Corrosion protection of AZ91D magnesium alloy by a duplex coating
A duplex coating was formed under potentiostatic conditions on magnesium alloy AZ91D in order to improve its corrosion resistance in a simulated physiological environment. The first layer was formed by anodization at low potentials in molybdate solution. The outer layer was a PPy film electrosynthes...
Main Authors: | , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Serbian Chemical Society
2020-01-01
|
Series: | Journal of the Serbian Chemical Society |
Subjects: | |
Online Access: | http://www.doiserbia.nb.rs/img/doi/0352-5139/2020/0352-51392000027F.pdf |
id |
doaj-48439cec98a54b43aea663b7f574ab5d |
---|---|
record_format |
Article |
spelling |
doaj-48439cec98a54b43aea663b7f574ab5d2021-02-05T08:14:47ZengSerbian Chemical Society Journal of the Serbian Chemical Society0352-51391820-74212020-01-0185101317132810.2298/JSC200221027F0352-51392000027FCorrosion protection of AZ91D magnesium alloy by a duplex coatingForero López Ana D.0Loperena Ana P.1Lehr Ivana L.2Brugnoni Lorena I.3Saidman Silvana B.4Chemical Engineering Department, Institute of Electrochemical and Corrosion Engineering, National University of the South, CONICET, Bahía Blanca, ArgentinaChemical Engineering Department, Institute of Electrochemical and Corrosion Engineering, National University of the South, CONICET, Bahía Blanca, ArgentinaChemical Engineering Department, Institute of Electrochemical and Corrosion Engineering, National University of the South, CONICET, Bahía Blanca, ArgentinaDepartment of Biology, Biochemistry and Pharmacy, Institute of Biological and Biomedical Sciences of the South, National University of the South, CONICET, Bahía Blanca, ArgentinaChemical Engineering Department, Institute of Electrochemical and Corrosion Engineering, National University of the South, CONICET, Bahía Blanca, ArgentinaA duplex coating was formed under potentiostatic conditions on magnesium alloy AZ91D in order to improve its corrosion resistance in a simulated physiological environment. The first layer was formed by anodization at low potentials in molybdate solution. The outer layer was a PPy film electrosynthesized in sodium salicylate solution. The conditions of the formation were determined to obtain a layer with globular morphology. The bilayer was characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The corrosion protection properties of the coatings were examined in Ringer solution by monitoring the open circuit potential (OCP), polarization techniques, and electrochemical impedance spectroscopy (EIS). The obtained results showed that the bilayer improves the corrosion resistance of the substrate. Moreover, the duplex coating presented better anticorrosive properties than a single PPy film. Afterwards, the bilayer was modified by cementation of silver ions from a solution containing AgNO3. The modified electrode exhibited good antibacterial properties.http://www.doiserbia.nb.rs/img/doi/0352-5139/2020/0352-51392000027F.pdfmg substrateanticorrosionelectrodeposited polypyrrolemolybdatesalycilate |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Forero López Ana D. Loperena Ana P. Lehr Ivana L. Brugnoni Lorena I. Saidman Silvana B. |
spellingShingle |
Forero López Ana D. Loperena Ana P. Lehr Ivana L. Brugnoni Lorena I. Saidman Silvana B. Corrosion protection of AZ91D magnesium alloy by a duplex coating Journal of the Serbian Chemical Society mg substrate anticorrosion electrodeposited polypyrrole molybdate salycilate |
author_facet |
Forero López Ana D. Loperena Ana P. Lehr Ivana L. Brugnoni Lorena I. Saidman Silvana B. |
author_sort |
Forero López Ana D. |
title |
Corrosion protection of AZ91D magnesium alloy by a duplex coating |
title_short |
Corrosion protection of AZ91D magnesium alloy by a duplex coating |
title_full |
Corrosion protection of AZ91D magnesium alloy by a duplex coating |
title_fullStr |
Corrosion protection of AZ91D magnesium alloy by a duplex coating |
title_full_unstemmed |
Corrosion protection of AZ91D magnesium alloy by a duplex coating |
title_sort |
corrosion protection of az91d magnesium alloy by a duplex coating |
publisher |
Serbian Chemical Society |
series |
Journal of the Serbian Chemical Society |
issn |
0352-5139 1820-7421 |
publishDate |
2020-01-01 |
description |
A duplex coating was formed under potentiostatic conditions on magnesium alloy AZ91D in order to improve its corrosion resistance in a simulated physiological environment. The first layer was formed by anodization at low potentials in molybdate solution. The outer layer was a PPy film electrosynthesized in sodium salicylate solution. The conditions of the formation were determined to obtain a layer with globular morphology. The bilayer was characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The corrosion protection properties of the coatings were examined in Ringer solution by monitoring the open circuit potential (OCP), polarization techniques, and electrochemical impedance spectroscopy (EIS). The obtained results showed that the bilayer improves the corrosion resistance of the substrate. Moreover, the duplex coating presented better anticorrosive properties than a single PPy film. Afterwards, the bilayer was modified by cementation of silver ions from a solution containing AgNO3. The modified electrode exhibited good antibacterial properties. |
topic |
mg substrate anticorrosion electrodeposited polypyrrole molybdate salycilate |
url |
http://www.doiserbia.nb.rs/img/doi/0352-5139/2020/0352-51392000027F.pdf |
work_keys_str_mv |
AT forerolopezanad corrosionprotectionofaz91dmagnesiumalloybyaduplexcoating AT loperenaanap corrosionprotectionofaz91dmagnesiumalloybyaduplexcoating AT lehrivanal corrosionprotectionofaz91dmagnesiumalloybyaduplexcoating AT brugnonilorenai corrosionprotectionofaz91dmagnesiumalloybyaduplexcoating AT saidmansilvanab corrosionprotectionofaz91dmagnesiumalloybyaduplexcoating |
_version_ |
1724283989830664192 |