EN 4902:2026

Aerospace series - Surface treatments - Terms, definitions and test methods

This document specifies definitions to be used in documents related to surface treatments and test methods that can be referred by surface treatment standards.

Luft- und Raumfahrt - Oberflächenbehandlungen - Begriffe, definitionen und Prüfverfahren

No Scope available

Série aérospatiale - Traitements de surface - Termes, définitions et méthodes d'essais

Le présent document spécifie les définitions à utiliser dans les documents liés aux traitements de surface et aux méthodes d’essais qui peuvent être cités en référence par les normes de traitement de surface.

Aeronavtika - Površinske prevleke - Definicije in preskusne metode

General Information

• Status: Not Published
• Publication Date: 13-Jan-2026
• ICS: 01.040.49 - Aircraft and space vehicle engineering (Vocabularies)
• ICS: 49.040 - Coatings and related processes used in aerospace industry
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 4/S 6 - Surface treatments for Metallic
• Current Stage: 6055 - CEN Ratification completed (DOR) - Publishing
• Start Date: 23-Jun-2025
• Completion Date: 23-Jun-2025
• Ref Project: kSIST FprEN 4902:2025 - Aerospace series - Surface treatments - Definitions and test methods

Overview

EN 4902:2026, titled Aerospace series - Surface treatments - Terms, definitions and test methods, is a standard developed by CEN that provides a comprehensive framework of terminology and test methods specifically related to surface treatments in the aerospace industry. This document is foundational for professionals working on aerospace manufacturing processes involving surface coatings and treatments, ensuring uniform understanding and measurement criteria across the industry.

The standard defines key terms used in surface treatment documentation and specifies standardized test methods that surface treatment standards can refer to. It promotes consistency, quality control, and reliability in aerospace surface treatment applications.

Key Topics

• Standardized Terminology: EN 4902:2026 provides essential definitions used in aerospace surface treatment documentation, ensuring all stakeholders-from manufacturers to quality controllers-have a shared vocabulary. Key definitions include:

  • Batch: Group of parts treated simultaneously in the same conditions.
  • Manufacturer: Entity responsible for producing or assembling parts following relevant standards.
  • Original Equipment Manufacturer (OEM): The design authority producing parts under a purchasing company’s brand.
  • Pit (corrosion on anodized aluminum): Identified corrosion defects with specific characteristics such as geometry, halos, and corrosion by-products.
  • Pit (defect in coating): Coating defects caused by gas release during deposition.
  • Processor: Party applying the surface treatment process.
  • Test specimen: Sample object used for assessing surface treatment performance.

• Test Methods: The document specifies test methods critical for evaluating the integrity and quality of surface treatments in aerospace parts. For example:

  • Cross-cut Adhesion Test (EN ISO 2409): Assesses the adhesion strength of coatings. The method involves cutting the coating and applying adhesive tape to evaluate how much coating detaches.
  • Guidelines for tape properties and usage instructions to ensure accurate test performance.

• Process Documentation: Definitions also cover process instruction documents that specify application scopes, environmental and safety rules, process parameters, and quality management requirements.

Applications

EN 4902:2026 serves multiple practical purposes in the aerospace sector:

• Quality Assurance: Enables aerospace manufacturers and surface treatment companies to verify coating adhesion and surface treatment efficacy through standardized testing.
• Supplier and OEM Coordination: Provides shared terminology to avoid ambiguities between OEMs, manufacturers, and processors in contracts, technical documentation, and quality criteria.
• Process Control and Audit: Assists in setting clear process instructions and evaluation methods to maintain strict aerospace surface treatment standards.
• Corrosion Prevention: Defines corrosion-related terms and test methods relevant to anodic coatings on aluminum alloys, a common aerospace material.
• Regulatory Compliance: As a CEN-related standard, it supports compliance with European aerospace industry regulations and harmonizes technical practices across national borders.

Related Standards

• EN ISO 2409: Paints and Varnishes - Cross-cut Test - Directly referenced for defining adhesion test procedures.
• Other aerospace surface treatment standards developed by ASD-STAN, focusing on coating specifications, process requirements, and environmental controls.
• International vocabulary databases such as the ISO Online Browsing Platform and IEC Electropedia provide terminological consistency referenced in EN 4902.

Conclusion

EN 4902:2026 is a critical standard for aerospace professionals involved in surface treatments, ensuring consistency in terminology and test methodologies. By adopting this standard, aerospace manufacturers and processors can improve communication, uphold high-quality surface treatments, and comply with international aerospace manufacturing requirements. It supports the overarching goal of durability, safety, and performance in aerospace components exposed to demanding operational environments.

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 4902:2021
01-november-2021
Aeronavtika - Površinske prevleke - Definicije in preskusne metode
Aerospace series - Surface treatments - Definitions and test methods
Luft- und Raumfahrt - Oberflächenbehandlungen - Definitionen und Prüfverfahren
Ta slovenski standard je istoveten z: prEN 4902
ICS:
01.040.49 Letalska in vesoljska tehnika Aircraft and space vehicle
(Slovarji) engineering (Vocabularies)
49.040 Prevleke in z njimi povezani Coatings and related
postopki, ki se uporabljajo v processes used in aerospace
letalski in vesoljski industriji industry
oSIST prEN 4902:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 4902:2021
oSIST prEN 4902:2021
DRAFT
EUROPEAN STANDARD
prEN 4902
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2021
ICS 49.040; 01.040.49
English Version
Aerospace series - Surface treatments - Definitions and
test methods
Luft- und Raumfahrt - Oberflächenbehandlungen -
Definitionen und Prüfverfahren
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee ASD-
STAN.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, Turkey and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 4902:2021 E
worldwide for CEN national Members.

oSIST prEN 4902:2021
prEN 4902:2021 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Test methods . 5

oSIST prEN 4902:2021
prEN 4902:2021 (E)
European foreword
This document (prEN 4902:2021) has been prepared by the Aerospace and Defence
...