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首页> 外文期刊>Surface Engineering >Alleviating detrimental effects of defects on corrosion performance of TiN coating by post-deposition treatment using polymethyl methacrylate
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Alleviating detrimental effects of defects on corrosion performance of TiN coating by post-deposition treatment using polymethyl methacrylate

机译：通过聚甲基丙烯酸甲酯的后沉积处理减轻缺陷对TiN涂层腐蚀性能的不利影响

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摘要

Coating defects provide an access channel for corrosive medium to penetrate and reach underlying metal substrate, therefore promoting localised corrosion. In this paper, a polymethyl methacrylate (PMMA) sealing technique was developed and applied to a TiN coating deposited by plasma assisted electron beam evaporation method. The as deposited and PMMA treated coating specimens were subjected to potentiodynamic polarisation measurements in 3˙5%NaCl aqueous solution. The coating degradation with immersion time was evaluated at open circuit potential using electrochemical impedance technique. The test results indicate that PMMA postdeposition treatment successfully seals the pores, and therefore significantly improves the corrosion resistance of the coating. Additionally no obvious degradation has been observed for the PMMA treated samples during the long time exposure to the NaCl solution.
机译：涂层缺陷为腐蚀性介质提供了进入通道，以渗透并到达下面的金属基材，从而促进局部腐蚀。本文开发了一种聚甲基丙烯酸甲酯（PMMA）密封技术，并将其应用于通过等离子体辅助电子束蒸发法沉积的TiN涂层。沉积的和经PMMA处理的涂层样品在35％的NaCl水溶液中进行电位动力学极化测量。使用电化学阻抗技术在开路电势下评估涂层随浸入时间的降解。测试结果表明，PMMA后沉积处理成功地密封了孔，因此显着提高了涂层的耐腐蚀性。另外，在长时间暴露于NaCl溶液中，未观察到PMMA处理的样品的明显降解。

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