Nanosecond laser fabrication of superhydrophobic surface on 316L stainless steel and corrosion protection application
Nanosecond laser fabrication of superhydrophobic surface on 316L stainless steel and corrosion protection application
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DOI：
10.1016/j.colsurfa.2020.125259
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发表时间：
2020-11
期刊：
影响因子：
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通讯作者：
Yao Lu;Y. Guan;Yuan Li;Li-jun Yang;Mao-lu Wang;Yang Wang
中科院分区：
文献类型：
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作者：
Yao Lu;Y. Guan;Yuan Li;Li-jun Yang;Mao-lu Wang;Yang Wang
在此，我们开发了一种简便、经济且高效的方法，通过激光改性在 316L 不锈钢基材表面制造不同尺度的微观结构。通过改变激光参数，如激光照射时的各种激光注量（2.69、3.96、6.28、8.14、9.55J/cm2），可以获得不同尺寸的微裂纹和类脑微结构。实验结果表明，在扫描间隔为30.0μm、激光注量为8.14J/cm2时，静态接触角为160±5°，滑动角为3±0.5°，具有最佳的润湿性。此外，还分别通过扫描电子显微镜（SEM）和X射线光电子能谱（XPS）检查了表面的微观结构和化学成分。通过动电位极化（PDP）和电化学阻抗谱（EIS）评估了相应的耐腐蚀性能。研究发现，激光纹理化的超疏水表面可以显着提高耐腐蚀性。此外，经过激光改性后，根据石英砂颗粒的测试，显示出优异的自洁性能。特别是，我们广泛讨论了紫外纳秒激光照射后316L不锈钢上的结构如何形成以及激光与基底的相互作用机制。这项研究不仅为激光纹理表面的形成机制提供了重要的见解，而且由于该方法简单、成本低且方便在各种金属材料上制造大面积超疏水表面，因此对实际工业应用具有指导意义。
Herein, we developed an facile, cost-effective and efficient method to fabricate microstructures of different scales on 316 L stainless steel substrate surface by laser modification. By changing the laser parameters, such as various laser fluence (2.69, 3.96, 6.28, 8.14,9.55 J/cm2) during laser irradiation, different sizes of micro-cracks and brain-like microstructures can be obtained. The experimental results indicate that a static contact angle of 160 ± 5° and the sliding angle of 3 ± 0.5°, can be achieved at a scanning interval of 30.0 μm and laser fluence of 8.14 J/cm2, which has the best outstanding wettability. In addition, the microstructures and chemical compositions on the surface were examined by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS), respectively. The corresponding corrosion resistance properties was evaluated by the means of potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS). The laser textured superhydrophobic surface was found to enhance the corrosion resistance dramatically. Also, after the laser modification, excellent self-cleaning performance was demonstrated based on tests with quartz sand particles. Particularly, we extensively discussed how the structures on the 316 L stainless steel were formed after the ultraviolet nanosecond laser irradiation and the interaction mechanism of the laser and substrate. This study not only provides important insights into the formation mechanism of laser textured surfaces, but also guides practical industrial applications as this approach is simple, low-cost and convenient for fabrication of large-area superhydrophobic surfaces on various metal materials.