3%-Ni Weathering Steel Plate for Uncoated Bridges at High Airborne Salt Environment

Ni weathering steel for uncoated bridges in high air-born salt environments was developed. The ion exchanging functions of the rust layer formed on the 3%Ni- weathering steel play an essential role on giving its high weathering performance. For more successful applications of the new weathering steel for uncoated brides, it is recommended to make use of estimation methods of long-term penetration which give consideration to main environmental factors such as time of wetness, air-born salt deposition rate, mean-temperature etc.