Design of Corrosion Allowances on Structures from Weathering Steel

The corrosion rate of the weathering steel is considerably lower than that of the standard carbon steel. In spite of this, possible effects of corrosion losses on reliable service of the structure throughout the designed service life should be considered when designing the structures. In practice, the effects of the expected corrosion losses are typically eliminated by corrosion allowances which are added to the thickness of the element calculated in static analyses.This paper introduces a new method used for calculation of corrosion allowances. The application of the procedure for calculation of corrosion allowances is explained using example of a bridge structure.