Johansson B I, Bergman B
Department of Dental Materials Science, Faculty of Odontology, Umeå University, Sweden.
Dent Mater. 1995 Jan;11(1):41-6. doi: 10.1016/0109-5641(95)80007-7.
The aim of this investigation was to study the effect of surface treatments and electrode area size on the corrosion of cast and machined titanium in contact with conventional and high-copper amalgams in saline solutions with and without added fluoride ions.
The potentials and the charges transferred between amalgam and titanium couples were registered using standard electrochemical methods.
Conventional amalgam corroded more than high-copper amalgams in contact with titanium in saline solutions. Adding fluoride to the solution made the titanium potential more active and enhanced the corrosion of titanium in combination with high-copper amalgams. The amalgam corrosion increased with a five-fold enlargement of the titanium area. The increase was significant for one titanium-amalgam combination. Surface preparations affected the electrochemical behavior, and surface alterations were occasionally observed on wet-ground titanium specimens. No significant differences were found in comparisons of cast and lathe-cut titanium.
Surface preparations and fluoride affect the electrochemical activity of titanium.
本研究旨在探讨在添加和不添加氟离子的盐溶液中，表面处理和电极面积大小对铸造及加工钛与传统汞合金和高铜汞合金接触时腐蚀情况的影响。
采用标准电化学方法记录汞合金与钛偶之间的电位和转移电荷。
在盐溶液中，与钛接触时，传统汞合金比高铜汞合金腐蚀更严重。向溶液中添加氟会使钛的电位更具活性，并增强钛与高铜汞合金组合时的腐蚀。钛面积增大五倍时，汞合金腐蚀加剧。对于一种钛 - 汞合金组合，这种增加具有显著性。表面处理影响电化学行为，在湿磨钛试样上偶尔观察到表面变化。铸造钛和车削钛之间的比较未发现显著差异。
表面处理和氟会影响钛的电化学活性。
