ISO/FDIS 19691:2025

This international standard specifies a method for measuring the corrosion loss of each part of structures using unpainted steel such as weathering steel by using the attached coupons Also this standard provides a prediction method for corrosion loss over a long period from the measurement results and a method for determining the applicability of existing and new constructing weathering steel structures. Also this standard provides a method for evaluating the type of corrosion by visual inspection of the appearance of rust on an existing weathering steel structure.