The application of weathering steel in future bridge construction will consume a lot of resources and lead to natural environment pollution and ecological environment damage, among which infrastructure corrosion will take a large share. In developed countries, weathering steel has gradually been widely used as a common steel, and the application system has become increasingly perfect. It is an inevitable trend to expand the application of weathering steel. High Performance Steel (HPS) has become a hot spot in the research of international steel materials. China is a big country in bridge engineering. Although weathering bridge steel has been applied in China, the progress of large-scale application is slow, which is 40 to 50 years behind that of developed countries.
High performance bridges should be viewed from the perspective of economy, technological innovation and aesthetics. Popularizing the public's awareness of weathering resistance, deeply understanding the rules and application characteristics of steel weathering resistance, and strengthening investigation and research are the prerequisites for expanding the use of weathering steel. The correct national strategy, policy and corrosion management are very important for expanding the application of weathering steel. Bridge design, material research and development, corrosion control and supporting national standards are the four important links to expand the application of weathering steel. In each link, special attention must be paid to the design details, such as: construction of steel bridges without expansion joints, coating protection for different parts of weathering steel members, prevention of local corrosion and crevice corrosion, and setting critical standards for various polluted environments.
