Sol-gel-derived alumina/polyvinylpyrrolidone hybrid nanocomposite film on metal for corrosion resistance

被引：0
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作者：
Jing, Chengbin [1 ]
Hou, Jinxia [1 ]
机构：
[1] College of Materials and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
来源：
Journal of Applied Polymer Science | 2007年 / 105卷 / 02期
关键词：
With the addition of polyvinylpyrrolidone (PVP); alumina sol with an aluminum sec-butoxide/water molar ratio of 1 : 45 was synthesized. The surface tension of this alumina sol was found to be lower by 35% than the sol without PVP. Alumina/PVP hybrid film with a critical thickness up to 2 μm was fabricated by dip-coating method. The heat treatment between 200 and 300°C could produce a film with perfect hybrid nanocomposite structures. Alumina particles with a size of about 20 nm were uniformly distributed in this material. The hardness of the film samples increased with the increment of heat treatment temperature; and hardness values higher than the original metal were detected after heat treated above 400°C. The film-coated metals that were heat treated below 150°C or above 400°C exhibited relatively weak adhesion; but strong adhesion was obtained when heat treated between 200 and 300°C for 30 min. The corrosion rate of the film-coated metal that was heat treated between 200°C and 300°C for 30 min was lower by 95% than the uncoated metal. © 2007 Wiley Periodicals; Inc;
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页码：697 / 705
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