Abstract: In harsh environments, the protective coatings of various types of exposed electromechanical equipment have gradually lost their proper protective function under the erosion of high temperature, high humidity and high salt spray for many years. It needs to be considered in the early stage of the project. Select electromechanical equipment of various systems that can be adapted to the local environment; during the construction process, pay attention to the detailed control of the construction process; in the later maintenance process, carry out normalized management, and timely deal with and solve the problems of exposed equipment due to the outdoor natural environment. Oxidation, corrosion and other problems, in order to achieve the purpose of ensuring the function of the equipment and prolonging the service life of the equipment.