Publication detail

Effect of fluoride on plasma electrolytic oxidation of AZ61 magnesium alloy

NĚMCOVÁ, A. SKELDON, P. THOMPSON, G. PACAL, B.

Original Title

Effect of fluoride on plasma electrolytic oxidation of AZ61 magnesium alloy

English Title

Effect of fluoride on plasma electrolytic oxidation of AZ61 magnesium alloy

Type

journal article - other

Language

en

Original Abstract

Plasma electrolytic oxidation has been carried out on AZ61 magnesium alloy in a silicate–phosphate electrolyte under pulsed current conditions. It is shown that the addition of fluoride to the electrolyte reduced localized corrosion that occurred near Al–Mn intermetallic particles before sparking begins. Such corrosion affected the uniformity of the PEO coating. On the other hand, fluoride ions caused significant loss of coating material during coating growth. Irrespective of the fluoride addition, the coatings contained Mg3(PO4)2, amorphous material and possibly MgO. However, fluoride strongly affected the rate of coating growth and the morphology of the coating. The loss of coating material is suggested to be due to the effects of fluoride ions on the intensity of the discharges and melting of the coating.

English abstract

Plasma electrolytic oxidation has been carried out on AZ61 magnesium alloy in a silicate–phosphate electrolyte under pulsed current conditions. It is shown that the addition of fluoride to the electrolyte reduced localized corrosion that occurred near Al–Mn intermetallic particles before sparking begins. Such corrosion affected the uniformity of the PEO coating. On the other hand, fluoride ions caused significant loss of coating material during coating growth. Irrespective of the fluoride addition, the coatings contained Mg3(PO4)2, amorphous material and possibly MgO. However, fluoride strongly affected the rate of coating growth and the morphology of the coating. The loss of coating material is suggested to be due to the effects of fluoride ions on the intensity of the discharges and melting of the coating.

Keywords

Magnesium alloy, Plasma electrolytic oxidation, Fluoride, Corrosion

RIV year

2013

Released

29.06.2013

Pages from

827

Pages to

838

Pages count

12

Documents

BibTex


@article{BUT102631,
  author="Aneta {Němcová} and Peter {Skeldon} and George {Thompson} and Bohumil {Pacal}",
  title="Effect of fluoride on plasma electrolytic oxidation of AZ61 magnesium alloy",
  annote="Plasma electrolytic oxidation has been carried out on AZ61 magnesium alloy in a silicate–phosphate electrolyte
under pulsed current conditions. It is shown that the addition of fluoride to the electrolyte reduced localized
corrosion that occurred near Al–Mn intermetallic particles before sparking begins. Such corrosion
affected the uniformity of the PEO coating. On the other hand, fluoride ions caused significant loss of coating
material during coating growth. Irrespective of the fluoride addition, the coatings contained Mg3(PO4)2,
amorphous material and possibly MgO. However, fluoride strongly affected the rate of coating growth and
the morphology of the coating. The loss of coating material is suggested to be due to the effects of fluoride
ions on the intensity of the discharges and melting of the coating.",
  chapter="102631",
  number="232",
  volume="2013",
  year="2013",
  month="june",
  pages="827--838",
  type="journal article - other"
}