ISO 11126-7-2018 PDF

Full title and description

St ISO 11126-7-2018 — Preparation of steel substrates before application of paints and related products — Specifications for non‑metallic blast‑cleaning abrasives — Part 7: Fused aluminium oxide. This part specifies the requirements and characteristic values for fused aluminium oxide (electrocorundum) supplied for blast‑cleaning processes used in surface preparation prior to coating application.

Abstract

ISO 11126-7:2018 sets out ranges of particle sizes and limit values for properties of fused aluminium oxide abrasives, including apparent density, bulk density, Mohs hardness, moisture content, conductivity of aqueous extract and water‑soluble chlorides. The requirements apply to abrasives supplied in the new (unused) condition; test methods for verification are provided in the ISO 11127 series. The document is intended to support consistent selection and quality control of abrasives used when preparing steel and similar substrates by blast‑cleaning.

General information

• Status: Published (International Standard).
• Publication date: August 2018 (2018-08).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 25.220.10 — Surface treatment; preparation of surfaces.
• Edition / version: Edition 2 (2018).
• Number of pages: 5 (official ISO published length).

Scope

This part of ISO 11126 specifies requirements for fused aluminium oxide abrasives as supplied for blast‑cleaning processes. It defines acceptable particle‑size ranges and threshold values for physical and chemical properties (apparent and bulk density, hardness, moisture, conductivity of aqueous extract and water‑soluble chlorides). The standard applies only to abrasives in the new (unused) condition and does not cover properties after or during use. Reference is made to the ISO 11127 series for the sampling and test methods required to verify these properties.

Key topics and requirements

• Specification of particle size ranges for fused aluminium oxide grades.
• Limits and test criteria for apparent density and bulk density.
• Minimum hardness characteristics (Mohs hardness) appropriate for blasting.
• Maximum allowable moisture content for supplied abrasives.
• Requirements for conductivity of aqueous extract and water‑soluble chloride content (contaminant control).
• Applicability limited to new (unused) abrasives; excludes in‑service properties.
• Reference to ISO 11127 series for sampling and the standardized test methods used to demonstrate compliance.

Typical use and users

Used by abrasive manufacturers, coating and corrosion engineers, surface‑preparation contractors, specification writers, quality/inspection personnel and asset owners. Typical applications include specifying and verifying abrasive quality for blast cleaning prior to painting or coating of steel structures (bridges, tanks, pipelines, offshore structures, heavy plant) and other substrates where fused aluminium oxide is an appropriate non‑metallic blast medium.

Related standards

ISO 11126‑7 is one part of the ISO 11126 series (specifications for different non‑metallic blast‑cleaning abrasives) and is used together with the ISO 11127 series (test methods). Other related parts include ISO 11126‑1 and the various ISO 11126 parts for other abrasive types (slag, garnet, olivine, etc.), plus ISO 12944 for coating and surface preparation guidance. Test‑method parts in the ISO 11127 series (sampling, particle‑size determination, moisture, chloride and conductivity tests, etc.) provide the procedures to verify compliance with ISO 11126 requirements.

Keywords

fused aluminium oxide; electrocorundum; blast‑cleaning abrasive; surface preparation; ISO 11126; ISO 11127; particle size; moisture; water‑soluble chlorides; apparent density; Mohs hardness.

FAQ

Q: What is this standard?

A: ISO 11126‑7:2018 specifies the requirements for fused aluminium oxide (electrocorundum) abrasives supplied for blast‑cleaning of steel and similar substrates prior to coating application.

Q: What does it cover?

A: It covers accepted particle‑size ranges and characteristic values (apparent and bulk density, Mohs hardness, moisture content, conductivity of aqueous extract and water‑soluble chlorides) for new, unused fused aluminium oxide abrasives; it does not address used abrasives or in‑service changes.

Q: Who typically uses it?

A: Abrasive producers, coating specifiers, surface‑preparation contractors, inspectors, corrosion engineers and asset owners who need to specify or verify abrasive quality for blast cleaning.

Q: Is it current or superseded?

A: This edition was published in 2018 (Edition 2) and, per ISO review records, the 2018 version was confirmed as current in a subsequent systematic review. Users should check national adoption notices for any localized designations or amendments before purchase or citation.

Q: Is it part of a series?

A: Yes — it is Part 7 of the ISO 11126 series (specifications for non‑metallic blast‑cleaning abrasives) and is closely linked to the ISO 11127 series, which contains the standardized sampling and test methods used to verify compliance.

Q: What are the key keywords?

A: Fused aluminium oxide, electrocorundum, blast cleaning, abrasives, surface preparation, particle size, moisture, chlorides, apparent density, Mohs hardness, ISO 11126, ISO 11127.