In the field of industrial manufacturing, metal surface treatment is a crucial link to enhance the performance and extend the service life of metals. Different surface treatment methods have their own advantages and disadvantages. Chemical treatment, such as electroplating, can form a uniform coating on the metal surface, significantly improving corrosion resistance and aesthetics. However, its drawback is that it may produce harmful wastewater, polluting the environment, and the cost is relatively high. Mechanical treatment, such as polishing, can make the metal surface smooth and improve the surface quality. However, this method may cause material loss and the processing efficiency is relatively low. Thermal spraying treatment can form a special coating on the metal surface, enhancing wear resistance and high - temperature resistance. However, the large equipment investment and complex process limit its wide application. In comparison, chemical treatment performs well in terms of corrosion prevention and aesthetics, but the environmental protection cost is high; mechanical treatment is simple to operate, but the problems of efficiency and material loss are prominent; thermal spraying treatment has significant performance improvement, but the economic efficiency is not good. In practical applications, enterprises need to comprehensively weigh and select appropriate metal surface treatment methods according to their own needs, cost budgets, and environmental protection requirements. Only in this way can the economic and environmental benefits be maximized while improving the performance of metals.