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首页> 外文期刊>Applied Surface Science >Corrosion resistance of duplex and gradient CrNx coated H13 steel
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Corrosion resistance of duplex and gradient CrNx coated H13 steel

机译：双相和梯度CrNx涂层H13钢的耐腐蚀性

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The electrochemical behavior of H13 steel coated with duplex and gradient CrNx coatings deposited by cathodic arc deposition has been studied. The substrate material was coated with CrN by cathodic arc deposition technique. Duplex layers of CrNx which normally include an interlayer approximately 100-200 nm of Cr under the main CrN coating, were prepared; gradient CrN, coating were produced with continuous elevated nitrogen pressure. The X-ray photoelectron spectroscopy (XPS) was applied to characterize the chemical composition, and the glancing angle X-ray diffraction (GAXRD) was used to examine the crystallographic structure. The potentiodynamic polarization was examined by Zahner IM6e electrochemical workstation in a 0.5 M H2SO4 solution at ambient temperature, and the corrosive surface was detected by scanning electron microscopy (SEM). It was shown that the gradient coating could enhance the corrosion performance of CrNx coated H13 steel. The corrosion resistance improvement was not only attributed to the increase in thickness, but also to the internal microstructure and phase composition. Gradient CrNx coating produced in this work was proved to be particularly promising in terms of corrosion resistance, owing to its incontinuous pinholes and different composition: Cr, Cr2N in inner part and CrN in surface. The results showed that the gradient coating had an improved electrochemical performance than duplex CrN coating. (C) 2003 Elsevier Science B.V. All rights reserved. [References: 6]
机译：研究了H13钢的电化学行为，该钢涂有通过阴极电弧沉积法沉积的双相和梯度CrNx涂层。通过阴极电弧沉积技术用CrN涂覆衬底材料。制备了通常在主CrN涂层下包括约100-200 nm的Cr中间层的CrNx双层。在连续升高的氮气压力下制备梯度CrN涂层。使用X射线光电子能谱（XPS）表征化学成分，并使用掠射角X射线衍射（GAXRD）来检查晶体结构。在环境温度下，通过Zahner IM6e电化学工作站在0.5 M H2SO4溶液中检查电位动力学极化，并通过扫描电子显微镜（SEM）检测腐蚀表面。结果表明，梯度涂层可以增强CrNx涂层H13钢的腐蚀性能。耐腐蚀性的提高不仅归因于厚度的增加，而且归因于内部的微观结构和相组成。事实证明，由于其不连续的针孔和不同的成分（内部为Cr，Cr2N和表面为CrN），在这项工作中生产的梯度CrNx涂层在耐腐蚀性方面特别有前途。结果表明，该梯度涂层比双相CrN涂层具有更好的电化学性能。 （C）2003 Elsevier Science B.V.保留所有权利。 [参考：6]

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