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采用喷砂毛化处理、化学刻蚀和氟化处理复合法在X52管线钢表面成功地制备了超疏水表面.十七氟癸基三乙氧基硅烷(HFTTMS)对其表面进行低能化修饰.研究了化学刻蚀液浓度、化学刻蚀时间对管线钢表面形貌及表面与水的润湿行为的影响.结果表明,在一定的盐酸浓度下,随着化学刻蚀时间的延长,管线钢表面与水的接触角增大;然而当化学刻蚀时间过长,管线钢表面与盐酸反应过久,表面微结构的复杂程度减小,接触角将减小.随盐酸浓度的升高,管线钢表面与盐酸反应变得剧烈,表面微观形貌变得复杂,分形维数增大.当盐酸浓度过高时,表面微细凸起结构又被腐蚀掉,导致表面复杂程度降低,分形维数下降,与水的接触角随之减小.试样在7 mol/L的盐酸中刻蚀1.5 h后,喷砂毛化管线钢表面能获得最佳的表面复合结构,经氟化处理后,与水接触角为156.4°,获得良好的超疏水性.
The surface of X52 pipeline steel was successfully prepared by sandblasting, chemical etching and fluoridation composite method, and its surface was modified by HFTTMS. The effects of chemical etching solution concentration and chemical etching time on the surface morphology and surface wettability of pipeline steel were investigated.The results show that with the increase of chemical etching time, However, when the chemical etching time is too long, the reaction between the surface of the pipeline steel and hydrochloric acid is too long, the complexity of the surface microstructure decreases and the contact angle will decrease. With the increase of hydrochloric acid concentration, The reaction between steel surface and hydrochloric acid becomes violent, the surface microscopic morphology becomes complicated and the fractal dimension increases, and when the concentration of hydrochloric acid is too high, the surface fine convex structure is corroded again, resulting in the decrease of surface complexity and the decrease of fractal dimension , The contact angle with water decreases.After the sample is etched for 1.5 h in 7 mol / L hydrochloric acid, the best surface composite structure can be obtained on the surface of sandblasting pipeline steel, after fluoridation, The water contact angle is 156.4 °, resulting in good superhydrophobicity.