Lead forms a dense lead oxide film on the surface of the air, a lead carbonate film in the humid air containing carbon dioxide, and a lead sulfate film in sulfuric acid, which play a good protective role. Therefore, lead has excellent corrosion resistance in many media, especially in sulfuric acid. The corrosion rate in the atmosphere of lead industrial area is 0.00043~0.00068mm/a; The corrosion rate in natural seawater is 0.01~0.015mm/a; When the concentration of sulfuric acid is as high as 70% - 80% and the temperature is 50 ℃, lead still has good corrosion resistance.