Corrosion behavior of Zr65Al7.5Ni10Cu17.5 Amorphous alloy for biomedical use

S. Hiromoto, Pang Tsai An Pang Tsai, M. Sumita, T. Hanawa

    研究成果: Article査読

    35 被引用数 (Scopus)

    抄録

    To evaluate the performance of Zr65Al7.5Ni10Cu17.5 amorphous alloy for the biomedical use, the effects of chloride ion, Cl-, pH, and dissolved oxygen, DO, on the anodic polarization behavior of the alloy were examined in phosphate buffered solutions. Polarization resistance, Rp, at open-circuit potential, Eopen, and pitting potential, Epit, were determined from the polarization curve. Compositions of passive film generated in a pH-7.5 solution with various concentrations of DO were characterized with X-ray photoelectron spectroscopy. In the solution with pH 7.5, the Epit decreased with the increase in logarithm of Cl- concentration, [Cl-], and showed the highest value with the same DO concentration, [DO], as that in vivo. The concentrations of hydroxide group, [OH-], and phosphate ions, [HxPO4(3-x)-], in the passive film were changed with various [DO]s, and the Epit decreased with the increase in [OH-] and [HxPO4(3-x)-]. In the solution with pH 2.2, the Epit was higher than the Eopen with and without DO. Therefore, this alloy may be resistant to the pitting corrosion in vivo.

    本文言語English
    ページ(範囲)656-659
    ページ数4
    ジャーナルMaterials Transactions
    42
    4
    DOI
    出版ステータスPublished - 2001

    ASJC Scopus subject areas

    • 材料科学(全般)
    • 凝縮系物理学
    • 材料力学
    • 機械工学

    フィンガープリント

    「Corrosion behavior of Zr<sub>65</sub>Al<sub>7.5</sub>Ni<sub>10</sub>Cu<sub>17.5</sub> Amorphous alloy for biomedical use」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

    引用スタイル