Burstein G T, Liu C, Souto R M
Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge CB2 3QZ, UK.
Biomaterials. 2005 Jan;26(3):245-56. doi: 10.1016/j.biomaterials.2004.02.023.
This paper describes the effect of temperature on the nucleation of corrosion pits on titanium microelectrodes in Ringer's physiological solution. The results are shown for potentials far below the pitting potential, and describe breakdown of passivity with no permanent propagation of pits. Nucleation events could be observed at all the temperatures used, although they were very rare events at 20 degrees C. The frequency of breakdown rises significantly with increase in temperature. Examples are shown of current transients due to both pit nucleation and to metastable pit propagation, the latter being rare events. Analysis shows that these events constitute a significant fraction of the passive corrosion rate of titanium.
本文描述了温度对林格氏生理溶液中钛微电极上腐蚀点形核的影响。给出了远低于点蚀电位的电位下的结果，描述了钝化膜的击穿且点蚀无永久性扩展的情况。在所有使用的温度下都能观察到形核事件，尽管在20摄氏度时这些事件非常罕见。击穿频率随温度升高而显著增加。展示了由点蚀形核和亚稳态点蚀扩展引起的电流瞬变的例子，后者是罕见事件。分析表明，这些事件在钛的均匀腐蚀速率中占很大比例。
