Corrosion resistance of Mg(OH)2/Mg-Al layered double hydroxide composite film formed directly on combustion-resistant magnesium alloy AMCa602 by steam coating

Takahiro Ishizaki, Naosumi Kamiyama, Kouhei Watanabe, Ai Serizawa

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

Films of the Mg(OH)2/Mg-Al layered double hydroxide composite were formed on the combustion-resistant magnesium alloy AMCa602 by steam coating and characterized by X-ray diffraction, Fourier-transform infrared spectroscopy, and scanning electron microscopy. The corrosion-resistance performances of the films in a 5wt% NaCl solution were investigated using electrochemical measurements. The corrosion current density of the sample that was steam-coated at 433K for 6h using the aqueous solution containing 200mM Al(NO3)3 decreased significantly more than that of the bare AMCa602. The correlations between the Mg-Al LDH content in the films, Al(NO3)3 concentration in the aqueous solutions, and corrosion current densities were investigated.

Original languageEnglish
Pages (from-to)76-84
Number of pages9
JournalCorrosion Science
Volume92
DOIs
Publication statusPublished - 2015 Mar 1

Keywords

  • A. Magnesium
  • B. Polarization
  • B. SEM
  • B. XRD
  • C. Passive films

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

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