issn1527-2648
dc.identifier.urihttps://hdl.handle.net/1843/57726
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofAdvanced Engineering Materials
dc.rightsAcesso Restrito
dc.subjectEletroquímica
dc.subjectMateriais — Biodegradação
dc.subjectMetais — Propriedades mecânicas
dc.subjectFerro — Corrosão
dc.subjectSolução (Química)
dc.subject.otherBiodegradable
dc.subject.otherCorrosion
dc.subject.otherMechanical properties
dc.subject.otherPure iron
dc.subject.otherUltrafine grains
dc.titleCorrosion in Hank's solution and mechanical strength of ultrafine-grained pure iron
dc.typeArtigo de periódico
local.citation.issue7
local.citation.volume22
local.description.resumoIn recent years, there has been a growing interest in developing biodegradable implants which are absorbed by the body after fulfilling a task. Pure iron is a candidate for such applications because it is considered biocompatible and it does not passivate in physiological media. Herein, the potential to increase the strength of pure iron through grain refinement is evaluated to allow a reduction in size of implants and its effect on corrosion behavior. High-pressure torsion is applied to process pure iron and to refine the grain size of less than 1 μm. Annealing at different temperatures is used to produce samples with different grain sizes. Compression tests show a significant increase in flow stress to over 1 GPa in samples with very small grain sizes. However, such structure is associated with negligible strain hardening and strain-rate sensitivity. Electrochemical and immersion tests in Hank's solution show that the grain refinement reduces the corrosion rate significantly. Samples with grain sizes smaller than 1 μm display uniform corrosion and develop a homogeneous surface layer of corrosion products. Thus, severe plastic deformation followed by annealing produces mechanically stronger pure iron with reduced biodegradability.
local.identifier.orcidhttps://orcid.org/0000-0002-2490-0930
local.identifier.orcidhttps://orcid.org/0000-0002-6357-9553
local.identifier.orcidhttps://orcid.org/0000-0001-9827-9828
local.identifier.orcidhttps://orcid.org/0000-0002-5660-8125
local.publisher.countryBrasil
local.publisher.departmentENG - DEPARTAMENTO DE ENGENHARIA METALÚRGICA
local.publisher.departmentENG - DEPARTAMENTO DE ENGENHARIA QUÍMICA
local.publisher.departmentICX - DEPARTAMENTO DE QUÍMICA
local.publisher.initialsUFMG
local.url.externahttps://onlinelibrary.wiley.com/doi/10.1002/adem.202000183

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