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EIS study of Ti-23Ta alloy in artificial saliva

机译：人工唾液中Ti-23Ta合金的EIS研究

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摘要

Although titanium and Ti-6Al-4V alloy have been widely used as dental materials, possible undesirable effects such as cytotoxic reactions and neurological disorder due to metal release led to the development of more corrosion resistant and V and Al free titanium alloys, containing Nb, Zr, Mo and Ta atoxic elements. Fluoride containing products used in the prevention of plaque formation and dental caries can affect the stability of the passive oxide films formed on the Ti alloys. In this work, the corrosion behaviour of the new Ti-23Ta alloy has been evaluated in artificial saliva of different pH and fluoride concentration using electrochemical impedance spectroscopy. Electrochemical impedance spectroscopy study showed that the oxide film formed on the alloy in artificial saliva consists of an inner compact film and an outer porous layer. The corrosion resistance of Ti-23Ta alloy which is reduced by increasing F concentration or decreasing pH is related to the resistance of the inner compact layer. The presence of fluoride and low pH of the saliva enhance the porosity of the oxide film and its dissolution.
机译：尽管钛和Ti-6Al-4V合金已被广泛用作牙科材料，但由于金属释放而可能产生的不良影响，例如细胞毒性反应和神经系统疾病，导致了更耐腐蚀的含Nb，V和Al游离的钛合金的发展。 Zr，Mo和Ta无毒元素。用于防止牙菌斑形成和龋齿的含氟产品会影响在Ti合金上形成的钝化氧化膜的稳定性。在这项工作中，已经使用电化学阻抗谱法评估了新的Ti-23Ta合金在不同pH和氟化物浓度的人工唾液中的腐蚀行为。电化学阻抗谱研究表明，人工唾液中合金上形成的氧化膜由内部致密膜和外部多孔层组成。通过增加F浓度或降低pH值而降低的Ti-23Ta合金的耐蚀性与内部致密层的耐性有关。氟化物的存在和唾液的低pH值会增强氧化膜的多孔性及其溶解。

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    《Corrosion Engineering, Science and Technology》 |2009年第5期|352-357|共6页
  • 作者

    Robin A.; Meirelis J.P.;

  • 作者单位

    Departamento de Engenharia de Materiais, Escola de Engenharia de Lorena, Universidade de S?o Paulo, Estrada Municipal do Campinho, CEP 12·601-810, Lorena, S?o Paulo, Brazil, Email: alain@demar.eel.usp.br;

    Departamento de Engenharia de Materiais, Escola de Engenharia de Lorena, Universidade de S?o Paulo, Estrada Municipal do Campinho, CEP 12·601-810, Lorena, S?o Paulo, Brazil;

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