期刊
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
卷 29, 期 4, 页码 353-358出版社
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2013.01.014
关键词
Nanometer metal; Organic coatings; Salt spray test; Electrochemical impedance spectroscopy
资金
- National Key Technology RD Program [2012BAB15B00]
A two-stage process was used to produce nano-composite epoxy coatings. The first step involved preparing nano-Al concentrates with high concentration and low viscosity, and the second step produced nanocomposite epoxy coatings by mixing the nano-Al concentrates and epoxy resin. Later, the coating was examined with immersion and salt spray tests. The coatings were characterized by electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The results showed that the 5% nano-Al significantly improves the corrosion resistance of the coatings. There are two effects of nano-Al on the coating. Nano-Al is corroded initially to protect the substrate from corrosion, and then the aluminum oxide and aluminum hydroxide were produced after corrosion of nano-Al, which hindered the transmission of corrosion fluid into the coatings.
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