中国激光, 2020, 47 (8): 0802005, 网络出版: 2020-08-24   

超快激光制备水面减阻微纳结构及其耐蚀性研究 下载: 1435次

Ultrafast Laser Fabricated Drag Reduction Micro-nano Structures and Their Corrosion Resistance
作者单位
清华大学材料学院激光材料加工研究中心, 北京 100084
摘要
减阻对于船舶运输有重要意义。采用超快激光在6061铝合金表面制备多种形状的微纳沟槽结构,研究了飞秒激光制备微纳结构工艺以及微U形沟槽结构表面的减阻性和耐蚀性。研究结果表明:调控超快激光加工参数与扫描路径可以快速制备出各种形状的微沟槽结构,其表面布满烧蚀产生的纳米颗粒,呈超亲水表面;与未经处理的表面相比,周期宽度分别为28 μm和50 μm、深度分别为20 μm和25 μm的两种微U形沟槽结构表面在水槽移动对比实验中的运动时间分别缩短了4.3%和11.6%,表明其水面阻力明显降低;将两种微U形结构表面进行低自由能修饰后形成超疏水表面,将这两种表面在3.5%NaCl溶液中进行耐蚀性测试,其表面腐蚀速率较超疏水处理前分别降低了87%和73%。超快激光制备的微纳结构具有较好的减阻性和耐蚀性,应用前景良好。
Abstract
Drag reduction is of great importance for ship transportation. Various micro-nano groove structures with different section shapes were fabricated on the surfaces of 6061 aluminum alloy using an ultrafast laser. Further, the femtosecond laser fabrication of the drag reduction micro-nano structure, the surface drag reduction effect, and the surface corrosion resistance of the micro-U-shaped groove structures were investigated. Various microgroove structures were quickly fabricated by modulating the processing parameters and the scanning route. Microgroove structures covered with nanoparticles exhibit superhydrophilicity. Compared with the pristine surface, two types of micro-U-shaped groove-structured surfaces with structural period widths of 28 μm and 50 μm and depths of 20 μm and 25 μm shortened their motion time in tank moving experiments by 4.3% and 11.6%, respectively, indicating their effective surface drag reduction. After forming a superhydrophobic surface, the surface corrosion rates of these two micro-U-shaped groove structures tested in 3.5% NaCl solution were decreased by 87% and 73%, respectively. The micro-nano structures fabricated by an ultrafast laser exhibit good drag reduction effect and corrosion resistance, which indicates their valuable application potential.

江国琛, 潘瑞, 陈昶昊, 胡昕宇, 张红军, 钟敏霖. 超快激光制备水面减阻微纳结构及其耐蚀性研究[J]. 中国激光, 2020, 47(8): 0802005. Jiang Guochen, Pan Rui, Chen Changhao, Hu Xinyu, Zhang Hongjun, Zhong Minlin. Ultrafast Laser Fabricated Drag Reduction Micro-nano Structures and Their Corrosion Resistance[J]. Chinese Journal of Lasers, 2020, 47(8): 0802005.

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