Corrosion resistance and surface biocompatibility of a microarc oxidation coating on a Mg–Ca alloy

Gu, Xuenan; Li, Nan; Zhou, Wenhao; Zheng, Yufeng; Zhao, Xuan; Cai, Qi; Ruan, Liquan

doi:10.1016/j.actbio.2010.11.034

Cited by 355 publications

(171 citation statements)

References 41 publications

Supporting

Mentioning

154

Contrasting

Unclassified

Order By: Relevance

“…Wang et al provide a compact overview of the basic methods available for surface treatment [35]. They hint to microarc oxidation [116], anodising [117], evaporation [118], alkaline heat treatment [119], fluoride coating [120], electro deposition [121], phosphate coating [122], shock peening [123], ion implantation [124], physical vapour enrichment [125] and polymer coating [126]. The aim of the process is always to reduce the oxidation tendency of the surface of the magnesium alloy or to provide the surface with a protective layer.…”

Section: Increasing the Corrosion Resistancementioning

confidence: 99%

Cardiovascular Applications of Magnesium Alloys

Schilling¹,

Bauer²,

LaLonde³

et al. 2017

Magnesium Alloys

View full text Add to dashboard Cite

Therapy in cardiovascular medicine often relies on implantation of prosthetic materials or application of stents. The diseases of many cardiovascular structures require their complete and immediate repair by utilising prosthetic materials. The ideal cardiovascular prosthesis involves good functional properties, capability of regeneration and does not activate the host's immune system. Ideally, the graft can be applied for a temporary use and degrades after a predefined period according to controlled degradation kinetics. Only biological grafts would provide this spectrum of properties by today's level of knowledge. However, biological prostheses exhibit some relevant drawbacks as well, such as insufficient mechanical stability or restricted availability. Implants or supporting structures of magnesium alloys would bridge this gap and would either provide a substrate for innovative and temporary grafts or would-as supporting structures-transiently add some missing properties to regenerative biological prostheses. This chapter reviews the different fields of cardiovascular therapeutic applications of magnesium alloys. The required properties of magnesium alloys and their preparation, fabrication and testing will be discussed under the specific cardiovascular perspective.

show abstract

Section: Increasing the Corrosion Resistancementioning

confidence: 99%

Cardiovascular Applications of Magnesium Alloys

Schilling¹,

Bauer²,

LaLonde³

et al. 2017

Magnesium Alloys

View full text Add to dashboard Cite

show abstract

“…Moreover, some nondegradable oxides, such as Mg(OH) 2 and MgO, may be produced during the procedure. 32,33 In order to avoid these drawbacks, we fabricate a Mg-based biomedical coating by conducting electrodeposition in organic solution. It is another advantage of our investigation, since the magnesium alloy can maintain its original surface composition without a chemical reaction with an electrolyte during the electrodeposition procedure.…”

Section: Introductionmentioning

confidence: 99%

One-Step Electrodeposition of Self-Assembled Colloidal Particles: A Novel Strategy for Biomedical Coating

et al. 2014

View full text Add to dashboard Cite

A novel biomedical coating was prepared from selfassembled colloidal particles through direct electrodeposition. The particles, which are photo-cross-linkable and nanoscaled with a high specific surface area, were obtained via self-assembly of amphiphilic poly(γ-glutamic acid)-g-7-amino-4-methylcoumarin (γ-PGA-g-AMC). The size, morphology, and surface charge of the resulting colloidal particles and their dependence on pH, initial concentrations, and UV irradiation were successfully studied. A nanostructured coating was formed in situ on the surface of magnesium alloys by electrodeposition of colloidal particles. The composition, morphology, and phase of the coating were monitored using Fourier transform infrared spectroscopy, energy-dispersive X-ray spectroscopy, scanning electron microscopy, and X-ray diffraction. The corrosion test showed that the formation of the nanostructured coating on magnesium alloys effectively improved their initial anticorrosion properties. More importantly, the corrosion resistance was further enhanced by chemical photo-cross-linking. In addition, the low cytotoxicity of the coated samples was confirmed by MTT assay against NIH-3T3 normal cells. The contribution of our work lies in the creation of a novel strategy to fabricate a biomedical coating in view of the versatility of self-assembled colloidal particles and the controllability of the electrodeposition process. It is believed that our work provides new ideas and reliable data to design novel functional biomedical coatings.

show abstract

“…Micro-arc oxidation (MAO), also known as plasma electrolytic oxidation or anodic spark deposition, is a novel, promising surface treatment, which has been developed and applied to magnesium and its alloys [27][28][29][30][31]. This technique has become one of the most prospective surface treatments due to the good adhesion and corrosion resistance of ceramic coatings.…”

Section: Introductionmentioning

confidence: 99%

Bio-Corrosion Behavior of Ceramic Coatings Containing Hydroxyapatite on Mg-Zn-Ca Magnesium Alloy

Ding

Wang

et al. 2018

Applied Sciences

View full text Add to dashboard Cite

Ceramic coatings containing hydroxyapatite (HA) were fabricated on a biodegradable Mg 66 Zn 29 Ca 5 magnesium alloy through micro-arc oxidation by adding HA particles into the electrolytes. The phase composition and surface morphology of the coatings were characterized by X-ray diffraction and scanning electron microscopy analyses, respectively. Electrochemical experiments and immersion tests were performed in Hank's solution at 37 • C to measure the corrosion resistance of the coatings. Blood compatibility was evaluated by in vitro blood platelet adhesion tests and static water contact angle measurement. The results show that the typical ceramic coatings with a porous structure were prepared on the magnesium alloy surface with the main phases of MgO and MgSiO 3 and a small amount of Mg 3 (PO 4 ) 2 and HA. The optimal surface morphology appeared at HA concentration of 0.4 g/L. The electrochemical experiments and immersion tests reveal a significant improvement in the corrosion resistance of the ceramic coatings containing HA compared with the coatings without HA or bare Mg 66 Zn 29 Ca 5 magnesium alloy. The static water contact angle of the HA-containing ceramic coatings is 18.7 • , which is lower than that of the coatings without HA (40.1 • ). The in vitro blood platelet adhesion tests indicate that the HA-containing ceramic coatings possess improved blood compatibility compared with the coatings without HA. Utilizing HA-containing ceramic coatings may be an effective way to improve the surface biocompatibility and corrosion resistance of magnesium alloys.

show abstract

Corrosion resistance and surface biocompatibility of a microarc oxidation coating on a Mg–Ca alloy

Cited by 355 publications

References 41 publications

Cardiovascular Applications of Magnesium Alloys

Cardiovascular Applications of Magnesium Alloys

One-Step Electrodeposition of Self-Assembled Colloidal Particles: A Novel Strategy for Biomedical Coating

Bio-Corrosion Behavior of Ceramic Coatings Containing Hydroxyapatite on Mg-Zn-Ca Magnesium Alloy

Contact Info

Product

Resources

About