| Substation grounding grids are an essential equipment to ensure the safety and the reliable operation of the power system,to guarantee the safety of operators and then gas equipment.In our country,in the result of corrosion and the fracture of grounding network,the accident of power system often caused by these defects,moreover,each accident often suffers huge economic loss and causes bad social influence.With the rapid development of our country,the power consumption has been growing both in our industry and our life.In order to meet the demand of our society,the technology of electric power has been developing rapidly.At the same time,smart grid has been aroused.Moreover,the scale of the production and the capacity of power production have been quickly expanding.In this situation,power system put forward more strict demand on grounding grid to ensure that the system operates more safely and stability.It is necessary to make the grounding system more strictly what is demand the safety performance of located in a more strict and stable operationsystems.Currently,conventional methods applied to prevent the corrosion of the ground grid and ground Deflectors have their own defects,such as that using galvanized steel can’t provide effective corrosion protection when grounding grid exists discharge current.For instance,copper has the applicant as the erosion resistant coating on grounding grid which shows excellent conductive ability as well as superior resistance quality of corrosion.In consequence,this material can sustain the corrosion under complex enviroment,nevertheless,that will lead to the price of the production more expensive which is undesirable at present economically.Meanwhile,in the long-term the application of conductive anticorrosion coating is more effectual ways.A novel composite fluorocarbon anti-corrosion coating material with excellent conductivity was successfully fabricated with fluorocarbon resin（FEVE）as matrix in this thesis.Physical and chemical properties of the coating was measured according to the national standard and industry standards,and the following conclusions were draw:（1）Conductive polyaniline（PANI）owns good compatibility in fluorocarbon resin,resulting that the coating formed by shows excellent surface properties as well as a certain conductivity.Conductive PANI can be considered t as conductive filler filling into fluorocarbon with other fillers to prepare anti-corrosion conductive coating.The adding amount of conductive PANI should be controlled at about or below 40%.（2）A conductive coating was fabricated with fluorocarbon resin（FEVE）and graphite modified by Cetyltrimethyl Ammonium Bromide（CTAB）as matrix and conductive filler respectively.Before and after modification,the aggregate size of graphite particles were decreased by 4～5μm to 1～2μm.CTAB and graphite are combined by van der Waals forces,enhancing the dispersion of graphite in fluorocarbon resin.（3）The conductive threshold of the conductive coating,which shows excellent conductivity with values of 10-2?·m,filled with graphite before and after modified by CTAB is 50%and 40%,and the coating shows excellent conductive capability with volume resistivity of 7×10-2?·m.（4）Electrochemical analysis shows that conductive coating has great impact on corrosion resistance of carbon steel by coating on the surface to block the contact of corrosion medium and the metal resulting the decrease of corrosion rate.Besides,the conductive coating has outstanding heat resistance. |
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