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Advanced composite coating by electrodeposition technique

机译：通过电沉积技术进行的高级复合涂层

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摘要

This work aims to prepare Ni-RuAl composite coatings from Watts' solution containing suspension of the single phase powder of the intermetallic compound RuAl. The chemical composition, phase structure and surface morphology of pure Ni and Ni-RuAl composite coatings are investigated using energy dispersive analyser system (EDX), X-ray diffraction (XRD) and scanning electron microscopy (SEM) respectively. The microhardness and oxidation resistance of Ni-RuAl composite coatings in comparison with pure Ni are evaluated. The corrosion behaviour for both of Ni and Ni-RuAl deposits is evaluated by polarisation curves in 3·5% NaCl solution. The results reveal that the content of RuAl in the Ni matrix is a function of applied current density and concentration of RuAl powder in the plating bath. Moreover, the presence of RuAl improves the oxidation and corrosion resistance of Ni coatings. The microhardness of composite coatings increases with the increasing content of the RuAl particles in the deposit.
机译：这项工作旨在从包含金属间化合物RuAl单相粉末悬浮液的Watts溶液制备Ni-RuAl复合涂层。分别使用能量色散分析仪系统（EDX），X射线衍射（XRD）和扫描电子显微镜（SEM）研究了纯Ni和Ni-RuAl复合镀层的化学成分，相结构和表面形态。评价了与纯Ni相比的Ni-RuAl复合涂层的显微硬度和抗氧化性。通过在3·5％NaCl溶液中的极化曲线来评估Ni和Ni-RuAl沉积物的腐蚀行为。结果表明，Ni基体中RuAl的含量是施加电流密度和电镀液中RuAl粉末浓度的函数。而且，RuAl的存在改善了Ni涂层的抗氧化性和耐腐蚀性。复合涂层的显微硬度随沉积物中RuAl颗粒含量的增加而增加。

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  • 来源
    《Surface Engineering》 |2009年第8期|615-620|共6页
  • 作者

    Aal A. Abdel; Gobran H.A.; Muecklich F.;

  • 作者单位

    Surface Protection and Corrosion Control Lab, Central Metallurgical Research & Development Institute, CMRDI, P.O. 87 Hellwan, Cairo, Egypt, Email: foralsayed@gmail.com;

    Surface Protection and Corrosion Control Lab, Central Metallurgical Research & Development Institute, CMRDI, P.O. 87 Hellwan, Cairo, Egypt;

    Functional Materials, Department of Materials Science, Saarland University, Saarbruecken, D-66041, Germany;

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