Surface engineering of Ti6Al4V surfaces for enhanced tribocorrosion performance in artificial seawater
Surface engineering of Ti6Al4V surfaces for enhanced tribocorrosion performance in artificial seawater
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DOI：
10.1016/j.matdes.2016.04.080
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发表时间：
2016-08-15
影响因子：
8.4
通讯作者：
Ripoll, Manel Rodriguez
中科院分区：
文献类型：
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作者：
Totolin, Vladimir;Pejakovic, Vladimir;Ripoll, Manel Rodriguez
钛及其合金是具有优良耐蚀性能的材料，但在滑动接触条件下表现出较差的磨损和摩擦性能。因此，本研究的目的是找到合适的表面处理钛合金基板在盐水环境条件下使用。各种表面工程技术已被应用到Ti6Al4V基板，并使用动电位调查这些表面处理在人工海水的存在下的静态腐蚀性能进行了评估。此外，结合滑动腐蚀性能进行了研究，使用耦合到一个电化学池的微摩擦。使用这种设置，对选定的样品进行测试，以检查磨损和腐蚀的协同效应，也称为摩擦腐蚀。结果清楚地揭示了未处理的Ti6Al4V基材的摩擦学性能差，因此突出了表面处理的需要。此外，有人强调，一些比较的表面工程处理应用到Ti6Al4V虽然表现出改善的耐腐蚀性在静态条件下，它们显示出根本不同的行为下摩擦腐蚀。讨论了导致不同摩擦腐蚀性能的根本原因，并揭示了磨损和腐蚀联合作用下表面退化的主要机制。(C)2016爱思唯尔有限公司版权所有
Titanium and its alloys are materials with excellent corrosion resistant properties, but under sliding contact exhibit poor wear and friction performance. Therefore, the aim of this study was to find suitable surface treatments for titanium alloy substrates to be used under saline environmental conditions. Various surface engineering techniques have been applied to Ti6Al4V substrates, and the static corrosion performance of these surface treatments in presence of artificial seawater was evaluated using potentiodynamic investigations. Furthermore, the combined sliding-corrosion performance was investigated using a micro-tribometer coupled to an electrochemical cell. Using this set-up, the selected samples were tested in order to check the synergistic effect of wear and corrosion, also known as tribocorrosion. The results clearly revealed a poor tribological performance of the untreated Ti6Al4V substrate, thus highlighting the need for surface treatments. Furthermore, it was highlighted that some of the compared surface engineering treatments applied to Ti6Al4V although exhibited improved corrosion resistance under static conditions, they showed a radically different behaviour under tribocorrosion. The underlying reasons leading to a different tribocorrosion performance are discussed and the main mechanisms associated with surface degradation under combined wear and corrosion are revealed. (C) 2016 Elsevier Ltd. All rights reserved.