期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 806, 期 -, 页码 1357-1367出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.07.308
关键词
ZrO2 films; CeO2 films; Cubic phase; Barrier coatings; Anticorrosion coatings; Surface topography
资金
- Bulgarian National Science Fund at the Ministry of Education and Science [DN07/2]
One-component CeO2 coatings and bi-component CeO2/ZrO2 multilayer coatings were obtained by a sol gel process. The phase composition, surface morphology and roughness of the samples were studied by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), Atomic force microscopy (AFM) and X-ray scanning electron microscopy (XPS). The corrosion resistance and protective ability were characterized by using salty solution of 3.5% NaCl at 25 degrees C. The multilayer configuration of CeO2 and ZrO2 ensure enhanced protection of the steel in comparison to the single CeO2 coatings and uncoated steel. The surface morphology and anticorrosion properties depend significantly on the treatment temperature of both CeO2 underlayer and ZrO2 top layer. At lower treatment temperatures, they are relatively dense and smooth. The corrosion resistance of the multilayers slows down, when ZrO2 coatings were heated above 500 degrees C. This probably is due to the more pronounced crystallization of cubic zirconium dioxide, resulting in deeper boundaries between the individual grains. The protective properties of a CeO2/ZrO2 multilayers could be attributed to the low crystallized structure with very fine crystallites. Potentiodynamic measurements showed that all multilayer systems have more negative corrosion potential values compared to the corrosion potential of the steel substrate and will protect it in the case of corrosion attack due to electrochemical reasons. (C) 2019 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据