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Citation: ZHANG Chun, ZHANG Hongming, LI Yingping, LI Ji, WANG Xianhong. Preparation and Anti-corrosion Property of Polyaniline Waterborne Coatings[J]. Chinese Journal of Applied Chemistry, ;2012, 29(5): 504-509. doi: 10.3724/SP.J.1095.2012.00200 shu

Preparation and Anti-corrosion Property of Polyaniline Waterborne Coatings

ZHANG Chun ^a,b ,
ZHANG Hongming ^a ,
LI Yingping ^a,b ,
LI Ji ^a ,
WANG Xianhong ^a,,

1.
a Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China;
2.
b Graduate University of Chinese Academy of Science, Beijing 100049, China

Corresponding author: WANG Xianhong,
Received Date: 11 May 2011
Available Online: 10 November 2011
Fund Project: 国家自然科学基金资助项目(51073156) (51073156)

Polyaniline doped with an organic phosphate(PANI-OP) was blended with water-borne epoxy resin and used as an anti-corrosion material.The long-term anti-corrosion behavior of the material was investigated.Transmission electron microscopy showed that the PANI-OP powder was uniformly dispersed in the waterborne epoxy resin when the PANI content was below 1%.The diameter of the particle decreased to ca.50~100 nm when the PANI content was 0.1%.Electrochemical impedance spectroscopy and the changes in open circuit potential indicated that the presence of polyaniline coating significantly improved the anti-corrosion effect.X-rays photoelectron spectra showed that a dense passive film of iron oxide(FeO and Fe₂O₃) on the surface was accounted for the anti-corrosion;in the meanwhile,the presence of P indicated that the dopant ion was also involved in the corrosion protection process.
- polyaniline,
- waterborne epoxy resin,
- mild steel,
- anti-corrosion
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