Experiment Research on Uniform Corrosion and Pitting Corrosion of High-Strength BridgeWires

Abstract:

In order to study the uniform corrosion and pitting corrosion of highstrength bridge wires, a total of 30 steel wire specimens on six corrosion levels were prepared by using the acetic acid salt spray test. The variation of uniform corrosion depth and pitting depth was evaluated by using weight analysis and three dimension scanning. The results show that the measured uniform corrosion depth follows the powerlaw distribution. The coefficient of variation of uniform corrosion depth decrease with the corrosion time. The pitting depth follows the normal distribution and maximum pitting depth follows the extreme value distribution. Finally, the prediction models for uniform corrosion depth and maximum pitting depth were established and then applied to the real cables on the bridge.

Key words:highstrength bridge wires; uniform corrosion; pitting corrosion; maximum pitting depth