Lun-ye Sun, Nuo Chen, Yong-gang Hou, Biao Chen, Qing-hong Zhou, Song Shi
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引用次数: 0
摘要
Ti6A14V合金表面电火花线切割加工（WEDM）产生重铸层和微裂纹，严重影响零件的强度和耐腐蚀性。电化学抛光因其成本低、效率高而广泛应用于金属表面处理。为了解决电火花线切割加工后的表面质量问题，本文对加工后的Ti6Al4V合金进行了电化学抛光，研究了不同乙醇/乙二醇配比的抛光溶液和表面耐腐蚀性。在此基础上，分析了电流密度对电火花线切割加工零件表面粗糙度、形貌和耐蚀性的影响。通过优化乙醇/乙醇比和电流密度，在乙醇/乙醇比为4:1、电流密度为0.55 a cm−2的条件下，获得了微米尺寸的无杂质Ti6Al4V表面，表面粗糙度（Ra）从3.69降低到0.40 μm。微裂纹和重铸层完全去除，腐蚀电流密度降低1个数量级，耐蚀性显著提高，达到0.49±0.04µA cm−2。
Optimization of ethanol/ethylene glycol ratio and current density for electrochemical polishing of Ti6Al4V alloy with recast layer
Wire electrical discharge machining (WEDM) of the Ti6A14V alloy surface generates a recast layer and microcracks, which seriously affects the strength and corrosion resistance of the parts. Electrochemical polishing is widely used in metal surface finishing due to its low cost and high efficiency. To solve the problem of surface quality after WEDM machining, in this paper, electrochemical polishing of Ti6Al4V alloy after machining is investigated for different ethanol/glycol ratios of polishing solution and surface corrosion resistance. Based on this study, the effect of current density on the surface roughness, morphology, and corrosion resistance of WEDM-machined parts was also analyzed. By optimizing the ethanol/glycol ratio and current density, a micron-sized impurity-free Ti6Al4V surface was obtained at a glycol/ethanol ratio of 4:1 and a current density of 0.55 A cm−2, and the surface roughness (Ra) was reduced from 3.69 to 0.40 μm. The microcracks and recast layer were completely removed, the corrosion current density was reduced by one order of magnitude, and the corrosion resistance was significantly improved, which amounted to 0.49 ± 0.04 µA cm−2.
期刊介绍：
The Journal of Solid State Electrochemistry is devoted to all aspects of solid-state chemistry and solid-state physics in electrochemistry.
The Journal of Solid State Electrochemistry publishes papers on all aspects of electrochemistry of solid compounds, including experimental and theoretical, basic and applied work. It equally publishes papers on the thermodynamics and kinetics of electrochemical reactions if at least one actively participating phase is solid. Also of interest are articles on the transport of ions and electrons in solids whenever these processes are relevant to electrochemical reactions and on the use of solid-state electrochemical reactions in the analysis of solids and their surfaces.
The journal covers solid-state electrochemistry and focusses on the following fields: mechanisms of solid-state electrochemical reactions, semiconductor electrochemistry, electrochemical batteries, accumulators and fuel cells, electrochemical mineral leaching, galvanic metal plating, electrochemical potential memory devices, solid-state electrochemical sensors, ion and electron transport in solid materials and polymers, electrocatalysis, photoelectrochemistry, corrosion of solid materials, solid-state electroanalysis, electrochemical machining of materials, electrochromism and electrochromic devices, new electrochemical solid-state synthesis.
The Journal of Solid State Electrochemistry makes the professional in research and industry aware of this swift progress and its importance for future developments and success in the above-mentioned fields.
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