| TANG Xiao-dong,ZHANG Zhen-hai,XU Li-ping,YANG Xing-liang,ZHANG Qian-feng.Modification of Nano-SiO2 and Its Effect on the Properties of Waterborne Polyurethane Resin Coating[J],42(4):12-16 |
| Modification of Nano-SiO2 and Its Effect on the Properties of Waterborne Polyurethane Resin Coating |
| Received:February 26, 2013 Revised:March 28, 2013 |
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| DOI： |
| KeyWord:nano-SiO2 modification particles size water polyurethane resin electrochemical corrosion resistance |
| Author | Institution |
| TANG Xiao-dong |
Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology, Ma'anshan , China |
| ZHANG Zhen-hai |
Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology, Ma'anshan , China |
| XU Li-ping |
Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology, Ma'anshan , China |
| YANG Xing-liang |
Technique Center, Ma'anshan Iron & Steel Co. , Ltd. , Ma'anshan , China |
| ZHANG Qian-feng |
Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology, Ma'anshan , China |
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| Abstract: |
| In aqueous ethanol solution, the surface of nano-SiO2 was modified by silane coupling agent KH560 . And the particle sizes were measured. The effects of nano-SiO2 content, alcohol percentages and the modification agents on dispersity were discussed. The chromium-free passivation solution was made from the modified nano-SiO2 dispersions, water polyurethane resin and inorganic constituent compound, and it may be coated on the hot galvanized sheet . Corrosion resistances of nano-SiO2 modified polyurethane composite passivation film and unmodified polyurethane composite passivation film were characterized by the electrochemical Tafel polarization curves, AC impedances ( EIS) and the neutral salt spray tests. The results may show that compared with the latter the former corrosion resistance have been greatly improved. |
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