| LI Yang,MENG Long,ZHU Ye,WEI Wei,LUO Jing,LIU Xiao-ya.Preparation and Corrosion Resistance of UPDHES Electrophoretic Coating[J],46(7):161-167 |
| Preparation and Corrosion Resistance of UPDHES Electrophoretic Coating |
| Received:February 10, 2017 Revised:July 20, 2017 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2017.07.027 |
| KeyWord:amphiphilic polymer photocrosslinking micelle particles electrophoretic deposition coating corrosion |
| Author | Institution |
| LI Yang |
School of Material Science and Engineering, Jiangnan University, Wuxi , China |
| MENG Long |
School of Material Science and Engineering, Jiangnan University, Wuxi , China |
| ZHU Ye |
School of Material Science and Engineering, Jiangnan University, Wuxi , China |
| WEI Wei |
School of Material Science and Engineering, Jiangnan University, Wuxi , China |
| LUO Jing |
School of Material Science and Engineering, Jiangnan University, Wuxi , China |
| LIU Xiao-ya |
School of Material Science and Engineering, Jiangnan University, Wuxi , China |
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| Abstract: |
| The work aims to study effects of electrophoretic deposition condition and photo-crosslinking on morphology and properties of coatings prepared by electrodepositing micelles. Firstly, photo-crosslinkable amphiphilic acrylate copolymer (UPDHES) was synthesized by radical polymerization. Its structure was characterized with nuclear magnetic resonance spectrometer (1H-NMR) and Fourier transform infrared spectroscopy. Micelles nano particle solution was obtained through UPDHES self-assembly in selective solvent. Then particle size and morphology of micelles were characterized with nanometer particle size analyzer and TEM. With the micellar solution as electrolyte, photo-crosslinkable coating was prepared on the surface of 316L stainless steel by electrodeposition. Effects of electrodeposition condition and photo-crosslinking on coating morphology and properties were studied with SEM and atomic force microscope (AFM). Corrosion resistance of coatings prepared under different conditions in 1 mol/L HCl was studied with electrochemical workstation. When electrodeposition voltage was 5 V and electrodeposition time was 3 min, the coating prepared by electrophoretic deposition exhibited good smoothness, compactness and uniformity, self-corrosion voltage increased to –0.36 V, considerably higher than that of stainless steel (−0.43 V), and the corrosion resistance was the best. After photocrosslinking, adhesion of the coating increased from grade 2 to grade 1, self-corrosion potential increased to −0.34 V and corrosion resistance further increased. For deposition time and deposition voltage, there is an optimum value which endows the photocrosslinked coating prepared by electrodepositing micelles with complete structure density and good corrosion resistance; photo-crosslinking can further improve corrosion resistance of the coating. |
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