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首页> 外文期刊>Journal of Materials Engineering and Performance >Corrosion-Erosion Effect on TiN/TiAlN Multilayers
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Corrosion-Erosion Effect on TiN/TiAlN Multilayers

机译：对TiN / TiAlN多层膜的腐蚀作用

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The goal of this work is to study electrochemical behavior under corrosion-erosion conditions for [TiN/TiAlN] n multilayer coatings with bilayer number (n) of 2, 6, 12, and 24 and/or bilayer period (Λ) of 1500, 500, 250, 150, and 125 nm deposited by a magnetron sputtering technique on Si (100) and AISI 1045 steel substrates. The Ti-N and Ti-Al-N structures for multilayer coatings were evaluated via x-ray diffraction analysis. Silica particles were used as the abrasive material in corrosion-erosion tests within the 0.5 M H2SO4 solution at impact angles of 30° and 90° over the surface. The electrochemical characterization was carried out using the polarization resistance technique (Tafel) to observe changes in corrosion rates as a function of the bilayer number (n) or bilayer period (Λ) and impact angle. Corrosion rate values of 359 mpy of uncoated steel substrate and 103 mpy for substrate coated with n = 24 (Λ = 125 nm) under an impact angle of 30° were found. On the other hand, with an impact angle of 90° the corrosion rate exhibited 646 mpy on uncoated steel substrate and 210 mpy for substrate coated with n = 24 (Λ = 125 nm). This behavior was related to the curves of mass loss for both coated samples and the surface damage was analyzed via SEM images for the two different impact angles. These results indicate that TiN/TiAlN multilayer coatings deposited on AISI 1045 steel are a practical solution for applications in erosive-corrosive environments.
机译：这项工作的目的是研究[TiN / TiAlN] n 多层涂层的腐蚀-腐蚀条件下的电化学行为，该涂层的双层数（n）为2、6、12和24和/或双层周期（Λ通过磁控溅射技术在Si（100）和AISI 1045钢基底上沉积1500、500、250、150和125 nm的）。通过X射线衍射分析评估了多层涂层的Ti-N和Ti-Al-N结构。在0.5 M H2 SO4 溶液中，以30°和90°的冲击角对表面进行腐蚀-腐蚀试验时，将二氧化硅颗粒用作磨料。使用极化电阻技术（Tafel）进行电化学表征，观察腐蚀速率随双层数（n）或双层周期（Λ）和冲击角的变化。发现在30°的冲击角下，未涂层的钢基材的腐蚀速率值为359 mpy，对于n = 24（Λ= 125 nm）的基材，腐蚀速率为103 mpy。另一方面，在90°的冲击角下，腐蚀速率在未涂覆的钢基材上显示为646 mpy，对于涂覆n = 24（Λ= 125 nm）的基材显示为210 mpy。该行为与两个涂覆样品的质量损失曲线有关，并且通过SEM图像针对两个不同的冲击角分析了表面损伤。这些结果表明，在AISI 1045钢上沉积的TiN / TiAlN多层涂层是适用于腐蚀性腐蚀环境的实用解决方案。

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