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New insights on the influence of low frequency pulsed current on the characteristics of PEO coatings formed on AZ31B
dc.creator | Toro L. | |
dc.creator | Zuleta A.A. | |
dc.creator | Correa E. | |
dc.creator | Calderón D. | |
dc.creator | Galindez Y. | |
dc.creator | Calderón J. | |
dc.creator | Chacón P. | |
dc.creator | Valencia-Escobar A. | |
dc.creator | Echeverría E F. | |
dc.date | 2020 | |
dc.date.accessioned | 2020-04-29T14:53:49Z | |
dc.date.available | 2020-04-29T14:53:49Z | |
dc.identifier.issn | 20531591 | |
dc.identifier.uri | http://hdl.handle.net/11407/5737 | |
dc.description | In this work, anodic oxide layers on the surface of an AZ31 magnesium alloy were obtained by plasma electrolytic oxidation (PEO) process under low frequency pulsed current. For this, electrolytical solutions containing hexamethylenetetramine and sodium fluoride were used. The morphology and chemical composition of formed coatings were examined by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). Also, salt spray test, hydrogen evolution and electrochemical tests (potentiodynamic polarization and electrochemical impedance spectroscopy) were conducted in order to study the corrosion behavior of the coated samples. It was found that the use of low frequency pulsed current for the PEO process reduces the film porosity and increases its thickness, compared with PEO films obtained by continuous anodization. The effect of the pulsed current signal was also analyzed for a two steps PEO process, observing changes in the morphological characteristics of the coatings which allow a better corrosion according electrochemical tests (short term corrosion measurements). However, long term tests results as hydrogen evolution and salt spray tests, indicated the opposite. Both the film porosity and thickness were affected by either the pulsing of the current or the use of a two-step process. © 2020 The Author(s). Published by IOP Publishing Ltd. | |
dc.language.iso | eng | |
dc.publisher | Institute of Physics Publishing | |
dc.relation.isversionof | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85078114537&doi=10.1088%2f2053-1591%2fab61ac&partnerID=40&md5=7a4ad2169e0860bd2a75097f1fe97774 | |
dc.source | Materials Research Express | |
dc.subject | anodizing | |
dc.subject | corrosion | |
dc.subject | Mg-Al-Zn alloys | |
dc.subject | plasma electrolytic oxidation | |
dc.subject | salt fog test | |
dc.subject | Aluminum alloys | |
dc.subject | Aluminum corrosion | |
dc.subject | Anodic oxidation | |
dc.subject | Atmospheric corrosion | |
dc.subject | Coatings | |
dc.subject | Corrosion | |
dc.subject | Corrosive effects | |
dc.subject | Electrochemical impedance spectroscopy | |
dc.subject | Electrolysis | |
dc.subject | Energy dispersive spectroscopy | |
dc.subject | Fourier transform infrared spectroscopy | |
dc.subject | Hydrogen | |
dc.subject | Magnesium alloys | |
dc.subject | Morphology | |
dc.subject | Porosity | |
dc.subject | Scanning electron microscopy | |
dc.subject | Seawater corrosion | |
dc.subject | Sodium Fluoride | |
dc.subject | Ternary alloys | |
dc.subject | Testing | |
dc.subject | Zinc alloys | |
dc.subject | Chemical compositions | |
dc.subject | Corrosion measurements | |
dc.subject | Electrochemical test | |
dc.subject | Energy dispersive spectroscopies (EDS) | |
dc.subject | Mg-Al -Zn alloys | |
dc.subject | Morphological characteristic | |
dc.subject | Plasma electrolytic oxidation | |
dc.subject | Salt fog test | |
dc.subject | Electrochemical corrosion | |
dc.title | New insights on the influence of low frequency pulsed current on the characteristics of PEO coatings formed on AZ31B | |
dc.type | Article | eng |
dc.rights.accessrights | info:eu-repo/semantics/restrictedAccess | |
dc.publisher.program | Ingeniería de Materiales | |
dc.identifier.doi | 10.1088/2053-1591/ab61ac | |
dc.relation.citationvolume | 7 | |
dc.relation.citationissue | 1 | |
dc.publisher.faculty | Facultad de Ingenierías | |
dc.affiliation | Toro, L., Centro de Investigación, Innovación y Desarrollo de Materiales CIDEMAT, Facultad de Ingeniería, Universidad de Antioquia U. de A., Calle 70 No. 52-21, Medellín, Colombia; Zuleta, A.A., Grupo de Investigación de Estudios en Diseo - GED, Facultad de Diseo Industrial, Universidad Pontificia Bolivariana, Circular 1a. N° 70-01, Medellín, Colombia; Correa, E., Grupo de Investigación Materiales Con Impacto - MATandMPAC, Facultad de Ingenierías, Universidad de Medellín, Carrera 87 No 30 65, Medellín, Colombia; Calderón, D., Centro de Investigación, Innovación y Desarrollo de Materiales CIDEMAT, Facultad de Ingeniería, Universidad de Antioquia U. de A., Calle 70 No. 52-21, Medellín, Colombia; Galindez, Y., Centro de Investigación, Innovación y Desarrollo de Materiales CIDEMAT, Facultad de Ingeniería, Universidad de Antioquia U. de A., Calle 70 No. 52-21, Medellín, Colombia; Calderón, J., Centro de Investigación, Innovación y Desarrollo de Materiales CIDEMAT, Facultad de Ingeniería, Universidad de Antioquia U. de A., Calle 70 No. 52-21, Medellín, Colombia; Chacón, P., Grupo de Investigación de Estudios en Diseo - GED, Facultad de Diseo Industrial, Universidad Pontificia Bolivariana, Circular 1a. N° 70-01, Medellín, Colombia; Valencia-Escobar, A., Grupo de Investigación de Estudios en Diseo - GED, Facultad de Diseo Industrial, Universidad Pontificia Bolivariana, Circular 1a. N° 70-01, Medellín, Colombia; Echeverría E, F., Centro de Investigación, Innovación y Desarrollo de Materiales CIDEMAT, Facultad de Ingeniería, Universidad de Antioquia U. de A., Calle 70 No. 52-21, Medellín, Colombia | |
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dc.type.version | info:eu-repo/semantics/publishedVersion | |
dc.type.driver | info:eu-repo/semantics/article |
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