SIST EN ISO 11126-4:2018 PDF

Overview

EN ISO 11126-4:2018 - "Preparation of steel substrates before application of paints and related products - Specifications for non‑metallic blast‑cleaning abrasives - Part 4: Coal furnace slag" specifies the properties and designation of coal furnace slag abrasives supplied in the new condition for blast‑cleaning. The standard sets requirements for particle size ranges, apparent density, hardness, moisture, conductivity of aqueous extract and water‑soluble chlorides, and defines marking, sampling and information to be supplied by manufacturers. It is intended primarily for steel surface preparation but is also suitable for other materials prepared by blast cleaning.

Key topics and technical requirements

• Scope: Applies only to abrasives supplied in the "new" condition (not during/after use).
• Material description: Coal furnace slag is a vitreous, amorphous synthetic mineral (essentially an aluminium silicate) produced by granulation in water; air‑cooled slags are excluded. Free crystalline silica (quartz, tridymite, cristobalite) ≤ 1 % (mass fraction) as measured by X‑ray diffraction. Material must be free from corrosive or adhesion‑impairing contaminants.
• Particle size and designation: Standard particle size ranges (examples: 0.2–0.5 mm up to 0.2–2.8 mm) with limits on oversize/undersize fractions. Maximum particle size shall not exceed 3.15 mm; particles