Corrosion and Protection of Magnesium Alloy AZ31D by a New Conversion Coating

Han, En‐Hou; Zhou, Wan Qiu; Shan, Dayong; Ke, Wei

doi:10.4028/www.scientific.net/msf.419-422.879

Cited by 36 publications

(15 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Phosphate-permanganate and stannate conversion coatings are environmentally friendly and have shown good corrosion resistance comparable to chromate coating. Han et al [63] developed a conversion coating with Mn 3 (PO 4 ) 2 , which can heal by itself in salt solution. Gonzalez-Nunez et al [64] reported that a 2-3 lm thick crystalline coating of MgSnO 3 obtained with stannate treatments has a passivity effect; details on the corrosion resistance were not given.…”

Section: Other Conversion Coatingsmentioning

confidence: 99%

Progress and Challenge for Magnesium Alloys as Biomaterials

et al. 2008

View full text Add to dashboard Cite

Magnesium alloys are very biocompatiable and show promise for use in orthopaedic implant. Significant progress of research on bioabsorbable magnesium stents and orthopaedic bones has been achieved in recent years. The issues on degradation, hydrogen evolution, and corrosion fatigue and erosion corrosion of magnesium alloys and various influencing factors in simulated body fluid (SBF) are discussed. The research progress on magnesium and its alloys as biomaterials and miscellaneous approaches to enhancement in corrosion resistance is reviewed. Finally the challenges and strategy for their application as orthopaedic biomaterials are also proposed.

show abstract

Section: Other Conversion Coatingsmentioning

confidence: 99%

Progress and Challenge for Magnesium Alloys as Biomaterials

et al. 2008

View full text Add to dashboard Cite

show abstract

“…More recently, it is studied to seek environmentally friendly and high corrosion resisting films instead of chromate conversion coating [25][26][27][28]. A number of chromate-free conversion coatings have been developed, such as rare earth [29][30][31], phosphate [32][33][34], ionic liquid [35] and stannate conversion coatings [3,36]. Among these coatings, rare earth and stannate conversion coatings take long time and the ionic liquid conversion coatings are costly [1].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical behaviors of magnesium alloy with phosphate conversion coating in NaCl solutions

Dong

et al. 2016

Rare Met.

View full text Add to dashboard Cite

A composite conversion coating was prepared on magnesium alloy by the only one-step immersion treatment. The characteristics of the conversion coating were investigated by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The results indicate that the composite conversion coating consists of magnesium hydroxide, magnesium phosphate and manganese phosphate. The electrochemical behavior of the conversion coating was investigated systematically by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization measurement in different NaCl solutions. Polarization measurements and EIS results reveal that the magnesium alloy with the conversion coating have better corrosion resistance compared to the bare magnesium alloy in these conditions. And the corrosion rate of the magnesium alloy with conversion coating increases consistently with the chloride ion concentration. In alkaline conditions, the magnesium alloy with conversion coating has superior corrosion resistance by the synergistic effects between Mg(OH) 2 film and conversion coating. Moreover, the electrochemical corrosion mechanism of the magnesium alloy was analyzed with respect to the conversion coating in a Cl -containing environment.

show abstract

“…The treatment process did not prevent corrosion, but it did significantly slow down the degradation rate [171]. And a phosphate-permanganate process developed by Han et al using Mn 3 (PO 4 ) 2 was ab le to produce a resilient surface coating on a Mg alloy (AZ31D) that was self healing in saline solutions [172]. While a stannate treatment developed by Gonzalez-Nunez et al was able to deposit a 2 to 3 µm thick layer of MgSnO 3 on an Mg alloy (ZC71).…”

Section: Chemical Conversion Coatingsmentioning

confidence: 99%

Biomedical Magnesium Alloys: A Review of Material Properties, Surface Modifications and Potential as a Biodegradable Orthopaedic Implant

Poinern¹,

Brundavanam²,

Fawcett³

2013

AJBE

283

View full text Add to dashboard Cite

Magnesium and magnesium based alloys are lightweight metallic materials that are extremely biocompatib le and have similar mechanical properties to natural bone. These materials have the potential to function as an osteoconductive and biodegradable substitute in load bearing applicat ions in the field of hard t issue engineering. However, the effects of corrosion and degradation in the physiological environ ment of the body has prevented their wide spread applicat ion to date. The aim o f this review is to examine the properties, chemical stability, degradation in situ and methods of improving the corrosion resistance of magnesium and its alloys for potential application in the orthopaedic field. To be an effective imp lant, the surface and sub-surface properties of the material needs to be carefully selected so that the degradation kinetics of the implant can be efficiently controlled. Several surface modification techniques are presented and their effectiveness in reducing the corrosion rate and methods of controlling the degradation period are discussed. Ideally, balancing the gradual loss of material and mechanical strength during degradation, with the increasing strength and stability of the newly forming bone tissue is the ultimate goal. If this goal can be achieved, then orthopaedic implants manufactured fro m magnesium based alloys have the potential to deliver successful clinical outcomes without the need for revision surgery.

show abstract

Corrosion and Protection of Magnesium Alloy AZ31D by a New Conversion Coating

Cited by 36 publications

References 0 publications

Progress and Challenge for Magnesium Alloys as Biomaterials

Progress and Challenge for Magnesium Alloys as Biomaterials

Electrochemical behaviors of magnesium alloy with phosphate conversion coating in NaCl solutions

Biomedical Magnesium Alloys: A Review of Material Properties, Surface Modifications and Potential as a Biodegradable Orthopaedic Implant

Contact Info

Product

Resources

About