Research On Anti-Icing And Anti-Corrosion Performance Of Aluminum-based Transmission Tower Lines

Ice coating of transmission towers lines in winter has always been a problem that people pay attention to,which brings great inconvenience to people's production and life.At present,deicing methods for transmission towers lines include mechanical deicing,melting deicing,solution deicing,etc.Since these deicing methods consume a lot of manpower and resources and have great limitations,a new method is needed to solve this problem.After more than half a century's development,more and more people have studied the active deicing method based on the preparation of superhydrophobic coating.Based on this background,this paper studies the performance of superhydrophobic coatings in the field of anti-icing.The research prepares three different superhydrophobic coatings and analyzes the preparation process,surface morphology,anti-icing,anti-corrosion,and durability performance.The experimental contents and results of this paper are as follows:Firstly,nano-TiO₂,ethylcellulose,and terpineol are used as raw materials for spin evaporation to prepare a coating,which was calcined and hydrophobic modified to obtain the superhydrophobic surface.The water contact angle can reach 159°and the rolling angle is less than 3°.Nano-TiO₂ formed micro-nano clusters through the adhesion of ethylcellulose and got the micro-nano double roughness structure that we needed.Because this special structure has poor thermal conductivity,it can delay icing.In the environment of-20?,the icing rate of the superhydrophobic coating surface is only 60%of that of the blank sample,and in the icing time of 6 hours,the ice on the superhydrophobic coating surface is reduced.In addition,the superhydrophobic surface has a good self-cleaning effect.However,anatase TiO₂has a strong catalytic degradation performance,which does not great improvement to the durability of the superhydrophobic coating,but provides a basis for the subsequent research.Secondly,nano-SiO₂ was prepared by the sol-gel method,and then it was steamed and hydrophobically modified with hydroxypropyl methylcellulose and terpineol as raw materials.The water contact angle of the prepared superhydrophobic coating can reach 155°,and the rolling angle is less than 3°.In terms of friction resistance,it can withstand 11 times of 20g/time sand impact.In terms of corrosion resistance,it can withstand soaking in p H=1-14 solution for up to 48 hours.In the anti-icing test,it can reduce the adhesion of ice by 40%and delay the icing time by 150 seconds.Finally,to further improve the durability,anti-corrosion,and anti-icing performance of the superhydrophobic coating.Mixed the SiO₂and polyvinylidene fluoride(PVDF)solution,and then hydrophobically modified them by simple impregnation method,thus obtaining a durable superhydrophobic coating.The experimental results show that the water contact angle is 159°and the rolling angle is less than 3°.The hydrophobic property is stable in the temperature range of 30-350?.Under outdoor conditions,it can withstand strong ultraviolet radiation for up to 100 days.In addition,in terms of corrosion resistance,it can withstand immersion for up to 120 hours in p H=1-12 solution.In the anti-icing test,the superhydrophobic coating can prolong the freezing time by 4 times and reduce the adhesion of ice on the substrate by 40%,which has remarkable anti-icing performance.