Materials Map

Discover the materials research landscape. Find experts, partners, networks.

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The Materials Map is an open tool for improving networking and interdisciplinary exchange within materials research. It enables cross-database search for cooperation and network partners and discovering of the research landscape.

The dashboard provides detailed information about the selected scientist, e.g. publications. The dashboard can be filtered and shows the relationship to co-authors in different diagrams. In addition, a link is provided to find contact information.

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The Materials Map is still under development. In its current state, it is only based on one single data source and, thus, incomplete and contains duplicates. We are working on incorporating new open data sources like ORCID to improve the quality and the timeliness of our data. We will update Materials Map as soon as possible and kindly ask for your patience.

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Cifuentes, Paula Andrea Chacon

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in Cooperation with on an Cooperation-Score of 37%

Topics

Publications (1/1 displayed)

  • 2020New insights on the influence of low frequency pulsed current on the characteristics of PEO coatings formed on AZ31B9citations

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Chart of shared publication
Calderon, Deanne
1 / 1 shared
Toro Gonzalez, Leidy Johanna
1 / 1 shared
Calderon, Jorge
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Zuleta Gil, Alejandro Alberto
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Echeverria, Felix
1 / 7 shared
Valencia, Andres
1 / 1 shared
Chart of publication period
2020

Co-Authors (by relevance)

  • Calderon, Deanne
  • Toro Gonzalez, Leidy Johanna
  • Calderon, Jorge
  • Zuleta Gil, Alejandro Alberto
  • Echeverria, Felix
  • Valencia, Andres
OrganizationsLocationPeople

article

New insights on the influence of low frequency pulsed current on the characteristics of PEO coatings formed on AZ31B

  • Cifuentes, Paula Andrea Chacon
  • Calderon, Deanne
  • Toro Gonzalez, Leidy Johanna
  • Calderon, Jorge
  • Zuleta Gil, Alejandro Alberto
  • Echeverria, Felix
  • Valencia, Andres
Abstract

<jats:title>Abstract</jats:title><jats:p>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.</jats:p>

Topics
  • impedance spectroscopy
  • morphology
  • surface
  • corrosion
  • scanning electron microscopy
  • x-ray diffraction
  • Magnesium
  • magnesium alloy
  • Magnesium
  • Sodium
  • Hydrogen
  • chemical composition
  • Energy-dispersive X-ray spectroscopy
  • porosity
  • Fourier transform infrared spectroscopy