Effects of sealing treatment on corrosion resistance and degradation behavior of micro-arc oxidized magnesium alloy wires

Chu, Chenglin; Han, Xiaobin; Xue, Feng; Bai, Jing; Chu, Peggy Sau‐Kwan

doi:10.1016/j.apsusc.2013.01.175

Cited by 67 publications

(26 citation statements)

References 18 publications

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“…In both SIF and SBF, the gelatineHA coating can significantly retard the degradation rate and improve the corrosion resistance (Chu, Han, Xue, Bai, & Chu, 2013). Sealing is required if the lifetime of PEO coatings in physiological solutions should be extended and the dissolutions should be retarded or slowed down.…”

Section: Corrosion/biodegradationmentioning

confidence: 99%

Plasma electrolytic oxidation/micro-arc oxidation of magnesium and its alloys

Blawert¹,

Sah²,

Scharnagl³

et al. 2015

Surface Modification of Magnesium and Its Alloys for Biomedical Applications

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Section: Corrosion/biodegradationmentioning

confidence: 99%

Plasma electrolytic oxidation/micro-arc oxidation of magnesium and its alloys

Blawert¹,

Sah²,

Scharnagl³

et al. 2015

Surface Modification of Magnesium and Its Alloys for Biomedical Applications

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“…The huge application potential of Mg alloys in medical devices also creates the demand of Mg alloy fine wire with diameter of less than 0.5 mm [2][3][4][5][6]. Mg alloy fine wire, for example, can be made to prepare sutures or anastomotic nail for anastomosis, and also can be knitted to various kinds of tubular mesh stents, or used as reinforcement to prepare the polymer based composite for orthopedic surgery, etc.…”

Section: Introductionmentioning

confidence: 99%

Preparation, microstructure and degradation performance of biomedical magnesium alloy fine wires

Bai

Yin

et al. 2014

Progress in Natural Science: Materials International

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With the development of new biodegradable Mg alloy implant devices, the potential applications of biomedical Mg alloy fine wires are realized and explored gradually. In this study, we prepared three kinds of Mg alloy fine wires containing 4 wt% RE(Gd/Y/Nd) and 0.4 wt% Zn with the diameter less than 0.4 μm through casting, hot extruding and multi-pass cold drawing combined with intermediated annealing process. Their microstructures, mechanical and degradation properties were investigated. In comparison with the corresponding as-extruded alloy, the final fine wire has significantly refined grain with an average size of 3-4 μm, and meanwhile shows higher yield strength but lower ductility at room temperature. The degradation tests results and surface morphologies observations indicate that Mg-4Gd-0.4Zn and Mg-4Nd-0.4Zn fine wires have similar good corrosion resistance and the uniform corrosion behavior in SBF solution. By contrast, Mg-4Y-0.4Zn fine wire shows a poor corrosion resistance and the pitting corrosion behavior.

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“…Some corrosion inhibitors 23) or ceramic particles 24,25) were added into the PEO electrolyte or surface pretreatment 26) to improve the corrosion resistance of PEO films. Sealing of the PEO films to improve their corrosion protective property has been tried by immersion in boiling water 11,27) , alkaline phosphate and silicate 28) , stannate 29) and E-paint solution 30) , solgel coatings 27,28,31) and polymer or organic coatings 27,32) . Although a number of such works have been conducted to elucidate the effects of electrolyte compositions on the formation of PEO films on Mg alloys, still there is lack of information about the effects of OH -and SiO 3 2− ions in aqueous electrolyte on the formation and corrosion protective properties of PEO film formed on AZ31 Mg alloy.…”

Section: )mentioning

confidence: 99%

Effects of Hydroxide and Silicate ions on the Plasma Electrolytic Oxidation of AZ31 Mg Alloy

Moon¹,

Yang²,

Na³

2014

Journal of the Korean institute of surface engineering

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Formation behavior of PEO (Plasma Electrolytic Oxidation) films on AZ31 Mg alloy was studied in aqueous solutions containing various concentrations of hydroxide ion (OH − ) and silicate ion (SiO 3 2− ) by voltage-time curves, and corrosion resistance of the PEO film-covered specimen was investigated by immersion test in 0.5 M NaCl solution. From the analyses of the voltage-time curves, it is suggested that two different types of anions are essentially needed for the formation of PEO films on AZ31 Mg alloy: film formation agent and local film breakdown agent. SiO 3 2− ion acts only as a film formation agent but OH -ion acts not only as a film formation agent but also film breakdown agent. The PEO films prepared on AZ31 Mg alloy in alkaline silicate solution showed very good corrosion resistance without any pitting or filiform corrosions up to 480 h of immersion in 0.5 M NaCl.

show abstract

Effects of sealing treatment on corrosion resistance and degradation behavior of micro-arc oxidized magnesium alloy wires

Cited by 67 publications

References 18 publications

Plasma electrolytic oxidation/micro-arc oxidation of magnesium and its alloys

Plasma electrolytic oxidation/micro-arc oxidation of magnesium and its alloys

Preparation, microstructure and degradation performance of biomedical magnesium alloy fine wires

Effects of Hydroxide and Silicate ions on the Plasma Electrolytic Oxidation of AZ31 Mg Alloy

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