EN ISO 11125-5:2025

Preparation of steel substrates before application of paints and related products - Test methods for metallic blast-cleaning abrasives - Part 5: Determination of percentage defective particles and of microstructure (ISO 11125-5:2025)

This document specifies test methods for the determination of the percentage of defective particles and of the microstructure of metallic blast-cleaning abrasives.

Vorbereitung von Stahloberflächen vor dem Auftragen von Beschichtungsstoffen - Prüfverfahren für metallische Strahlmittel - Teil 5: Bestimmung des Anteils an defekten Körnern und des Gefüges (ISO 11125-5:2025)

Dieses Dokument legt Prüfverfahren zur Bestimmung des prozentualen Anteils von defekten Körnern und des Gefüges von metallischen Strahlmitteln fest.

Préparation des subjectiles d'acier avant application de peintures et de produits assimilés - Méthodes d’essai pour abrasifs métalliques destinés au décapage par projection - Partie 5: Détermination du pourcentage de particules défectueuses et de la microstructure (ISO 11125-5:2025)

Le présent document spécifie des méthodes d’essai pour la détermination du pourcentage de particules défectueuses et de la microstructure des abrasifs métalliques destinés au décapage par projection.

Priprava jeklenih podlag pred nanašanjem barv in sorodnih premazov - Preskusne metode za kovinske granulate za peskanje - 5. del: Določanje odstotka poškodovanih delcev in mikrostrukture (ISO 11125-5:2025)

Ta dokument določa preskusne metode za določanje odstotka poškodovanih delcev in mikrostrukture kovinskih granulatov za peskanje.

General Information

• Status: Published
• Publication Date: 05-Aug-2025
• ICS: 25.220.10 - Surface preparation
• Technical Committee: CEN/TC 139 - Paints and varnishes
• Drafting Committee: CEN/TC 139 - Paints and varnishes
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 06-Aug-2025
• Completion Date: 06-Aug-2025
• Ref Project: SIST EN ISO 11125-5:2025 - Preparation of steel substrates before application of paints and related products - Test methods for metallic blast-cleaning abrasives - Part 5: Determination of percentage defective particles and of microstructure (ISO 11125-5:2025)

Relations

• Replaces: EN ISO 11125-5:2018 - Preparation of steel substrates before application of paints and related products - Test methods for metallic blast-cleaning abrasives - Part 5: Determination of percentage defective particles and of microstructure (ISO 11125-5:2018)
• Effective Date: 21-Jun-2023

Overview

EN ISO 11125-5:2025 is an international standard developed by CEN and ISO that specifies test methods for metallic blast-cleaning abrasives used in surface preparation of steel substrates prior to painting or coating. This standard focuses on determining the percentage of defective particles and analyzing the microstructure of metallic abrasives such as shot, grit, and cylindrical particles. It updates and replaces the 2018 edition, ensuring more precise and harmonized testing to guarantee quality in abrasive materials.

Proper preparation of steel surfaces via blast cleaning is critical to the performance and durability of protective coatings. EN ISO 11125-5:2025 provides a consistent approach for assessing metallic abrasive quality, essential for industries such as shipbuilding, construction, and manufacturing where optimal surface preparation impacts coating adhesion and corrosion resistance.

Key Topics

• Scope
  Specifies test methods to determine defective particle percentages and microstructural characteristics of metallic blast abrasives.

• Test Methods

  • Detection of cracks, voids, and shrinkage defects in particles using binocular microscopes at magnifications up to ×50.
  • Identification of defectively shaped particles across different abrasive forms (shot, grit, cylindrical).
  • Examination of abrasive microstructure via metallurgical microscopy up to ×500 magnification.

• Sampling and Sample Preparation
  Calls for representative sampling (per ISO 11125-1) and specific preparation and mounting techniques (per ISO 11125-3) to ensure accurate and reproducible test results.

• Defect Definitions and Calculations

  • Defects such as cracks, voids, shrinkage, and improper shapes are quantified as percentages of total particles assessed.
  • Careful observation protocols prevent misclassification of particle shapes and ensure consistency.

• Reporting Requirements
  Includes detailed instructions for documenting test findings, aiding traceability and compliance verification.

Applications

EN ISO 11125-5:2025 is crucial in sectors where steel substrates require abrasive blasting before applying protective coatings or paints:

• Surface Preparation in Industrial Coatings
  Ensures the use of high-quality metallic abrasives for efficient surface cleaning and optimal coating adhesion.

• Corrosion Protection
  Helps in selecting abrasives that will not compromise the surface or coating integrity due to physical defects.

• Quality Control in Abrasive Manufacturing
  Enables abrasive producers to monitor and certify product quality, reducing defective particles that could impair blasting performance.

• Compliance with Paint and Coating Standards
  Aligns blast cleaning abrasives testing with broader coating application standards for reliable, durable surface finishes.

Related Standards

• ISO 11125-1: Sampling of Metallic Blast-Cleaning Abrasives
  Provides methodologies for obtaining representative samples of abrasives submitted for testing.

• ISO 11125-3: Determination of Hardness of Metallic Abrasives
  Focuses on hardness testing to complement particle quality and microstructural assessments.

• ISO 11124 Series: Requirements and Specifications for Different Types of Metallic Abrasives
  Defines types, properties, and quality parameters of metallic abrasives used in blast-cleaning processes.

Conclusion

Adoption of EN ISO 11125-5:2025 ensures consistent and rigorous evaluation of metallic blast-cleaning abrasives, facilitating effective surface preparation before paint or coating application. By accurately identifying defective particles and assessing abrasive microstructure, industries enhance product quality, improve coating performance, and maintain compliance with international standards. This standard is an essential tool for manufacturers, coating specialists, and quality assurance professionals involved in steel surface treatment and protection.

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2025
Nadomešča:
SIST EN ISO 11125-5:2018
Priprava jeklenih podlag pred nanašanjem barv in sorodnih premazov - Preskusne
metode za kovinske granulate za peskanje - 5. del: Določanje odstotka
poškodovanih delcev in mikrostrukture (ISO 11125-5:2025)
Preparation of steel substrates before application of paints and related products - Test
methods for metallic blast-cleaning abrasives - Part 5: Determination of percentage
defective particles and of microstructure (ISO 11125-5:2025)
Vorbereitung von Stahloberflächen vor dem Auftragen von Beschichtungsstoffen -
Prüfverfahren für metallische Strahlmittel - Teil 5: Bestimmung des Anteils an defekten
Körnern und des Gefüges (ISO 11125-5:2025)
Préparation des subjectiles d'acier avant application de peintures et de produits
assimilés - Méthodes d’essai pour abrasifs métalliques destinés au décapage par
projection - Partie 5: Détermination du pourcentage de particules défectueuses et de la
microstructure (ISO 11125-5:2025)
Ta slovenski standard je istoveten z: EN ISO 11125-5:2025
ICS:
25.220.10 Priprava površine Surface preparation
87.020 Postopki za nanašanje Paint coating processes
barvnih premazov
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 11125-5
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2025
EUROPÄISCHE NORM
ICS 25.220.10 Supersedes EN ISO 11125-5:2018
English Version
Preparation of steel substrates before application of paints
and related products - Test methods for metallic blast-
cleaning abrasives - Part 5: Determination of percentage
defective particles and of microstructure (ISO 11125-
5:2025)
Préparation des subjectiles d'acier avant application de Vorbereitung von Stahloberflächen vor dem Auftragen
peintures et de produits assimilés - Méthodes d'essai von Beschichtungsstoffen - Prüfverfahren für
pour abrasifs métalliques destinés au décapage par metallische Strahlmittel - Teil 5: Bestimmung des
projection - Partie 5: Détermination du pourcentage de Anteils an defekten Körnern und des Gefüges (ISO
particules défectueuses et de la microstructure (ISO 11125-5:2025)
11125-5:2025)
This European Standard was approved by CEN on 8 February 2025.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11125-5:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 11125-5:2025) has been prepared by Technical Committee ISO/TC 35 "Paints
and varnishes" in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes” the
secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by February 2026, and conflicting national standards
shall be withdrawn at the latest by February 2026.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 11125-5:2018.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 11125-5:2025 has been approved by CEN as EN ISO 11125-5:2025 without any
modification.
International
Standard
ISO 11125-5
Third edition
Preparation of steel substrates
2025-07
before application of paints and
related products — Test methods
for metallic blast-cleaning
abrasives —
Part 5:
Determination of percentage
defective particles and of
microstructure
Préparation des subjectiles d'acier avant application de peintures
et de produits assimilés — Méthodes d’essai pour abrasifs
métalliques destinés au décapage par projection —
Partie 5: Détermination du pourcentage de particules
défectueuses et de la microstructure
Reference number
ISO 11125-5:2025(en) © ISO 2025

ISO 11125-5:2025(en)
© ISO 2025
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 11125-5:2025(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Apparatus . 1
5 Sampling . 1
6 Preparation of the sample . 2
7 Procedure . 2
7.1 Determination of cracks, voids and shrinkage .2
7.2 Determination of defectively shaped shot particles .2
7.3 Determination of defectively shaped grit particles .2
7.4 Determination of defectively shaped cylindrical particles .3
7.5 Determination of defectively shaped irregular particles .3
7.6 Determination of microstructure .3
8 Test report . 3
Bibliography
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