| WANG Tian-cong,HOU Guo-liang,SU Qiong,CUI Hai-xia,CHEN Lei,ZHOU Hui-di,CHEN Jian-min.Research Progress of Anti-cavitation Erosion Polyurethane Coating[J],52(6):153-165 |
| Research Progress of Anti-cavitation Erosion Polyurethane Coating |
| |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2023.06.014 |
| KeyWord:polyurethane coating cavitation erosion damage mechanism modification multi-function |
| Author | Institution |
| WANG Tian-cong |
Key Laboratory of Science and Technology on Wear and Protection of Materials CAS, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou , China;School of Chemical Industry, Northwest Minzu University, Lanzhou , China |
| HOU Guo-liang |
Key Laboratory of Science and Technology on Wear and Protection of Materials CAS, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou , China |
| SU Qiong |
School of Chemical Industry, Northwest Minzu University, Lanzhou , China |
| CUI Hai-xia |
Key Laboratory of Science and Technology on Wear and Protection of Materials CAS, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou , China |
| CHEN Lei |
Key Laboratory of Science and Technology on Wear and Protection of Materials CAS, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou , China |
| ZHOU Hui-di |
Key Laboratory of Science and Technology on Wear and Protection of Materials CAS, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou , China |
| CHEN Jian-min |
Key Laboratory of Science and Technology on Wear and Protection of Materials CAS, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou , China |
|
| Hits: |
| Download times: |
| Abstract: |
| As a special form of material destruction, cavitation erosion causes huge economic losses and material losses to ships, water conservancy and hydropower industries every year, especially irreversible damage to key parts such as turbine and propeller, which seriously affects the economic development and safety management of the aquatic industry. Fortunately, with the in-depth study of cavitation generation, harm and protective measures, it is found that polyurethane polymer is a good anti-cavitation erosion coating material and its excellent impact resistance, low price and high elasticity will greatly reduce or even offset the harm caused by cavitation erosion. In addition, the coating area of polyurethane is very wide and the construction is convenient, which greatly reduces the construction difficulty. These outstanding advantages make polyurethane elastomer materials occupy an extremely important position in the field of cavitation erosion resistance. With the increasing size and speed of flow parts such as turbines and propellers, the problem of cavitation damage becomes more prominent. Therefore, polyurethane coating which is easy to apply, design and control is always the research focus in the field of cavitation resistance. In order to better promote the development of cavitation erosion resistant polyurethane elastomer materials and meet the needs of practical application, the cavitation erosion was reported for the first time, and presented to illustrate the effects of water industry and related harm. By comparing the metal coating and organic coating as the merits and demerits of the cavitation erosion resistance materials, the results indicated that polyurethane coating had strong impact resistance, high resilience polyurethane elastomer, and convenient construction and the coating area was extensive, arousing the research interest of Chinese and foreign scholars, and was considered as a kind of material with the most application potential in China and abroad, and required to be further studied. Then, the development history of polyurethane elastomer cavitation erosion resistance coating in China and abroad was summarized and the existing problems of polyurethane elastomer as anti-cavitation erosion coating were pointed out deeply, and how to solve these problems was comprehensively and systematically analyzed. Low surface energy functional group was introduced on the polyurethane and the effect of the resistance on water and adhesion of polyurethane composite coating was discussed through chemical modification, inorganic nanofillers on polyurethane abrasion resistance, mechanical properties and the effect of adding active anti-fouling ions on PU soil resistance was analyzed. Combined with the structure of polyurethane, special specific strategies and methods were given. At present, most of the researches on polyurethane anti-cavitation erosion coating in China and abroad still focus on the evaluation of anti-cavitation erosion ability, and the damage mechanism of cavitation erosion on polyurethane has not been a reasonable explanation. According to previous studies, erosion damage to polyurethane is mainly in the form of mechanical damage and thermal damage, but the effect of these two damage forms on molecular weight, functional group and elemental valence state of polyurethane is unknown. On this basis, the development direction of cavitation erosion resistant polyurethane elastomer coating is pointed out, from cavitation erosion on the damage mechanism of polyurethane exploration into how to introduce the self-healing polyurethane coating. Finally, in view of the urgent demand for high-performance cavitation resistance coating that can be used stably for a long time in harsh environments such as the ocean, the development of new polyurethane materials, such as self-healing polyurethane, which integrates the functions of antifouling, cavitation resistance, wear resistance and self-repair, is reasonably prospected. |
| Close |
|
|
|