Corrosion resistance of Ni-based coatings deposited by spray and fuse technique varying oxygen flow
Corrosion resistance of Ni-based coatings deposited by spray and fuse technique varying oxygen flow
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DOI：
10.1016/j.surfcoat.2017.04.068
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发表时间：
2017-07
影响因子：
5.4
通讯作者：
H. Jiménez;J. Olaya;J. Alfonso;C. Pineda-Vargas
中科院分区：
文献类型：
--
作者：
H. Jiménez;J. Olaya;J. Alfonso;C. Pineda-Vargas
本文采用喷涂熔融法在灰铸铁基体上制备了镍基涂层。腐蚀后的涂层表面进行了研究，通过扫描电子显微镜（SEM）和质子激发X射线发射光谱（PIXE）和卢瑟福背散射光谱（RBS）分析确定其化学组成。采用粉末X射线衍射（XRD）分析了镀层的晶体结构和性能，采用动电位极化法研究了镀层和基体在3.5%NaCl溶液中的腐蚀行为。涂层腐蚀区的化学成分分析表明，腐蚀区为Cl结构。最后，研究建立了晶体学参数和耐腐蚀性之间的关系。
In this work, Ni-based coatings were deposited, at four oxygen flow conditions, on grey cast iron substrates by the spray and fuse technique. The corroded coatings surfaces were studied by scanning electron microscopy (SEM) and their chemical composition was determined by proton induced X-ray emission (PIXE) and Rutherford backscattering spectrometry (RBS) analysis. Using powder X-ray diffraction (XRD) spectrometry the crystallographic structure and properties of the coatings were characterized.The corrosion behavior of the Ni-based coatings and substrate were evaluated by potentiodynamic polarization using a NaCl 3.5% solution. The chemical composition in the corrosion areas of the coatings showed that corroded zones are Cl structures. Finally, the study established a relationship between the crystallographic parameters and the corrosion resistance.