Brune D, Hultquist G, Leygraf C
Scand J Dent Res. 1984 Jun;92(3):262-7. doi: 10.1111/j.1600-0722.1984.tb00890.x.
The release of cobalt and chromium from a passivated and non-passivated cobalt-chromium alloy in artificial saliva has been measured using nuclear tracer technique. The corrosion resistance of the passivated specimens was improved by a factor of about four compared to the non-passivated specimens with regard to the initial cobalt release. The specimens were exposed to the saline solutions for periods up to about 8 wk. The cobalt release is associated mainly with electrochemical corrosion processes, since particulate matter retained on a filter was only registered to a minor extent. It is suggested that the decrease in release of cobalt and chromium after passivation is connected to the formation of Cr-O and/or Cr-OH bonds in the protective film which impede the movement of cobalt and chromium from the alloy into the saliva.
使用核示踪技术测量了钝化和未钝化的钴铬合金在人工唾液中钴和铬的释放情况。在初始钴释放方面，钝化试样的耐腐蚀性相比未钝化试样提高了约四倍。将试样暴露于盐溶液中长达约8周。钴的释放主要与电化学腐蚀过程有关，因为过滤后保留的颗粒物仅在很小程度上被记录到。有人认为，钝化后钴和铬释放量的减少与保护膜中Cr-O和/或Cr-OH键的形成有关，这些键阻碍了钴和铬从合金中迁移到唾液中。
