CoAl2O4/TiO2 nano composite as an anti-corrosion pigment

被引：16
作者：
Hamzah, Mohammed Hussein [1 ]
Eavani, Sara [2 ]
Rafiee, Ezzat [1 ,2 ]
机构：
[1] Razi Univ, Inst Nanosci & Nanotechnol, Kermanshah 67149, Iran
[2] Razi Univ, Fac Chem, Kermanshah 67149, Iran
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2020年 / 242卷
关键词：
cobalt aluminate; Anti-corrosion pigment; Titanium dioxide; Composite materials; NEAR-INFRARED REFLECTANCE; HYBRID PIGMENTS; COBALT; SPINEL;
D O I：
10.1016/j.matchemphys.2019.122495
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
It is well-known that corrosion the incorporation of inorganic pigments is efficient and economical way to improving the corrosion protection performance of the epoxy coating. In this study a series of eco-friendly anti corrosive nano composite pigments was synthesized by precipitating of different weight percentages of CoAl2O4 on the surface of TiO2 nanoparticles followed by a calcination process. The bright blue colored pigment was obtained using only 10 wt% of CoAl2O4 to TiO2. Coating of epoxy and nano composite doped coating was applied on mild steel substrate for corrosion analysis. The effect of the weight % of CoAl2O4 on anti-corrosive properties of the epoxy/nano composite coatings was investigated by electrochemical impedance spectroscopy in 3.5% NaCl solution. The composite pigment comprising about 70 wt% of TiO2 covered with a thin layer of CoAl2O4 showed the best anti corrosion properties. The corrosion protection of 99.99% was obtained from Tafel plot.
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页数：7
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