Q235钢超疏水表面制备及耐蚀性能研究

发布时间：2018-04-23 08:10

本文选题：刻蚀 + 粗糙度　；参考：《中国腐蚀与防护学报》2016年06期

【摘要】：采用化学刻蚀与低表面能修饰的方法在Q235钢基体上制得超疏水表面。通过扫描电镜(SEM)、激光共聚焦显微镜(CLSM)、接触角测量仪研究了刻蚀液组成对金属表面粗糙度以及润湿性的影响。利用电化学工作站对其表面防腐性能进行了测试。结果表明:通过化学刻蚀和低表面能物质修饰相结合的方法成功地制备了超疏水表面;刻蚀液中硝酸的浓度对金属表面粗糙度起主要作用,随着刻蚀液中硝酸浓度的增加,粗糙度呈现先增大后减小的趋势。通过在粗糙结构表面构筑低表面能涂层可以获得超疏水表面,经浓度为20%(质量分数)硝酸刻蚀液刻蚀的表面涂覆二甲基硅氧烷(PDMS)后,疏水性最佳,接触角为163°。电化学数据表明,超疏水金属表面具有较好的防腐性能,这主要是由超疏水表面的空气层、PDMS层和疏水金属表面三者的协同作用形成的腐蚀抑制作用。
[Abstract]:The superhydrophobic surface was prepared on Q235 steel substrate by chemical etching and low surface energy modification. The influence of the composition of etching solution on the surface roughness and wettability of metal was studied by means of scanning electron microscope (SEM), laser confocal microscope (LCM) and contact angle measuring instrument. The surface anticorrosion performance was tested by electrochemical workstation. The results show that the superhydrophobic surface has been successfully prepared by chemical etching and low surface energy material modification, and the concentration of nitric acid in the etching solution plays a major role in the surface roughness of the metal, with the increase of nitric acid concentration in the etching solution. Roughness increases first and then decreases. The superhydrophobic surface can be obtained by constructing a low surface energy coating on the rough structure surface. The hydrophobicity of the surface etched with 20% nitric acid etching solution coated with dimethylsiloxane (PDMS) is the best, and the contact angle is 163 掳. The electrochemical data show that the superhydrophobic metal surface has good anticorrosion performance, which is mainly caused by the synergistic effect of PDMS layer and hydrophobic metal surface on the superhydrophobic surface.
【作者单位】：中国科学院宁波材料技术与工程研究所中国科学院海洋新材料与应用技术重点实验室浙江省海洋材料与防护技术重点实验室;烟台大学化学化工学院;
【分类号】：TG174.4

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