| 王珏,乔广艳,孙皎.过氧化氢对银汞合金电化学腐蚀性能的实验研究[J].口腔材料器械杂志,2012,21(2):65-69. |
| 过氧化氢对银汞合金电化学腐蚀性能的实验研究 |
| Effect of hydrogen peroxide on the corrosion behavior of amalgams |
| 投稿时间：2012-02-06 修订日期：2012-03-06 |
| DOI：10.11752/j.kqcl.2012.02.02 |
| 中文关键词: 过氧化氢 牙科银汞合金 电化学腐蚀 |
| 英文关键词:Hydrogen peroxide (H2O2) Dental amalgams Corrosion resistance |
| 基金项目:上海市重点学科建设项目(编号:S30206);上海市卫生局青年科研项目(编号:20114Y053) |
|
| 摘要点击次数: 1039 |
| 全文下载次数: 0 |
| 中文摘要: |
| 目的：研究不同浓度过氧化氢对银汞合金电化学腐蚀性能的影响。方法： 采用电化学工作站的开路电位、电化学阻抗谱及动电位极化曲线法对不同浓度过氧化氢(0%、3.6%、10%及30%)浸泡24h后的牙科银汞合金在人工唾液中的腐蚀行为进行比较。结果： 10%和30%过氧化氢浸泡后的银汞合金在人工唾液中开路电位较快地达到了一个稳定的值,且开路电位较短时间变化范围大小顺序为0%组<3.6%组<10%组<30%组;不同浓度过氧化氢浸泡后的银汞合金在人工唾液中的等效电路极化电阻大小顺序为:0%组>3.6%组>10%组>30%组,与动电位极化曲线腐蚀电位(Ecorr)结果一致;而自腐蚀电流密度(Icorr)结果为:0%组<3.6%组<10%组<30%组。结论： 随着过氧化氢浓度的升高,银汞合金在人工唾液中的耐腐蚀性能越来越差。 |
| 英文摘要: |
| Objective: To study the effect of different concentrations of hydrogen peroxide (H2O2) on electrochemical corrosion of amalgams. Methods: The corrosion resistance of dental amalgams was evaluated by open circuit potential,potentiodynamic polarization curves and electrochemical impedance spectroscopy measurements in artificial saliva after being immersed in different concentrations of H2O2 (0%,3.6%,10% and 30%) for 24h. Results: The open circuit potential of amalgams in artificial saliva after being immersed in 10%，30% H2O2 quickly reached to a stable value,and the change order of the open circuit potential in a short time in artificial saliva was 0%<3.6%<10%<30%. It was also found that the sequence of polarization resistance in equivalent circuit of amalgams was 0%>3.6%>10%>30%. And it was consisted with the sequence of corrosion potential (Ecorr) of potentiodynamic polarization curves,the sequence of corrosion current density (Icorr) was 0%<3.6%<10%<30%. Conclusions: The corrosion resistance of amalgams in artificial saliva after being immersed was reduced with the increase of H2O2 concentration. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |