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Anti-Corrosion performance of a new silane coating for corrosion protection of AZ31 Magnesium alloy in Hank’s solution

2012-07Journal article Restricted access
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dc.contributor.authorZomorodian, A.
dc.contributor.authorBrusciotti, F.
dc.contributor.authorFernandes, A.
dc.contributor.authorCarmezim, M. J.
dc.contributor.authorSilva, Maria Teresa Oliveira de Moura e
dc.contributor.authorFernandes, J. C. S.
dc.contributor.authorMontemor, M. F.
dc.date.accessioned2015-09-07T09:21:19Z
dc.date.available2015-09-07T09:21:19Z
dc.date.issued2012-07
dc.description.abstractMg alloys can be used as bioresorsable metallic implants. However, the high corrosion rate of magnesium alloys has limited their biomedical applications. Although Mg ions are essential to the human body, an excess may cause undesirable health effects. Therefore, surface treatments are required to enhance the corrosion resistance of magnesium parts, decreasing its rate to biocompatible levels and allowing its safe application as bioresorbable metallic implants. The application of biocompatible silane coatings is envisaged as a suitable strategy for retarding the corrosion process of magnesium alloys. In the current work, a new glycidoxypropyltrimethoxysilane (GPTMS) based coating was tested on AZ31 magnesium substrates subjected to different surface conditioning procedures before coating deposition. The surface conditioning included a short etching with hydrofluoric acid (HF) or a dc polarisation in alkaline electrolyte. The silane coated samples were immersed in Hank's solution and the protective performance of the coating was studied through electrochemical impedance spectroscopy (EIS). The EIS data was treated by new equivalent circuit models and the results revealed that the surface conditioning process plays a key role in the effectiveness of the silane coating. The HF treated samples led to the highest impedance values and delayed the coating degradation, compared to the mechanically polished samples or to those submitted to dc polarisation.por
dc.identifier.citationZOMORODIAN, A.; [et al] – Anti-Corrosion performance of a new silane coating for corrosion protection of AZ31 Magnesium alloy in Hank’s solution. Surface & Coatings Technology. ISSN: 0257-8972. Vol. 206, nr. 21 (2012), pp. 4368-4375por
dc.identifier.doi10.1016/j.surfcoat.2012.04.061
dc.identifier.issn0257-8972
dc.identifier.urihttp://hdl.handle.net/10400.21/5064
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevier Sciencepor
dc.relationERA MNT/0001/2009
dc.subjectAZ31 Mg Alloypor
dc.subjectGPTMS Coatingpor
dc.subjectHank's Solutionpor
dc.subjectElectrochemical Impedance Spectroscopypor
dc.subjectBioresorsable Materialspor
dc.titleAnti-Corrosion performance of a new silane coating for corrosion protection of AZ31 Magnesium alloy in Hank’s solutionpor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage4375por
oaire.citation.startPage4368por
oaire.citation.titleSurface & Coatings Technologypor
oaire.citation.volume206por
rcaap.rightsclosedAccesspor
rcaap.typearticlepor

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