摘要
针对冬季高速列车转向架区域结冰现象,制备防覆冰涂层来减缓该现象。采用超音速火焰喷涂WC-Co粉末制备微纳结构涂层,并在其表面修饰不同低表面能物质,研究低表面能修饰工艺对涂层表面静态接触角的影响。结果表明:采用不同浓度和工艺参数处理的疏水气相纳米二氧化硅均可提高接触角,最佳低表面能修饰工艺为:SiO2丙酮溶液浓度20 mg/mL,喷涂距离250~300 mm,喷射角度75°~80°,喷枪移速60 mm/s,喷涂道次为5次,压缩空气压力为0.65 MPa。采用该工艺可获得接触角为154.3°±3.0°,滚动角为4.1°±0.1°的涂层。
For the icing phenomenon in the bogie area of high-speed train in winter,the anti-icing coating is prepared to slow down the phenomenon.In this paper,the micro-nano structure coating is prepared by supersonic flame spraying WC-Co powder,and different low surface energy materials are modified on its surface to study the influence of low surface energy modification on the static contact angle of coating.The results show that adopting hydrophobic fumed nano silica treated with different concentrations and procedure parameters,the contact angle can be increased.The optimum low surface energy modification procedure is as following:the concentration of SiO2 acetone solution is 20 mg/mL,spraying distance is 250~300 mm,spraying angle is 75°~80°,spray gun moving speed is 60 mm/s,spraying passes are 5 times,and compressed air pressure is 0.65 MPa.And the contact angle of 154.3°±3.0°and rolling angle of 4.1°±0.1°can be obtained by this procedure.
作者
刘楠
张相宁
杨桂英
席乃园
刘艳
LIU Nan;ZHANG Xiangning;YANG Guiying;XI Naiyuan;LIU Yan(CRRC Tangshan Co.,Ltd.,Tangshan 064000,China;School of Materials Science and Engineering,South-west Jiaotong University,Chengdu 610031,China)
出处
《电焊机》
2020年第8期86-90,I0007,共6页
Electric Welding Machine
关键词
超疏水
低表面能
涂层
静态接触角
superhydrophobic
low surface energy
coat-ing
static contact angle
