Development of dental titanium alloys with high corrosion resistance in fluoride environment

氟环境高耐蚀牙科钛合金的研制

• 批准号: 12671892
• 负责人: NAKAGAWA Masaharu
• 金额: $ 2.24万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12671892/
• 关键词: Titanium; Titanium alloy; Corrosion; Fluoride; Implant; Dissolved Oxygen

The effects of dissolved-oxygen concentration and fluoride concentration on the corrosion behaviors of commercial pure titanium (Ti), Ti-6A1-4V and Ti 6A1-7Nb alloys and experimentally produced Ti-0.2Pd and Ti-0.5Pt alloys were examined by the corrosion potential measurements, dissolved Ti analyses and surface analyses of the specimen. Pure Ti, Ti-6A1-4V and Ti-6A1-7Nb alloys were easily corroded even in a low fluoride concentration in an acidic environment. The corrosion resistance of Ti-0.2Pd and Ti-0.5Pt alloys were greater than those of pure Ti, Ti-6A1-4V and Ti-6A1-7Nb alloys in the wide range of pH and fluoride concentrations. The high corrosion resistance of Ti- 0.2Pd and Ti-0.5Pt alloys were caused by the surface enrichment of Pd or Pt promoting a repassivation of Ti.Decrease in the dissolved-oxygen concentration tended to have reduced the corrosion resistance of Ti and Ti alloys. Under the low, dissolved-oxygen environment, the corrosion of pure Ti and Ti-6A1-4V and Ti-6A1-7Nb alloys might easily take place in the presence of small amount of fluoride. They were corroded by the half or less fluoride concentration in commercial dentifrices (1OOOppmF). The Ti-0.2Pd and Ti-0.5Pt alloys did not corrode even under the low dissolved-oxygen concentration and fluoride-containing environment. These alloys are expected to be useful as new Ti alloys with high corrosion resistance in dental use.

溶解氧浓度和氟化物浓度对商业纯钛（TI），TI-6A1-4V和Ti 6A1-7NB合金的腐蚀行为的影响，并通过实验产生的TI-0.2PD和TI-0.5PT合金。腐蚀电位测量，溶解的TI分析和样品的表面分析。纯Ti，Ti-6a1-4v和Ti-6a1-7nb合金即使在酸性环境中氟化物浓度低，也很容易腐蚀。 TI-0.2PD和TI-0.5PT合金的耐耐性大于纯TI，TI-6A1-4V和TI-6A1-7NB合金的耐腐蚀性，pH和氟化物浓度范围很大。 TI-0.2pd和Ti-0.5pt合金的高腐蚀性是由PD或PT的表面富集引起的，促进了Ti.Decrease的溶解 - 氧气浓度的重新溶质，往往会降低Ti和Ti Alloys的腐蚀性。在低溶解的氧气环境下，在少量的氟化物存在下，纯Ti和Ti-6A1-4V和TI-6A1-7NB合金的腐蚀很容易发生。它们被商业牙齿（1OOOPPMF）中氟化物浓度的一半腐蚀。即使在低溶解氧浓度和含氟化物的环境下，TI-0.2PD和TI-0.5PT合金也不会腐蚀。预计这些合金将是有用的，因为新的Ti合金在牙齿使用中具有较高的耐腐蚀性。

项目成果

Masaharu NAKAGAWA et al.: "Corrosion Behavior of Pure Titanium and Titanium Alloys in Fluoride-containing Solutions"DENTA L MATERIALS JOURNAL. Vol. 20, No. 4. 305-314 (2001)

Masaharu NAKAGAWA 等：“纯钛和钛合金在含氟溶液中的腐蚀行为”DENTA L MATERIALS JOURNAL。

Nobuhiro TSUJI, Michiaki SADAOKA, Kuniko ISHIBASHI, Masaharu NAKAGAWA et al.: "The Study of Color Change and Corrosion of Ag-Pd-Cu-Au Alloy"Journal of Esthetic Dentistry. Vol. 13, No. 2. 264-270 (2001)

Nobuhiro Tsuji、Michiaki SADAOKA、Kuniko ISHIBASHI、Masaharu NAKAGAWA 等：“Ag-Pd-Cu-Au 合金的颜色变化和腐蚀研究”美容牙科杂志。

Masaharu NAKAGAWA 他: "Corrosion Behavior of Pure Titanium and Titanium Alloys in Fluoride-containing Solutions"DENTAL MATERIALS JOURNAL. Vol.20 No.4. 305-314 (2001)

Masaharu NAKAGAWA 等人：“纯钛和钛合金在含氟化物溶液中的腐蚀行为”《牙科材料杂志》第 20 卷第 305-314 期（2001 年）。

辻 展弘, 貞岡岐信, 石橋邦子, 中川雅晴 他: "歯科用金銀パラジウム合金の変色と腐食"歯科審美. 13巻・2号. 264-270 (2001)

Nobuhiro Tsuji、Kishin Sadaoka、Kuniko Ishibashi、Masaharu Nakakawa 等：“牙科金银钯合金的变色和腐蚀”《牙科美学》第 13 卷，第 2 期。264-270 (2001)