Polarization Behavior of Bulk Zr-Base Amorphous Alloy Immersed in Cell Culture Medium

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Effects of amino acids and proteins on polarization behavior of Zr-base amorphous alloy were examined using Hanks’ solution, minimum essential medium (MEM), and cell culture medium (MEM+FBS) consisting with MEM and fetal bovine serum (FBS), respectively. Amorphous powder consolidated Zr<SUB>55</SUB>Al<SUB>10</SUB>Ni<SUB>10</SUB>Cu<SUB>15</SUB> alloy was cathodically and anodically polarized at the beginning of (after 1.8 ks) immersion and after a long-term (605 ks) immersion in each solution. Parameters on the anodic polarization curve; open-circuit potential (<I>E</I><SUB>open</SUB>), polarization resistance (<I>R</I><SUB>p</SUB>), and pitting potential (<I>E</I><SUB>pit</SUB>), were obtained for the examination of corrosion resistance. In the presence of amino acids and proteins, <I>R</I><SUB>p</SUB> and <I>E</I><SUB>pit</SUB> increased, indicating that resistance to both general and pitting corrosion was raised with those biomolecules. Thus, the adsorbed biomolecules probably work as a diffusion barrier to molecules and ions such as dissolved oxygen and phosphate and chloride ions. During immersion, the surface oxide film grew, leading to the increase in <I>E</I><SUB>open</SUB>, average <I>E</I><SUB>pit</SUB>, and <I>R</I><SUB>p</SUB> although the parameters showed wide variance of deviation probably caused by the defects in alloy structure. The lowest values of <I>E</I><SUB>pit</SUB> after the long-term immersion were not lower than those at the beginning of immersion, indicating that the sensitivity of defects to chloride ion was not enhanced during immersion. However, the pitting corrosion resistance decreased during immersion because the potential difference between <I>E</I><SUB>open</SUB> and <I>E</I><SUB>pit</SUB> decreased.

収録刊行物

  • Materials transactions

    Materials transactions 43(12), 3112-3117, 2002-12-01

    公益社団法人 日本金属学会

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各種コード

  • NII論文ID(NAID)
    10012329200
  • NII書誌ID(NCID)
    AA1151294X
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13459678
  • NDL 記事登録ID
    6395328
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z53-J286
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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