高黏附性超疏水表面的制备及耐腐蚀性

利用电化学沉积技术在碳钢基底上制备了Co-Ni过渡层,再通过双辉等离子表面合金化技术(DGPSA)在过渡层上沉积了Cr涂层,经全氟辛基三氯硅烷(PFTEOS)溶液修饰后,制备出了具有高黏附性的超疏水表面。利用扫描电镜(SEM)、EDS、X射线衍射仪(XRD)、X射线光电子能谱仪(XPS)、接触角测量仪、电化学测试等方法表征了涂层的形貌、物相组成、润湿性能、粘附性以及耐腐蚀性能,探究了DGPSA技术不同沉积时间对Cr涂层表面形貌和润湿性能的影响。结果表明,在沉积温度为750 ℃,沉积时间30 min 时,制备出了具有微纳米乳突状结构的高黏附性超疏水表面,水滴接触角达到159°,水滴在样品倾斜180°也不发生滚落。电化学测试结果证明制备的超疏水表面具有出色的耐腐蚀性能,对碳钢基底起到了良好的腐蚀防护作用。

Preparation and corrosion resistance of highly adhesive superhydrophobic surface

Co-Ni transition layer was prepared on carbon steel substrate using electrochemical deposition, then Cr coating was deposited on the Co-Ni transition layer by double glow plasma surface alloying technique(DGPSA). After modification by PFTEOS solution, a superhydrophobic coating with high adhesion was prepared. The morphology, phase composition, wetting performance, adhesion property and corrosion resistance of the coating were characterized by means of scanning electron microscope(SEM), energy dispersive X-ray spectroscopy(EDS), X-ray diffractometer(XRD), X-ray photoelectron spectrometer(XPS), contact angle measuring instrument and electrochemical test, respectively. The influence of deposition time of DGPSA technique on surface morphology and wetting performance was explored. The results show that the superhydrophobic surface with a papillary structure and high adhesion is prepared under the deposition temperature of 750 ℃ for 30 min. The water contact angle reaches 159° and the water droplet don’t roll off even if the specimen is tilted 180°. The electrochemical test results demonstrate that the as-prepared superhydrophobic surface exhibits excellent corrosion protection for carbon steel substrate.