铝基碳化硅复合材料超疏水表面的蚀刻制备及性能表征  

Preparation of Super-hydrophobic Surface of SiC/2024Al Composite Through Chemical Etching and Its Properties

作　　者：张瑞麟 郭钟宁[1] 江树镇[1] 吴明[1] 罗红平[1] 王冠[1] 

机构地区：[1]广东工业大学机电工程学院,广州510006

出　　处：《腐蚀科学与防护技术》2018年第1期61-66,共6页Corrosion Science and Protection Technology

基　　金：国家自然科学基金(51575113);广州市科技计划(201604030065;201604010041)~~

摘　　要：通过简单的盐酸溶液蚀刻方法在2024铝基碳化硅复合材料基体上制备出超疏水表面,电镜观察结果显示,蚀刻后复合材料中碳化硅颗粒自身作为超疏水结构所必需的微米级结构,而碳化硅微粒上又具有纳米级颗粒,形成了类似荷叶表面的微米-纳米二级复合结构。结合氟硅烷修饰,获得了接触角高达157.02°,滚动角5°的超疏水表面。实验研究了不同蚀刻液浓度和时间对表面疏水性的影响,得到特定条件下的最佳工艺参数:盐酸溶液浓度15%(质量分数),蚀刻时间2 min。性能测试结果表明,所制超疏水表面具有较好的抗酸碱性能、稳定性、耐磨性和抗腐蚀性能。Super-hydrophobic surface of SiC/2024 Al composite was prepared firstly via a simple chemical etching method and then finishing with fluoroalkyl silane. The surface morphology of the etched SiC/2024 Al composite was characterized by means of FSEM. Results show that after chemical etching,the polished surface of SiC particulates within SiC/2024 Al composite becomes a surface with composite structures both in micro-and nano-scales, which was highly similar to that of the lotus-leaf surface. The optimal etching parameters were acquired that the concentration of etchant was 15%（mass fraction） HCl solution and the etching time was 2 min. After the post finishing with, the prepared super-hydrophobic surface exhibits a water contact angle of 157.02° and a tilting angle of 5°. The super-hydrophobic surface possesses comprehensive performance such as good stability and wear-resistance, as well as acid-and alkali-resistance. In addition, results of potentiodynamic polarization measurement reveal that the superhydrophobic surface can obviously enhance the corrosion resistance of the composite material in 3.5%（mass fraction） Na Cl aqueous solution.

关 键 词：超疏水表面 铝基碳化硅复合材料 微米-纳米二级复合结构 盐酸蚀刻 

分 类 号：TG172[金属学及工艺—金属表面处理]