Environmental friendly anodizing of AZ91D magnesium alloy in alkaline borate–benzoate electrolyte

Liu, Yan; Wei, Zhilong; Yang, Fuqiang; Zhang, Zhao

doi:10.1016/j.jallcom.2011.03.083

Cited by 45 publications

(24 citation statements)

References 47 publications

(50 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…6c 29 . To better describe the interfacial heterogeneities of the coatings, the more general constant phase element ( CPE ) was used instead of a rigid capacitive element 30 .…”

Section: Resultsmentioning

confidence: 99%

Toward a nearly defect-free coating via high-energy plasma sparks

Kaseem

Yang

2017

Sci Rep

View full text Add to dashboard Cite

A nearly defect-free metal-oxide-based coating structure was made on Al-Mg-Si alloy by plasma electrolytic oxidation at high current density accompanying high-energy plasma sparks. The present coatings were performed at two different current densities of 50 and 125 mA/cm2 in the alkaline-phosphate-based electrolytes with different concentrations of sodium hexafluoroaluminate (Na3AlF6). The addition of (Na3AlF6) to the electrolyte used in this study would result in a decrease in the size of the micropore, and a reasonably defect-free coating structure was achieved in the sample treated at high current density of 125 mA/cm2. This was attributed mainly to the hydrolysis of AlF6 3− triggered by intense plasma sparks, which resulted in a uniform distribution of fluorine throughout the coating. Accordingly, the corrosion performance of the coating formed in the electrolyte containing 1.5 g/L Na3AlF6 at 125 mA/cm2 was improved significantly as confirmed by electrochemical impedance analysis. In addition, the formation mechanism of the nearly defect-free coating in the presence of Na3AlF6 was discussed.

show abstract

“…6c 29 . To better describe the interfacial heterogeneities of the coatings, the more general constant phase element ( CPE ) was used instead of a rigid capacitive element 30 .…”

Section: Resultsmentioning

confidence: 99%

Toward a nearly defect-free coating via high-energy plasma sparks

Kaseem

Yang

2017

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The borate benzoate electrolyte was composed of 60 g/L NaOH, 25 g/L Na2B4O7, 20 g/L H3BO3, and 3 g/L NaBz (sodium benzoate: C6H5COONa) [24]. During the anodizing experiments, the temperature of the electrolyte was held at 30℃ using a hot plate.…”

Section: Electrolytementioning

confidence: 99%

Super-hydrophobic stearic acid layer formed on anodized high purified magnesium for improving corrosion resistance of bioabsorbable implants

Khalifeh

Burleigh

2018

Journal of Magnesium and Alloys

View full text Add to dashboard Cite

Magnesium and its alloys are ideal candidates for biodegradable implants. However, they can dissolve too rapidly in the human body for most applications. In this research, high purified magnesium (HP-Mg) was coated with stearic acid in order to slow the corrosion rate of magnesium in simulated body fluid at 37℃. HP-Mg was anodized to form an oxide/hydroxide layer, then it was immersed in a stearic acid solution. Electrochemical impedance spectroscopy and potentiodynamic polarization were used to estimate the corrosion rate of HP-Mg specimens. The results confirm that the hydrophobic coating can temporarily decrease the corrosion rate of HP-Mg by 1000x.

show abstract

“…For several decades, as excellent light metal and structural materials, magnesium alloys have been widely used in industrial fields such as transportation, building, electronic products, etc [1][2][3][4][5][6][7][8] . Furthermore, because of non-toxic properties and good biocompatibility, magnesium alloys are increasingly focused on the biomedical field [9][10][11] .…”

Section: Introductionmentioning

confidence: 99%

“…Multiple approaches have been explored to synthesize the coating layer on the surface of magnesium alloy, including anodic or microarc oxidation 3,5,14 , magnetron sputtering 4,6 , cathodic arc deposition 12 , friction stir welding with polymer coating 15 , etc. Except magnetron sputtering, the aims of the above techniques are synthesizing compact oxidation layer on the surface of magnesium alloys by means of complicated chemical or electrochemical reaction.…”

Section: Introductionmentioning

confidence: 99%

Surface Properties Contrast between Al Films and TiO2 Films Coated on Magnesium Alloys by Magnetron Sputtering

Zhu

Chen

et al. 2017

Mat. Res.

View full text Add to dashboard Cite

Al films and TiO 2 films were separately coated on AZ31 magnesium alloy substrates by means of magnetron sputtering method. The surface properties of the samples were explored and compared. Scanning electron microscope (SEM) observed the compact structure characteristics of as-deposited Al films and TiO 2 films. After heat treatment under 200ºC for half an hour the films kept the compact structure characteristics and there didn't exist structural defects on the surface of the films. Nano-indentation measurement results display that the micro-hardness of as-deposited Al film and TiO 2 film reaches about 1.90 Gpa and 1.51 Gpa, separately. Al film is a bit harder than TiO 2 film. Finally, the corrosion experiments in simulated body fluid initially indicate the different corrosion properties for Al film and TiO 2 film. Al film presents more effective anti-corrosion properties than TiO 2 film.

show abstract

Environmental friendly anodizing of AZ91D magnesium alloy in alkaline borate–benzoate electrolyte

Cited by 45 publications

References 47 publications

Toward a nearly defect-free coating via high-energy plasma sparks

Toward a nearly defect-free coating via high-energy plasma sparks

Super-hydrophobic stearic acid layer formed on anodized high purified magnesium for improving corrosion resistance of bioabsorbable implants

Surface Properties Contrast between Al Films and TiO2 Films Coated on Magnesium Alloys by Magnetron Sputtering

Contact Info

Product

Resources

About