10.20 Oct 30, 2026
ISO
ISO/TC 156
International Standard
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.
PROJECT
ISO/NP 27237-3
10.20
New project ballot initiated
Oct 30, 2026