Abstract
A new type of coating brush plating solutioncontaining stannous sulfate and potassium pyrophosphate was prepared by solution mixing method.Its structures, physicochemical properties, and the application effect in power equipment contact were also investigated by electrochemical workstation, X-ray photoelectron spectroscopy (XPS), scanning electron microsco (SEM), Mapping, and infrared thermometer. The results showed that the tin coating has good adaptability to the ambient temperature and good adhesion with the copper substrate. Cerium nitrate was evenly distributed over the tin plating layer, reduced the crystal refinement of tin and lead to a uniform distribution of microdefects. When the cerium nitrate content, the amount of additives, the amount of complex agent, and the number of brush plating operations are 0.1%, 10.0%, 8.0%, and 5 times, respectively, the tin plating layer has the best electrochemical performance. For application, the damaged contacts of power equipment can fully meet the demand of power use after being treated by the new brush plating solution.
Highlights
With the rapid development of electric power system and the improvement on the demand of power supply quality by consumers, the power stabilization technology is facing a new challenge
About 20% of power equipment failures are caused by overheating of the contact such as the guide joint and terminal post of the equipment, and almost 80% of power failures are caused by overheating of the contact during the peak period of power consumption
Wang et al [11] prepared a tin-based coating on 316LN stainless steel, the results indicated that the coatings on stainless steel improved corrosion resistance
Summary
With the rapid development of electric power system and the improvement on the demand of power supply quality by consumers, the power stabilization technology is facing a new challenge. A variety of brushes protective coating is widely used to protect power equipment joints from corrosion or damage. Brush plating is widely used to repair and strengthen the surface of parts of electric power facilities because of its advantages of light equipment, flexible process and little environmental pollution [7,8,9]. There are few reports on the effects of cerium-based oxides on the repair of electrical equipment contacts of tin brush plating solution. The aim of this work was to develop a new type of coating tin brushes plating solution based on stannous sulfate and potassium pyrophosphate, and investigated the influences of cerium nitrate, additives, complex agent, and number of brush plating on the anticorrosion behavior of metal components. The pH of the solution was adjusted to neutral by sodium hydroxide and nitric acid
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