Vを含まない生体用Ti合金の耐食性に及ぼすMoとPdの効果

• 岡崎 義光

  通産省工業技術院機械技術研究所

• 許 健司

  日本工業大学

• 伊藤 喜昌

  株式会社神戸製鋼所技術開発本部

• 立石 哲也

  通産省工業技術院機械技術研究所

書誌事項

タイトル別名

• Effect of Mo and Pd on Corrosion Resistance of V-free Titanium Alloys for Medical Implants
• V オ フクマナイ セイタイヨウ Ti ゴウキン ノ タイショクセイ ニ オヨ

抄録

The corrosion resistances of Ti-15%Zr-4%Nb-4%Ta-0.2%Pd-0.2%O-0.05%N and Ti-15%Sn-4%Nb-2%Ta-0.2%Pd-0.2%O alloys were compared with pure Ti grade 2, Ti-6%Al-4%V ELI (Extra low interstitial), Ti-6%Al-2%Nb-1%Ta and β type Ti-15%Mo-5%Zr-3%Al alloys for medical implants by anodic polarization and immersion tests at 310 K in various pseudo saline solutions.<BR>The change in current density was small up to passivity zones in 1% lactic acid, PBS(−), calf serum and eagle’s MEM+bovine serum solutions except 5%HCl. The current density change of Ti-15%Zr-4%Nb-4%Ta-0.2%Pd-0.2%O-0.05%N alloy was lowest among the whole Ti alloys. Current density at higher voltage region more than 2 volt tend to be higher in the following relation; Ti-6%Al-4%V ELI>Pure Ti grade 2>Ti-6%Al-2%Nb-1%Ta>Ti-15%Sn-4%Nb-2%Ta-0.2%Pd-0.2%O>Ti-15%Zr-4%Nb-4%Ta-0.2%Pd-0.2%O-0.05%N alloy in α+β type alloys. Otherwise the passive current density of the β type Ti-15%Mo-5%Zr-3%Al alloy was higher than that of α+β type alloys. Passive films formed on Ti-15%Mo-5%Zr-3%Al alloy in the calf serum consisted mainly of TiO₂, ZrO₂, Al₂O₃ and Mo as demonstrated by X-ray photoelectron spectroscopy (XPS).<BR>The rate of Ti ion released from Ti alloys in a deaerated 5%HCl solution decreased with increasing Zr, Nb, Ta, and Pd contents. Especially, the rate of Ti ion released from Ti-15%Zr-4%Nb-(2∼4%)Ta-Pd alloys containing Pd in the range from 0 to 0.2% decreased remarkably compared to 0.2 to 0.5%Pd. The passive films formed on the Ti-Zr-Nb-Ta-Pd and Ti-Sn-Nb-Ta-Pd alloys containing 0.2%Pd in the immersion test consist mainly of TiO₂, ZrO₂, SnO₂, Sn, Nb₂O₅, Ta₂O₅ and Pd or PdO. The rate of released Ti increased by the following relation; Ti-15%Sn-4%Nb-2%Ta-0.2%Pd-0.2%O≥Ti-6%Al-2%Nb-1%Ta≥Ti-6%Al-4%V ELI≥Pure Ti grade 2>Ti-15%Zr-4%Nb-4%Ta-0.2%Pd-0.2%O-0.05%N≥β type Ti-15%Mo-5%Zr-3%Al alloy.

収録刊行物

• 日本金属学会誌

  日本金属学会誌 59 (10), 1061-1069, 1995

  公益社団法人 日本金属学会

キーワード

• titanium alloy
• medical implant
• corrosion resistance
• pseudo saline solution
• anodic polarization curve
• immersion test
• X-ray photoelectron spectroscopy
• effect of alloying element

詳細情報

• CRID: 1390282681468201216
• NII論文ID: 130007342081
• NII論文ID: 10003509546
• NII論文ID: 10001671565
• NII書誌ID: AN00187860
• DOI: 10.2320/jinstmet1952.59.10_1061
• ISSN: 18806880
• ISSN: 24337501
• ISSN: 00214876
• ISSN: http://id.crossref.org/issn/00214876
• ISSN: http://id.crossref.org/issn/00214426
• NDL書誌ID: 3641788
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3641788
• Web Site: https://www.jstage.jst.go.jp/article/jinstmet1952/59/10/59_10_1061/_pdf
• データソース種別:
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  • NDL
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• 抄録ライセンスフラグ: 使用不可