Effect of Graphene Oxide as an Anodizing Additive for the ZK60A Magnesium Alloy: Correlating Corrosion Resistance, Surface Chemistry and Film Morphology
The aim of the present work was to study the effect of graphene oxide as an additive in the anodization bath of the ZK60A magnesium alloy on the corrosion resistance, film morphology and surface chemical composition. The anodizing process was conducted at a constant current density of 30 mA.cm<su...
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MDPI AG
2024-02-01
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| author | Paula Lima Braga Denise Criado Pereira de Souza Mara Cristina Lopes de Oliveira Renato Altobelli Antunes |
| author_facet | Paula Lima Braga Denise Criado Pereira de Souza Mara Cristina Lopes de Oliveira Renato Altobelli Antunes |
| author_sort | Paula Lima Braga |
| collection | DOAJ |
| description | The aim of the present work was to study the effect of graphene oxide as an additive in the anodization bath of the ZK60A magnesium alloy on the corrosion resistance, film morphology and surface chemical composition. The anodizing process was conducted at a constant current density of 30 mA.cm<sup>−2</sup> in an electrolyte consisting of 3 M de KOH, 0.15 M de Na<sub>2</sub>SiO<sub>3</sub> and 0.1 M Na<sub>2</sub>B<sub>4</sub>O<sub>7</sub>.10H<sub>2</sub>O. Graphene oxide was added to this bath at three different concentrations: 0.5 g.L<sup>−1</sup>, 1.0 g.L<sup>−1</sup> and 3.0 g.L<sup>−1</sup>. The ability of the graphene oxide nanofiller to enhance the corrosion resistance of the ZK60A alloy was evaluated by electrochemical impedance spectroscopy and potentiodynamic polarization tests in 3.5 wt.% NaCl solution. The surface chemical composition was assessed by X-ray photoelectron spectroscopy (XPS). Scanning electron microscopy (SEM) coupled with EDS analysis was employed to examine the anodized layer morphology and thickness. The results pointed to a beneficial effect of graphene oxide addition on the corrosion resistance of the anodized ZK60A which was dependent on the concentration of the nanofiller in the anodizing electrolyte. |
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| spelling | doaj.art-301560b646aa4e318ed0a46faefa0f882024-02-23T15:27:22ZengMDPI AGMetals2075-47012024-02-0114221010.3390/met14020210Effect of Graphene Oxide as an Anodizing Additive for the ZK60A Magnesium Alloy: Correlating Corrosion Resistance, Surface Chemistry and Film MorphologyPaula Lima Braga0Denise Criado Pereira de Souza1Mara Cristina Lopes de Oliveira2Renato Altobelli Antunes3Centro de Engenharia, Modelagem e Ciências Sociais Aplicadas (CECS), Universidade Federal do ABC (UFABC), Santo André 09210-580, SP, BrazilCentro de Ciências Naturais e Humanas (CCNH), Universidade Federal do ABC (UFABC), Santo André 09210-580, SP, BrazilCentro de Engenharia, Modelagem e Ciências Sociais Aplicadas (CECS), Universidade Federal do ABC (UFABC), Santo André 09210-580, SP, BrazilCentro de Engenharia, Modelagem e Ciências Sociais Aplicadas (CECS), Universidade Federal do ABC (UFABC), Santo André 09210-580, SP, BrazilThe aim of the present work was to study the effect of graphene oxide as an additive in the anodization bath of the ZK60A magnesium alloy on the corrosion resistance, film morphology and surface chemical composition. The anodizing process was conducted at a constant current density of 30 mA.cm<sup>−2</sup> in an electrolyte consisting of 3 M de KOH, 0.15 M de Na<sub>2</sub>SiO<sub>3</sub> and 0.1 M Na<sub>2</sub>B<sub>4</sub>O<sub>7</sub>.10H<sub>2</sub>O. Graphene oxide was added to this bath at three different concentrations: 0.5 g.L<sup>−1</sup>, 1.0 g.L<sup>−1</sup> and 3.0 g.L<sup>−1</sup>. The ability of the graphene oxide nanofiller to enhance the corrosion resistance of the ZK60A alloy was evaluated by electrochemical impedance spectroscopy and potentiodynamic polarization tests in 3.5 wt.% NaCl solution. The surface chemical composition was assessed by X-ray photoelectron spectroscopy (XPS). Scanning electron microscopy (SEM) coupled with EDS analysis was employed to examine the anodized layer morphology and thickness. The results pointed to a beneficial effect of graphene oxide addition on the corrosion resistance of the anodized ZK60A which was dependent on the concentration of the nanofiller in the anodizing electrolyte.https://www.mdpi.com/2075-4701/14/2/210ZK60A magnesium alloyanodizationgraphene oxidecorrosion |
| spellingShingle | Paula Lima Braga Denise Criado Pereira de Souza Mara Cristina Lopes de Oliveira Renato Altobelli Antunes Effect of Graphene Oxide as an Anodizing Additive for the ZK60A Magnesium Alloy: Correlating Corrosion Resistance, Surface Chemistry and Film Morphology Metals ZK60A magnesium alloy anodization graphene oxide corrosion |
| title | Effect of Graphene Oxide as an Anodizing Additive for the ZK60A Magnesium Alloy: Correlating Corrosion Resistance, Surface Chemistry and Film Morphology |
| title_full | Effect of Graphene Oxide as an Anodizing Additive for the ZK60A Magnesium Alloy: Correlating Corrosion Resistance, Surface Chemistry and Film Morphology |
| title_fullStr | Effect of Graphene Oxide as an Anodizing Additive for the ZK60A Magnesium Alloy: Correlating Corrosion Resistance, Surface Chemistry and Film Morphology |
| title_full_unstemmed | Effect of Graphene Oxide as an Anodizing Additive for the ZK60A Magnesium Alloy: Correlating Corrosion Resistance, Surface Chemistry and Film Morphology |
| title_short | Effect of Graphene Oxide as an Anodizing Additive for the ZK60A Magnesium Alloy: Correlating Corrosion Resistance, Surface Chemistry and Film Morphology |
| title_sort | effect of graphene oxide as an anodizing additive for the zk60a magnesium alloy correlating corrosion resistance surface chemistry and film morphology |
| topic | ZK60A magnesium alloy anodization graphene oxide corrosion |
| url | https://www.mdpi.com/2075-4701/14/2/210 |
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