Corrosion behavior of flame-resistant Calcium-added Magnesium alloy in NaCl aqueous solution containing various anion species

Mika Tsunakawa, Ryota Shiratori, Kae Nakamura, Takahiro Ishizaki

研究成果: Paper

抜粋

Flame-resistant Ca-added Mg alloys are highly desirable as the materials for transport industry from viewpoints of the safety and lightweight. Recently, exposure tests of the Ca-added Mg alloys demonstrated that the anion species other than chloride ion, such as nitrate and sulfate ions, were present in the corrosion products formed on the Mg alloys. However, details of the corrosion behavior of the Ca-added Mg alloys have been not yet clarified. In this study, we aimed to investigate the corrosion behavior of the flame-resistant Ca-added Mg alloy in NaCl aqueous solution with and without sulfate ions by immersion testing. XRD and FT-IR measurements demonstrated that the corrosion products formed on the Ca-added Mg alloy AZX612 were composed of Mg(OH)2, MgCO3, and Mg-Al layered double hydroxide (LDH). Immersion tests in the corrosive solution revealed that the addition of SO42- to NaCl promoted the formation of the of Mg(OH)2. The dense layer of Mg(OH)2 served as an protective film towards corrosive NaCl solution, thus resulted in decreasing the corrosion rate of the flame-resistant Ca-added Mg alloy.

元の言語English
ページ1559-1565
ページ数7
出版物ステータスPublished - 2016 1 1
イベントEuropean Corrosion Congress, EUROCORR 2016 - Montpellier, France
継続期間: 2016 9 112016 9 15

Conference

ConferenceEuropean Corrosion Congress, EUROCORR 2016
France
Montpellier
期間16/9/1116/9/15

ASJC Scopus subject areas

  • Materials Science(all)
  • Industrial and Manufacturing Engineering
  • Surfaces and Interfaces
  • Colloid and Surface Chemistry

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  • これを引用

    Tsunakawa, M., Shiratori, R., Nakamura, K., & Ishizaki, T. (2016). Corrosion behavior of flame-resistant Calcium-added Magnesium alloy in NaCl aqueous solution containing various anion species. 1559-1565. 論文発表場所 European Corrosion Congress, EUROCORR 2016, Montpellier, France.