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ISO/NP 27237-3

Corrosion of metals and alloys — Evaluation method for corrosion from the appearance of rust on weathering steel structures — Part 3: Evaluation of protective patina characteristics

General information

10.20     Oct 30, 2026

ISO

ISO/TC 156

International Standard

Scope

This document specifies supporting methods for evaluating qualitative characteristics of protective patina formed on weathering steel structures. The methods include patina thickness measurement, rust sample analysis, section-loss measurement by ultrasonic testing, pit-depth measurement and electrochemical evaluation.

Life cycle

NOW

PROJECT
ISO/NP 27237-3
10.20 New project ballot initiated
Oct 30, 2026