Research On Corrosion Resistance Of Insulator By Superhydrophobic Materials

Superhydrophobic coating materials have been developed rapidly,and have potential application value in anti-icing,hydrophobic and self-cleaning valuably.As a result of improving substance and microscopic rough structure of the surface,the hydrophobic property of the superhydrophobic material is further improved by HMDS.In order to study some crucial abilities of the new material applied in various aspects which are affected by general environment and air pollution,such as the corrosion resistance of insulator surface coating and hydrophobicity after been affected,the aging process of corrosion by coating materials was discussed deeply in this paper.By testing and analyzing the physical and chemical properties under some harsh conditions of new coating material after artificial simulation of general environment,the result was valuated systematically,and finally found the benefits in application of new superhydrophobic material.Firstly,the corrosion resistance was tested by series of superhydrophobic material samples under the general environment.The static contact angles and rolling angles were analyzed before and after the tests of soaking in different concentrations of acid and alkali solutions,meanwhile this study has found the relationship between the immersed time.The study showed that the new superhydrophobic materials would be corroded more deeply with the larger concentration of alkaline or acidic solution,because of the static contact angles and rolling angles decreased sharply.Furthermore,it would make the hydrophobicity of this materials damaged worse.The immersed time also would affect the static contact angles and the rolling angles gradually.However,even if this acid and alkali solution test was compared to the former experiments,the performance was still acceptable.It has made a good foundation for improving insulator application environment.Typically,according to the effects on electrical equipment of high temperature and humid environment in some areas of China,a simulated high temperature soaking test was performed for superhydrophobic material.The temperature was added as an independent variable in this part of experiment.The static contact angles and rolling angles were investigated in the same way as general groups.Finally,the results showed that the high temperature tested-group had the similar change rule as the general tested-group.When the temperature increased,the aging corrosion process would be accelerated,and the higher temperature came out the faster aging rate.When the temperature increased to a certain extent,the strong alkali solution would damage the function of hydrophobicity in a short time for incapable measuring.At the same time,the high temperature would enlarge the corrosion performance of weak acids solution.Therefore,hydrophobicity of insulators requires more attention in high temperature and humid environments.In order to verify hydrophobicity of the superhydrophobic material under the influence of the environment and explore its chemical properties,the chemical substances of the general tested-group and the high temperature tested-group were studied through FTIR.By analyzing the results were consistent with the rules which indicated by the former experiments.The microstructure was damaged worse as the corrosion deepened,furthermore there were many tiny protuberances.When severe corrosion occurred under high temperature condition,there were visible peelings off of the surface with many grooves and filamentous substances floating in the solution.Some major perssad were broken chemically,especially those water-related were affected badly,which indicated that the hydrophobic performance was ruined.The above-mentioned experiments comprehensively showed that the development of this new type of superhydrophobic material could improve the corrosion resistance currently,which had controllable performance in the harsh environment to delay aging process.These studies of superhydrophobic material on complex climatic conditions made a researchable learning in insulators of power systems.