Steel bridge corrosion prevention technology

The invention relates to the technical field of steel corrosion prevention and discloses a steel bridge corrosion prevention technology. Steel bridge components, chromium-free passivating fluid and antirust paint are included. The corrosion prevention technology comprises two steps, namely the overall corrosion prevention treatment and connection position corrosion prevention treatment; component overall corrosion prevention treatment is conducted before the components are connected, and after a steel bridge is connected, connection position corrosion prevention treatment is conducted; the component overall corrosion prevention treatment adopts the chromium-free passivating fluid electrogalvanizing method, and two times of electrogalvanizing treatment are conducted after dirt on the surface is cleaned up; the connection position corrosion prevention treatment adopts the thermal zinc spraying method, molten zinc is blown and adsorbed to the surface of the connection position after the dirt on the surface of the connection position is cleaned up, and pores are closed through the antirust paint. The steel bridge corrosion prevention technology is good in corrosion prevention effect, long in corrosion prevention time and high in industrial degree.