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Corelation between crystalline phase and corrosion resistance of Mg alloy with different PEO conditions. II. Corrosion resistance

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2018, 28(2), pp.80-84
  • DOI : 10.6111/JKCGCT.2018.28.2.080
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering
  • Published : April 30, 2018

Bae-Yeon Kim 1 Yongnam Kim 2 Minseok Jeon 2 Jae-Ho Ham 3

1인천대학교
2한국산업기술시험원
3MST Technology

Accredited

ABSTRACT

Mg alloys AZ31 and AZ91 were Plasma-Electrolytic-Oxidized in Na-P and Na-Si system electrolyte at various concentration, applied voltage and time. Thickness and surface roughness of PEO coating were examined. Salt spraying test were carried out to compare their corrosion resistances. Generally, corrosion resistances rate were increased as thickness and crystallinity increasing. Size of pore being larger, long term corrosion resistance decreased. It is turned out that Mg 2 SiO 4 and other crystalline phase rather than MgO might be increase corrosion resistance dramatically.

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