Optimization of AZ31B Magnesium Alloy Anodizing Process in NaOH-Na2SiO3-Na2B4O7 Environmental-Friendly Electrolyte

S, Pan; Tu, Xiaohua; Yu, Jianxing; Zhang, Yang; Miao, Changwen; Xu, Yaling; Fu, Rui; Li, Jiayou

doi:10.3390/coatings12050578

Cited by 6 publications

(2 citation statements)

References 39 publications

(43 reference statements)

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“…Anodization is a common protective method for enhancing the corrosion properties of magnesium alloys. The process is based on the electrolytic anodic oxidation of the metallic surface, converting it into an oxide layer in an electrolyte with controlled composition [18][19][20]. Species from the electrolyte are incorporated into the anodized layer, providing it with functional properties [21,22].…”

Section: Introductionmentioning

confidence: 99%

Effect of Graphene Oxide as an Anodizing Additive for the ZK60A Magnesium Alloy: Correlating Corrosion Resistance, Surface Chemistry and Film Morphology

Braga,

de Souza,

de Oliveira

et al. 2024

Metals

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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−2 in an electrolyte consisting of 3 M de KOH, 0.15 M de Na2SiO3 and 0.1 M Na2B4O7.10H2O. Graphene oxide was added to this bath at three different concentrations: 0.5 g.L−1, 1.0 g.L−1 and 3.0 g.L−1. 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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Section: Introductionmentioning

confidence: 99%

Effect of Graphene Oxide as an Anodizing Additive for the ZK60A Magnesium Alloy: Correlating Corrosion Resistance, Surface Chemistry and Film Morphology

Braga,

de Souza,

de Oliveira

et al. 2024

Metals

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show abstract

“…Corrosion protection methods are, therefore, a must-attend issue for expanding the engineering applications of magnesium and its alloys. For practical purposes, anodization has been widely employed to form protective oxide layers on these materials [8][9][10] . Typically, alkaline electrolytes are employed to produce stable oxide growth during the electrolytic treatment of the magnesium substrate 11,12 .…”

Section: Introductionmentioning

confidence: 99%

Effect of Anodization on the Stress Corrosion Cracking Behavior of The AZ61 Magnesium Alloy in 0.1 M NaCl Solution

et al. 2023

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The treatment was conducted at two different current densities, 20 and 30 mA.cm -2 for 10 minutes. The anodized layers were characterized by scanning electron microscopy, X-ray diffractometry and X-ray photoelectron spectroscopy. The corrosion resistance was assessed by potentiodynamic polarization tests. The SCC behavior was studied using slow strain rate tests in 0.1 M NaCl solution at room temperature. Conventional tensile tests were also conducted in air. The susceptibility to SCC was dependent on the morphology of the anodized film. The composition of the electrolyte and the current density of the anodization treatment affected the SCC susceptibility of the AZ61 alloy. The best corrosion resistance and the lowest susceptibility to SCC were obtained for samples anodized in the borate-containing electrolyte at 30 mA.cm -2 . The smooth and compact surface morphology of the anodized film obtained in this condition was the main reason for the improved SCC behavior of the AZ61 alloy.

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Sealing of Anodized AZ31B Magnesium Alloy in Lanthanum-Based Solution: Interplay Between Sealing Parameters, Surface Chemistry, and Corrosion Resistance

Oliveira

Okamoto

Masoumi

et al. 2023

J. of Materi Eng and Perform

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Optimization of AZ31B Magnesium Alloy Anodizing Process in NaOH-Na2SiO3-Na2B4O7 Environmental-Friendly Electrolyte

Cited by 6 publications

References 39 publications

Effect of Graphene Oxide as an Anodizing Additive for the ZK60A Magnesium Alloy: Correlating Corrosion Resistance, Surface Chemistry and Film Morphology

Effect of Graphene Oxide as an Anodizing Additive for the ZK60A Magnesium Alloy: Correlating Corrosion Resistance, Surface Chemistry and Film Morphology

Effect of Anodization on the Stress Corrosion Cracking Behavior of The AZ61 Magnesium Alloy in 0.1 M NaCl Solution

Sealing of Anodized AZ31B Magnesium Alloy in Lanthanum-Based Solution: Interplay Between Sealing Parameters, Surface Chemistry, and Corrosion Resistance

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