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首页> 外文期刊>International Journal of Electrochemical Science >Electrochemical Impedance Spectroscopy Characteristic of Ti- 6Al-4V Alloy with and Without Welding under the Different Load Model
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Electrochemical Impedance Spectroscopy Characteristic of Ti- 6Al-4V Alloy with and Without Welding under the Different Load Model

机译：不同载荷模型下有无焊接Ti-6Al-4V合金的电化学阻抗谱特性

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摘要

Electrochemical impedance spectroscopy (EIS) measurements are performed on a Ti-6Al-4V alloywith and without welding. EIS measurements are always performed simultaneously on two identicalspecimens: one stressed with a slow strain rate tensile test or a constant load test and one free of stresstest. A similar electrochemical characterization is exhibited on the alloys with and without weldingduring exposure in a LiCl-methanol solution. However, their corrosion mechanisms in the corrosionmedia are completely different. The difference in the surface states of the welded and non-welded alloyis responsible to the change of the corrosion mechanism. The welded alloy exhibit high susceptibilityto corrosion and stress corrosion cracking. The applied stress promotes the corrosion process.
机译：电化学阻抗谱（EIS）测量在带有和不带有焊接的Ti-6Al-4V合金上进行。 EIS测量始终在两个相同的试样上同时进行：一个试样采用慢应变速率拉伸试验或恒定载荷试验进行应力测试，而另一种试样进行无应力测试。在LiCl-甲醇溶液中暴露和不暴露的情况下，合金表现出相似的电化学特性。但是，它们在腐蚀介质中的腐蚀机理是完全不同的。焊接和非焊接合金表面状态的差异是腐蚀机理变化的原因。焊接合金对腐蚀和应力腐蚀开裂表现出很高的敏感性。施加的应力会促进腐蚀过程。

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