| YU Hui,NIE Sai,ZHANG Yu-quan,QIN Cheng,ZHENG Yuan,HAN Zhao.Preparation of Superhydrophobic Coating on the Flowing Surface of Pumped-storage Units and Its Anti-scaling and Anti-corrosion Performance[J],49(8):249-256 |
| Preparation of Superhydrophobic Coating on the Flowing Surface of Pumped-storage Units and Its Anti-scaling and Anti-corrosion Performance |
| Received:October 07, 2019 Revised:August 20, 2020 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2020.08.029 |
| KeyWord:superhydrophobic coating flowing surface spraying anti-scaling anti-corrosion |
| Author | Institution |
| YU Hui |
1.Jiangxi Hongping Pumped Storage Company Limited, Yichun , China |
| NIE Sai |
1.Jiangxi Hongping Pumped Storage Company Limited, Yichun , China |
| ZHANG Yu-quan |
2.Hohai University, Nanjing , China |
| QIN Cheng |
1.Jiangxi Hongping Pumped Storage Company Limited, Yichun , China |
| ZHENG Yuan |
2.Hohai University, Nanjing , China |
| HAN Zhao |
1.Jiangxi Hongping Pumped Storage Company Limited, Yichun , China |
|
| Hits: |
| Download times: |
| Abstract: |
| The work aims to improve the anti-scaling and anti-corrosion performance on the flowing surface. The scale composition on the flowing surface of pumped-storage power station in Jiangxi Province was characterized by the inductively coupled plasma optical mission spectrometry and the ion chromatography. The main factors for formation of scale were also analyzed. The flowing surface of pumped-storage units was simulated by Q235 low-carbon steel substrate. Subsequently, the scale and corrosion resistance was improved by preparing superhydrophobic coating on flowing surface. The modified SiO2 microsphere-fluoropolymer mixed coating liquid was prepared by emulsion polymerization method with commercial Zonyl® TM as the hydrophobic modifier. The superhydrophobic surface was obtained via spraying process on the surface of Q235 low-carbon steel substrate. The anti-scaling and anti-corrosion performance of the superhydrophobic coating was investigated by the coupon test. The water droplet contact angle on the superhydrophobic surface of low-carbon steel substrate reached 151.8°, the surface energy decreased to 5.1 mN/m, and the water droplet sliding angle was 7.8°, indicating a good superhydrophobicity. In the coupon test, the surface without the superhydrophobic coating was severely corroded, while the surface with the superhydrophobic coating showed no obvious corrosion. Additionally, the superhydrophobic coating effectively reduced the total weight gain of scale on the substrate by 88.9% from 45 g/m2 to 5 g/m2. The superhydrophobic coating can be successfully fabricated on the simulated flowing surface by spraying process, which effectively avoids the surface corrosion and reduces the degree of scaling on the surface. This method has shown good application prospects in the fields of anti-scaling and anti-corrosion for the flowing surface. |
| Close |
|
|
|