Effects of electric parameters on properties of anodic coatings formed on magnesium alloys

Zhang, R.F.; Shan, Dayong; Chen, Runzhe; Han, En‐Hou

doi:10.1016/j.matchemphys.2007.07.027

Cited by 104 publications

(40 citation statements)

References 17 publications

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“…Among them, micro-arc oxidation (MAO) is recognized the most favorable one [4]. Typical MAO films have a ceramic structure with relatively high porosity [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Corrosion behavior of a self-sealing pore micro-arc oxidation film on AM60 magnesium alloy

et al. 2015

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“…Among them, micro-arc oxidation (MAO) is recognized the most favorable one [4]. Typical MAO films have a ceramic structure with relatively high porosity [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Corrosion behavior of a self-sealing pore micro-arc oxidation film on AM60 magnesium alloy

et al. 2015

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“…For example, numerous investigations have been carried out on the influence of process parameters on MAO coating deposition; [6][7][8][9][10][11][12][13][14] the growth, formation, and structure of MAO coatings; [15][16][17][18][19][20][21][22][23][24][25] and also on the physical, mechanical, and tribological properties of MAO coatings. [26][27][28][29][30][31] The electrolyte chemistry not only influences the nature of the pore (open or closed) and its size distribution in the coating, but also the phases present in the coating, and both these factors have a bearing on the corrosion performance of the MAO coating.…”

Section: Introductionmentioning

confidence: 99%

Influence of Electrolyte Chemistry on Morphology and Corrosion Resistance of Micro Arc Oxidation Coatings Deposited on Magnesium

Krishna

Poshal

Sundararajan

2010

Metall Mater Trans A

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In the present work, micro arc oxidation (MAO) coatings were synthesized on magnesium substrate employing 11 different electrolyte compositions containing systematically varied concentrations of sodium silicate (Na 2 SiO 3 ), potassium hydroxide (KOH), and sodium aluminate (NaAlO 2 ). The resultant coatings were subjected to coating thickness measurement, energy dispersive spectroscopy (EDS), scanning electron microscopy (SEM), image analysis, and three-dimensional (3-D) optical profilometry. The corrosion performance of the coatings was evaluated by conducting potentiodynamic polarization tests in 3.5 wt pct NaCl solution. The inter-relationships between the electrolyte chemistry and the resulting chemistry and porosity of the coating, on one hand, and with the aqueous corrosion behavior of the coating, on the other, were studied. The changes in pore morphology and pore distribution in the coatings were found to be significantly influenced by the electrolyte composition. The coatings can have either through-thickness pores or pores in the near surface region alone depending on the electrolyte composition. The deleterious role of KOH especially when its concentration is >20 pct of total electrolyte constituents promoting the formation of large and deep pores in the coating was demonstrated. A reasonable correlation indicating the increasing pore volume implying the increased corrosion was noticed.

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“…Generally, furious sparking at high current density result in large size of chunks, pores and higher degree of micro-cracks on the anodized film [50]. This kind of anodized film is poor in quality.…”

Section: Working Mechanism Of Nabz Additivementioning

confidence: 99%

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

Liu

Wei

Yang

et al. 2011

Journal of Alloys and Compounds

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Effects of electric parameters on properties of anodic coatings formed on magnesium alloys

Cited by 104 publications

References 17 publications

Corrosion behavior of a self-sealing pore micro-arc oxidation film on AM60 magnesium alloy

Corrosion behavior of a self-sealing pore micro-arc oxidation film on AM60 magnesium alloy

Influence of Electrolyte Chemistry on Morphology and Corrosion Resistance of Micro Arc Oxidation Coatings Deposited on Magnesium

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

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