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Corrosion resistance of CrN thin films produced by dc magnetron sputtering

机译：直流磁控溅射制备的CrN薄膜的耐蚀性

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摘要

In this study, the electrochemical behavior of chromium nitride (CrN) coatings deposited on two steel substrates, A1SI 304 and AISI 1440, was investigated. The CrN coatings were prepared using a reactive d.c. magnetron sputtering deposition technique at two different pressures (P1= 0.4 Pa and P2 = 4 Pa) with a mixture of N_2-Ar (1.5-10). The microstructure and crystallinity of the CrN coatings were investigated using X-ray diffraction. The aqueous corrosion behavior of the coatings was evaluated using two methods. The polarization resistance (Tafel curves) and electrochemical impedance spectra (EIS) in a saline (3.5% NaCl solution) environment were measured in terms of the open-circuit potentials and polarization resistance (R_p). The results indicated that the CrN coatings present better corrosion resistance and R_p values than do the uncoated steel substrates, especially for the coatings produced on the AISI 304 substrates, which exhibited a strong enhancement in the corrosion resistance. Furthermore, better behavior was observed for the coatings produced at lower pressures (0.4 Pa) than those grown at 4 Pa.
机译：在这项研究中，研究了在两种钢质基材A1SI 304和AISI 1440上沉积的氮化铬（CrN）涂层的电化学行为。 CrN涂层是使用反应性直流电制备的。磁控溅射沉积技术在两种不同压力（P1 = 0.4 Pa和P2 = 4 Pa）下混合使用N_2-Ar（1.5-10）。使用X射线衍射研究CrN涂层的微观结构和结晶度。使用两种方法评估了涂层的水腐蚀行为。根据开路电势和极化电阻（R_p）测量了在盐水（3.5％NaCl溶液）环境中的极化电阻（Tafel曲线）和电化学阻抗谱（EIS）。结果表明，CrN涂层比未涂层的钢基材具有更好的耐腐蚀性和R_p值，特别是对于在AISI 304基材上生产的涂层，该涂层表现出很强的耐腐蚀性。此外，在较低压力（0.4 Pa）下生产的涂层比在4 Pa下生长的涂层观察到更好的性能。

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  • 来源
    《Applied Surface Science》 |2013年第1期|150-156|共7页
  • 作者

    A. Ruden; E. Restrepo-Parra; A.U. Paladines; F. Sequeda;

  • 作者单位

    Laboratorio de Fisica del Plasma, Universidad Nacional de Colombia Sede Manizales, Km. 9 via al Magdalena, Manizales, Colombia,Laboratorio de Recubrimientos Duros y Aplicaciones Industriales-RDAI, Universidad del Valle, Calle 13 N° 100-00 Ciudadela Melendez, Cali, Colombia,Departamento de matematicas, Universidad Tecnologica de Pereira, Pereira, Colombia;

    Laboratorio de Fisica del Plasma, Universidad Nacional de Colombia Sede Manizales, Km. 9 via al Magdalena, Manizales, Colombia;

    Laboratorio de Recubrimientos Duros y Aplicaciones Industriales-RDAI, Universidad del Valle, Calle 13 N° 100-00 Ciudadela Melendez, Cali, Colombia;

    Laboratorio de Recubrimientos Duros y Aplicaciones Industriales-RDAI, Universidad del Valle, Calle 13 N° 100-00 Ciudadela Melendez, Cali, Colombia;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    corrosion; EIS; pressure; tafel curves; XRD;

    机译：腐蚀;EIS;压力;塔菲尔曲线;XRD;

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