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ISO/FDIS 19691

Measurement method of corrosion for weathering steel structures

General information

50.20     May 1, 2026

ISO

ISO/TC 156

International Standard

91.080.13     77.060  

Scope

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.

Life cycle

NOW

PROJECT
ISO/FDIS 19691
50.20 Proof sent to secretariat or FDIS ballot initiated: 8 weeks
May 1, 2026

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