ISO 11126-11:2025

Overview

ISO 11126-11:2025 is an international standard published by the International Organization for Standardization (ISO). It outlines the specifications for using volcanic lava as a non-metallic blast-cleaning abrasive. This document is part of the ISO 11126 series, which covers a range of non-metallic abrasives used for the preparation of steel substrates prior to the application of paints and related coatings. ISO 11126-11:2025 specifically details the requirements for particle size, density, hardness, moisture content, and water-soluble contaminants for volcanic lava abrasives supplied in "new" condition.

Key Topics

• Volcanic Lava Abrasives: Defines volcanic lava as a natural, non-metallic abrasive material processed by washing, drying, sieving, and possibly mechanical crushing.
• Particle Size Distribution: Specifies detailed requirements for particle sizes and grading, helping ensure consistent performance in blast-cleaning processes.
• Physical and Chemical Properties: Includes requirements for:
  • Apparent density
  • Minimum Mohs hardness
  • Maximum moisture content
  • Maximum conductivity of aqueous extract
  • Maximum water-soluble chlorides
• Quality Assurance: Details identification, marking, and supplier information to be provided, ensuring traceability and compliance with the standard.
• Safety Note: Emphasizes safe handling and awareness of hazards associated with blast-cleaning processes.

Applications

The primary application of ISO 11126-11:2025 is in the surface preparation of steelwork prior to painting or coating. By specifying the characteristics and quality of volcanic lava abrasive, the standard helps to achieve optimal surface cleanliness and profile, promoting better adhesion and longevity of protective coatings.

While developed specifically for steel substrate preparation, volcanic lava abrasives compliant with this standard may also be suitable for preparing other materials and components using blast-cleaning techniques, such as aluminum and non-ferrous metals, depending on project requirements.

Typical industries and use cases include:

• Shipbuilding and marine structures
• Bridges and large infrastructure projects
• Petrochemical plants and storage tanks
• General industrial maintenance and refurbishment
• OEM manufacturing with surface-coating processes

Related Standards

ISO 11126-11:2025 is closely connected with other standards in the field of abrasive blast-cleaning:

• ISO 11127 Series – Provides test methods for non-metallic blast-cleaning abrasives, including:
  • ISO 11127-1: Sampling
  • ISO 11127-2: Particle size distribution
  • ISO 11127-3: Apparent density
  • ISO 11127-4: Hardness determination
  • ISO 11127-5: Moisture determination
  • ISO 11127-6: Conductivity measurement
  • ISO 11127-7: Water-soluble chlorides determination
• ISO 8504-2 – Describes abrasive blast-cleaning techniques for surface preparation of steel substrates.

By adhering to ISO 11126-11:2025 and its related references, manufacturers, suppliers, and end-users can ensure the consistent quality, safety, and performance of volcanic lava abrasives for industrial surface preparation. This standard supports reliable coating application processes and enhances the durability of treated surfaces.