Overview

EN ISO 8251:2018 (CEN adoption of ISO 8251:2018) defines standardized test methods for measuring the abrasion resistance of anodic oxidation coatings on aluminium and its alloys. Published by CEN and prepared by ISO/TC 79, this European Standard replaces EN ISO 8251:2011 and is intended for use in quality control, comparative testing and specification of anodized aluminium surfaces.

Key topics and technical requirements

The standard specifies three principal test methods and related technical requirements:

Abrasive‑wheel‑wear test
- Measures abrasion resistance using an abrasive wheel on flat specimens.
- Includes apparatus descriptions (abrasive-wheel test rig, abrasive strip), specimen preparation and result expressions (wear resistance, wear index, mass wear index).
- Instruments referenced include eddy‑current meters and balances.
Abrasive jet test
- Uses a jet of abrasive particles to determine comparative abrasion resistance.
- Covers apparatus and nozzle calibration, abradant specification, use of reference specimens and calculation of abrasive jet factors and specific abrasion resistance.
Falling sand abrasion test
- Designed for thin anodic coatings and uses falling sand to abrade the surface.
- Describes apparatus, test environment and two measurement options (electrical conductivity method using an ohmmeter, and spot‑diameter method).

Additional technical content:

Procedures for specimen sampling, conditioning and test execution
Expression and reporting of results, including calibration and calculation methods
Informative annexes on specimen preparation, apparatus design, alternative result expressions and depth surveys

Note: Use of the abrasive‑wheel and abrasive jet tests for hard anodizing is discussed in ISO 10074.

Practical applications

EN ISO 8251:2018 is used to:

Verify and compare abrasion resistance of anodized coatings for product acceptance.
Support quality control in anodizing plants and metallurgical laboratories.
Guide R&D when developing new anodic coatings or process parameters.
Provide objective test data for procurement specifications and conformity assessment in sectors such as automotive, aerospace, architectural façade systems, electronics and consumer goods.

Who should use this standard

Anodizing service providers and coating manufacturers
Materials and surface‑engineering laboratories
Design engineers, OEMs and specifiers requiring abrasion performance data
Standards committees and regulatory bodies

Related standards

ISO 10074 (hard anodizing - use of abrasive‑wheel and abrasive jet tests)
National implementations of EN ISO 8251:2018 by CEN member bodies

Keywords: EN ISO 8251:2018, ISO 8251:2018, anodizing, anodic oxidation coatings, abrasion resistance, aluminium, abrasive‑wheel, abrasive jet, falling sand, surface treatment.

Overview

Key topics and technical requirements

The standard specifies three principal test methods and related technical requirements:

Abrasive‑wheel‑wear test
- Measures abrasion resistance using an abrasive wheel on flat specimens.
- Includes apparatus descriptions (abrasive-wheel test rig, abrasive strip), specimen preparation and result expressions (wear resistance, wear index, mass wear index).
- Instruments referenced include eddy‑current meters and balances.
Abrasive jet test
- Uses a jet of abrasive particles to determine comparative abrasion resistance.
- Covers apparatus and nozzle calibration, abradant specification, use of reference specimens and calculation of abrasive jet factors and specific abrasion resistance.
Falling sand abrasion test
- Designed for thin anodic coatings and uses falling sand to abrade the surface.
- Describes apparatus, test environment and two measurement options (electrical conductivity method using an ohmmeter, and spot‑diameter method).

Additional technical content:

Procedures for specimen sampling, conditioning and test execution
Expression and reporting of results, including calibration and calculation methods
Informative annexes on specimen preparation, apparatus design, alternative result expressions and depth surveys

Note: Use of the abrasive‑wheel and abrasive jet tests for hard anodizing is discussed in ISO 10074.

Practical applications

EN ISO 8251:2018 is used to:

Verify and compare abrasion resistance of anodized coatings for product acceptance.
Support quality control in anodizing plants and metallurgical laboratories.
Guide R&D when developing new anodic coatings or process parameters.
Provide objective test data for procurement specifications and conformity assessment in sectors such as automotive, aerospace, architectural façade systems, electronics and consumer goods.

Who should use this standard

Anodizing service providers and coating manufacturers
Materials and surface‑engineering laboratories
Design engineers, OEMs and specifiers requiring abrasion performance data
Standards committees and regulatory bodies

Related standards

ISO 10074 (hard anodizing - use of abrasive‑wheel and abrasive jet tests)
National implementations of EN ISO 8251:2018 by CEN member bodies

Keywords: EN ISO 8251:2018, ISO 8251:2018, anodizing, anodic oxidation coatings, abrasion resistance, aluminium, abrasive‑wheel, abrasive jet, falling sand, surface treatment.

EN ISO 8251:2018 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Practical applications

Who should use this standard

Related standards

Related standards

Abstract

Overview

Key topics and technical requirements

Practical applications

Who should use this standard

Related standards

Related standards

Anodizing of aluminium and its alloys — Measurement of abrasion resistance of anodic oxidation coatings

Anodizing of aluminium and its alloys — Measurement of abrasion resistance of anodic oxidation coatings

Anodizing of aluminium and its alloys — Specification for hard anodic oxidation coatings on aluminium and its…