Electrochemical effects on the fretting corrosion behaviour of Ti6Al4V in 0.9% sodium chloride solution
Electrochemical effects on the fretting corrosion behaviour of Ti6Al4V in 0.9% sodium chloride solution
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DOI：
10.1016/j.wear.2004.12.012
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发表时间：
2005-07-01
期刊：
影响因子：
5
通讯作者：
Landolt, D
中科院分区：
文献类型：
--
作者：
Barril, S;Mischler, S;Landolt, D
研究了一种Ti6Al4V合金在0.9%氯化钠溶液中与氧化铝球接触的微动腐蚀行为。试验是在装有电化学电池的微动试验台上进行的。在振幅为50 pm和100 pm的微运动中，评估了外加电位和振荡频率的影响。使用扫描电子显微镜（SEM）和俄歇电子能谱（AES）技术对磨损表面进行表征。使用第三体和耗散能量方法解释结果。磨损程度受到外加电位的深刻影响，特别是对于高于约-0.2 V Ag/AgCl的电位。这种效应与在较高阳极电位下由金属塑性变形形成的第三体的氧化增加有关。另一方面，当施加阳极电位时，磨损所需的机械能急剧下降。(c) 2004 Elsevier B.V.版权所有
The fretting corrosion behaviour of a Ti6Al4V alloy in contact with an alumina ball was investigated in a 0.9% sodium chloride solution. The tests were carried out using a fretting test rig equipped with an electrochemical cell. The effects of applied potential and oscillation frequency were evaluated for micro-motions of 50 and 100 pm amplitude. Scanning electron microscopy (SEM) and Auger electron spectroscopy (AES) techniques were used to characterise the worn surfaces. Results were interpreted using the third body and the dissipated energy approaches. The extent of wear was profoundly affected by the applied potential, especially for potentials above approximately -0.2 V Ag/AgCl. This effect was related to the increasing oxidation of the third body formed by plastic deformation of the metal found at higher anodic potentials. On the other hand, the mechanical energy necessary for wear was found to be dramatically decreased when anodic potentials are applied. (c) 2004 Elsevier B.V. All rights reserved.