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ISO 8501-3:2025

Preparation of steel substrates before application of paints and related products — Visual assessment of surface cleanliness — Part 3: Preparation grades of welds, edges and other areas with surface imperfections

Publication date:   Aug 12, 2025

General information

60.60   Standard published   Aug 12, 2025

ISO

ISO/TC 35/SC 12 Preparation of steel substrates before application of paints and related products

International Standard

25.220.10   Surface preparation

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Scope

This document provides requirements to identify visible imperfections and defines three preparation grades for welds, edges and surfaces of steel to assist in achieving efficient corrosion protection. Such imperfections can be visible before or can become visible after an abrasive blast cleaning process.
NOTE       Although this document has been developed specifically for preparation of steel, the defined preparation grades will generally be appropriate for use when preparing other metal surfaces e.g. aluminium, castings, if agreed.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 8501-3:2006

NOW

PUBLISHED
ISO 8501-3:2025
60.60 Standard published
Aug 12, 2025