| XU Linhong,SHEN Dong,YANG Hao,LU Luhua,DENG Zhouzhou.Erosion Wear Characteristics of Epoxy Resin Composites Based on Texture Surface[J],53(13):118-127, 138 |
| Erosion Wear Characteristics of Epoxy Resin Composites Based on Texture Surface |
| Received:July 13, 2023 Revised:December 20, 2023 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2024.13.012 |
| KeyWord:erosion wear bionic structure toughened epoxy resin hydrophobic silica |
| Author | Institution |
| XU Linhong |
Faculty of Mechanical & Electrical Information, China University of Geosciences Wuhan, Wuhan , China |
| SHEN Dong |
Faculty of Mechanical & Electrical Information, China University of Geosciences Wuhan, Wuhan , China |
| YANG Hao |
Faculty of Mechanical & Electrical Information, China University of Geosciences Wuhan, Wuhan , China |
| LU Luhua |
Xiamen San-vision Clean Technology Co., Ltd., Fujian Xiamen , China |
| DENG Zhouzhou |
Faculty of Mechanical & Electrical Information, China University of Geosciences Wuhan, Wuhan , China |
|
| Hits: |
| Download times: |
| Abstract: |
| In the process of potassium salt transportation, due to the long-term impact of potassium salt to some transportation tanks, pipelines and other areas, it is very easy to produce erosion and wear. In the transportation process, the way of spraying saturated brine is used to remove dust, but due to the hygroscopicity of potash itself, it may cause the potash to adhere to the surface of the machine, leading to clogging easily. In addition, it will also form a microcell with the surface of the metal equipment, causing electrochemical corrosion on the surface of the transportation equipment. Although surface painting is also used to protect the surface of the transportation equipment, but this is not enough to meet the demand. At present, the special mining and transportation equipment and process of potash are still in the exploratory stage, so most of the commonly used potash mining and transportation equipment is inherited from coal mine machinery. Therefore, in order to obtain a wear-resistant protective layer and prevent the blockage and corrosion caused by the adhesion of potash salt, the work aims to select the corrosion-resistant and highly chemically stable epoxy resin as the surface material subject to erosion, and utilize the homemade silica particles to increase the strength, toughness, and ductility of the epoxy resin in order to overcome the hard and brittle characteristics of the epoxy resin, and at the same time, improves its hydrophobicity to avoid the adhesion of potash salt, and combine with the surface bionic technology to further improve the erosion-resistant performance of the material. The erosion resistance of the material is further improved by combining the surface bionic technology. The hydrophobic SiO2 particles were prepared by sol-gel method with high concentration of ammonia or polymers as catalysts through the co-hydrolysis polycondensation reaction between ethyl acetate orthosilicate and methyltriethoxysilane. A certain amount of epoxy resin was taken at 60 ℃ with an electric stirrer for 5 minutes (speed of 60 r/min), then a certain amount of hydrophobic silica particles as well as an appropriate amount of antifoam agent was added for mixing, and finally an appropriate amount of curing agent was added. Next, the mixture was poured into the homemade silica gel molds with 304 stainless steel substrate for the turnover of the mold at room temperature for curing of 24 hours and the toughened epoxy resin composite coatings were obtained. The bionic morphology model combined the sediment erosion and abrasion resistance of shells and the damping characteristics of the shark skin. The shell cross-section profile and the damping curve of the shark skin were extracted to obtain the shell/shark bionic structure, and then get the bionic toughened epoxy resin coating by the over-molding method. The hydrophobic angle, hardness, abrasion resistance and erosion resistance of the bionic toughened epoxy resin coating were tested and analyzed by optical contact angle meter, Vickers hardness tester, deep microscope, and homemade erosion device. With the increase of hydrophobic silica content, the contact angle rose and the hardness of the toughened epoxy resin showed a tendency to rise and then fall, and the increase of hydrophobic silica content led to the increase of the system concentration in the preparation process, the bubbles introduced during the mixing process were difficult to eliminate, and the phenomenon of the agglomeration of the hydrophobic silica was gradually aggravated. The wear resistance of the bionic morphology specimens was improved compared with that of the non-bionic morphology specimens. Potash media erosion wear performance test results showed that the resistance of epoxy resin coating to potash erosion effect was better, almost without weight loss in the erosion time of the coating. Regarding the erosion medium for diamond sand, the erosion wear test results under different hydrophobic silica contents showed that with the enhancement of the content of hydrophobic silica, toughened epoxy resin erosion rate was a downward trend. A single shell structure mimicry does not effectively improve the erosion and wear performance of epoxy resin composites. The shell/shark bionic structure specimen as S2W1 specimen has the best resistance to erosion and wear, and the erosion rate decreases to 1.4%. |
| Close |
|
|
|