Abstract:

Composite brush plating technique was used to prepare superhydrophobic n-SiO2/Ni brush plating composite coating on Q235 steel surface. Under the better process parameters, the water contact angle of the obtained super-hydrophobic surface was approximately 1698°, and the water tilting angle was approximately 23°. This paper gave the influences of plating voltage and plating time on the coating surface structure and hydrophobicity, and gave the effects of the moving velocity of brush on the content of n-SiO2 of the composite coating. The structure and morphology of the composite coating surface and its section were also studied. The measurements of the contact angle, surface roughness and microhardness of the coating were carried out. Results show that the plating voltage and plating time are two important parameters for the composite coating surface microstructure characteristics. And the binary micro-nano structure on composite coating surface plays an important role in super-hydrophobic property. 

Key words: brush plating, super-hydrophobic, brush plating composite coating, n-SiO2

摘要：

采用复合电刷镀技术,在Q235钢表面制备了具有超疏水性能的n-SiO2/Ni纳米复合镀层,在优选的工艺参数下,获得了接触角为1698°、滚动角为23°的超疏水表面。研究了刷镀电压和刷镀时间对镀层表面结构和疏水性的影响规律;分析了复合镀层表面和截面的结构形貌特点;研究了电刷移动速度对复合镀层中n-SiO2含量的影响规律。对镀层的接触角、表面粗糙度和显微硬度进行了表征。结果表明：刷镀电压和刷镀时间是影响复合镀层表面微观结构特征的重要因素;复合镀层表面的微纳米双重结构对表面的超疏水性起到了关键的作用。

关键词: 电刷镀, 超疏水, 复合镀层, n-SiO2