A study on microstructure and corrosion resistance of ZrO2-containing PEO coatings formed on AZ31 Mg alloy in phosphate-based electrolyte

Zhuang, Jingjing; Yu, Guoqing; Xiang, Nan; Xiong, Ying; Hu, Qiang; Song, Renguo

doi:10.1016/j.apsusc.2015.10.025

Cited by 78 publications

(25 citation statements)

References 27 publications

(39 reference statements)

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“…6,7 Many researchers have addressed that the properties of PEO coating can be affected by composition of electrolyte, 8 treatment time, 9 electrical parameters, 10 etc. To obtain desired coatings, many investigation on the influence factors of PEO process have been done in recent years.…”

Section: Introductionmentioning

confidence: 99%

Effect of current density on microstructure and properties of PEO ceramic coatings on magnesium alloy

Zhuang

Song

Xiang

et al. 2017

Surface Engineering

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Plasma electrolytic oxidation (PEO) coatings were produced on AZ31 magnesium alloy in a phosphate-based electrolyte with current density varying from 5 to 20 A dm −2 . The influences of the current density on the PEO process and resulting coating characteristics were discussed. The coating morphology and phase composition were studied by scanning electron microscopy and X-ray diffraction technique, respectively. The corrosion performance of the coatings was evaluated in 3.5 wt-% NaCl solution using potentiodynamic polarisation scans. The electrochemical corrosion results proved that the coating produced at current density of 10 A dm −2 shows the best corrosion resistance. The tribological test suggested that the ceramic coating produced at 10 A dm −2 exhibited the most superior wear resistance.

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Section: Introductionmentioning

confidence: 99%

Effect of current density on microstructure and properties of PEO ceramic coatings on magnesium alloy

Zhuang

Song

Xiang

et al. 2017

Surface Engineering

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“…These pores were formed by the molten oxide and gas bubbles, which emitted out of the arc discharge channels during the PEO process. The microcracks were caused by excess thermal stress during the fast solidification of the melts when the coatings surface come in contact with the electrolytic solutions [29,30]. However, the coating formed in the fluorozirconate electrolytes was much more homogeneous than the conventional one (Figure 2c,d), suggesting that the high concentration of K 2 ZrF 6 was beneficial for removing the large-size pores in the coating [31].…”

Section: Cytotoxicity and Cell Morphology Examinationmentioning

confidence: 99%

Comparison of Corrosion Resistance and Cytocompatibility of MgO and ZrO2 Coatings on AZ31 Magnesium Alloy Formed via Plasma Electrolytic Oxidation

Wang

Nai

et al. 2018

Coatings

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In this work, one coating is comprised of ZrO 2 and the other consists of MgO as main phase composition was produced on AZ31 magnesium alloy using one-step plasma electrolytic oxidation (PEO). The purpose of this work was to study the corrosion resistance and cytocompatibility of the above-coated AZ31 magnesium alloys in order to provide a basis for AZ31 Mg alloy's clinical applications of biomedical use. The morphology and phase composition of the coatings were studied using scanning electron microscopy (SEM) and X-ray diffraction (XRD). The corrosion properties were examined using electrochemical testing, hydrogen evolution measurements, and immersion tests in a simulated body fluid (SBF). Compared with bare magnesium and the MgO coating, the ZrO 2 -containing coating exhibited an improved corrosion resistance. Cell proliferation assays and cell morphology observations showed that the ZrO 2 -containing coating was not toxic to the L-929 cells. The ZrO 2 coating was much denser and more homogeneous than the MgO coating, hence the corrosion resistance of the ZrO 2 -coated AZ31 Mg alloy was superior and more stable than the MgO-coated AZ31 Mg alloy, and ZrO 2 /AZ31 did not induce a cytotoxic reaction to L-929 cells and promote cell growth.

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“…마그네슘 합금은 경량 고강도의 특성을 가지고 있는 재료로써 자동차 항공 전자 산업 제품에 있 , , 어 중요한 가공 금속 재료로 사용되어 지고 있다 [1] . 하지만 다른 금속들에 비해 부식에 취약한 성 질을 가지고 있어 그 응용에 있어 제한을 받는다.…”

Section: 서 론unclassified

Laser Surface Treatment of Magnesium Alloy using ZrO₂for Corrosion Resistance

Yoon¹,

Kang²,

Joohan³

2016

Journal of the Korean Society of Manufacturing Process Engineer

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The laser surface treatment of magnesium alloy was studied. ZrO2 was used as sintering ceramics, and its corrosion resistance was verified. Appropriate laser parameters were proposed for homogeneous solidification of the sintered layer. The chemical compositions of the sintered layer were analyzed with laser-induced breakdown spectroscopy. Na2SO4 was used for a corrosion test, and the resistance of the sintered sample was confirmed. The microstructures of the sintered parts were also examined. The solidified grains on the top sintered surface were observed; however, reasonable fusion was obtained at the interface between the baseline and the ceramics. Laser surface treatment using ZrO2 on magnesium alloy showed an improvement in corrosion resistance.

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A study on microstructure and corrosion resistance of ZrO2-containing PEO coatings formed on AZ31 Mg alloy in phosphate-based electrolyte

Cited by 78 publications

References 27 publications

Effect of current density on microstructure and properties of PEO ceramic coatings on magnesium alloy

Effect of current density on microstructure and properties of PEO ceramic coatings on magnesium alloy

Comparison of Corrosion Resistance and Cytocompatibility of MgO and ZrO2 Coatings on AZ31 Magnesium Alloy Formed via Plasma Electrolytic Oxidation

Laser Surface Treatment of Magnesium Alloy using ZrO₂for Corrosion Resistance

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A study on microstructure and corrosion resistance of ZrO2-containing PEO coatings formed on AZ31 Mg alloy in phosphate-based electrolyte

Cited by 78 publications

References 27 publications

Effect of current density on microstructure and properties of PEO ceramic coatings on magnesium alloy

Effect of current density on microstructure and properties of PEO ceramic coatings on magnesium alloy

Comparison of Corrosion Resistance and Cytocompatibility of MgO and ZrO2 Coatings on AZ31 Magnesium Alloy Formed via Plasma Electrolytic Oxidation

Laser Surface Treatment of Magnesium Alloy using ZrO2for Corrosion Resistance

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Laser Surface Treatment of Magnesium Alloy using ZrO₂for Corrosion Resistance