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首页> 外文期刊>International Journal of Electrochemical Science >Diagnostic of the Erosion Corrosion Evolution by Cavitation of [TiN-TiAlN]200 Thin Coatings
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Diagnostic of the Erosion Corrosion Evolution by Cavitation of [TiN-TiAlN]200 Thin Coatings

机译：[TiN-TiAlN] 200 薄涂层空蚀对腐蚀腐蚀演变的诊断

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In this work is presented the results of the corrosion erosion resistance evaluation by cavitation of thethin films in multilayers form of TiN/TiAlN deposited with 200 bilayers period onto AISI 4140 steelsubstrates, by means of magnetron sputtering system with reactive r.f. from high purity targets of Tiand Al (99.99%) in an atmosphere composed by Ar/N. The test was performed with a high frequencygenerator and the sample immersed in a liquid containing sodium chloride. The electrochemicalcharacterization was performed using the techniques of electrochemical impedance spectroscopy andTafel polarization curves. The microstructural characterization was obtained by scanning electronmicroscopy. It was state that the coatings subjected only to the phenomena of erosion produced bycavitation generate low damages, due to the material loss is minimum. However, when the coatings aresubjected to simultaneous corrosion and erosion damage by cavitation the deterioration is high, owingto the synergy of the two evaluated mechanisms.
机译：在这项工作中，通过具有反应性r.f的磁控溅射系统，通过以200个双层周期沉积在AISI 4140钢基底上的多层TiN / TiAlN薄膜的空化，给出了耐蚀性评估的结果。由Ar / N组成的气氛中的Tiand Al（99.99％）的高纯度目标产生。用高频发生器进行测试，并将样品浸入含有氯化钠的液体中。电化学表征使用电化学阻抗谱和Tafel极化曲线技术进行。显微结构表征通过扫描电子显微镜获得。据指出，由于材料损失最小，仅经受空化产生的腐蚀现象的涂层产生的损害很小。然而，由于两种评估机制的协同作用，当涂料同时受到空化作用而遭受腐蚀和侵蚀破坏时，劣化很高。

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