EN 4868:2023

Aerospace series - Anodic electrodeposition of hexavalent chromium free primer

This document defines the requirements for hexavalent chromium free anodic electrodeposition of organic coatings on aluminium and aluminium alloys for corrosion protection of parts.
The purpose of this document is to give design, quality and manufacturing requirements. It does not give complete in-house process instructions; these are given in the processors detailed process instructions.

Luft- und Raumfahrt - Anodische Elektrotauchlackierung von chrom(VI)-freier Grundierung

Dieses Dokument legt die Anforderungen für die chrom(VI)-freie anodische Elektrotauchlackierung von organischen Beschichtungen zum Korrosionsschutz von Teilen aus Aluminium und Aluminiumlegierungen fest.
Dieses Dokuments legt Gestaltungs , Qualitäts  und Herstellungsanforderungen fest. Es legt keine vollständigen Anweisungen für interne Prozesse fest; diese sind in den detaillierten Prozessanweisungen des Verarbeiters festgelegt.

Série aérospatiale - Électrodéposition anodique d'un primaire sans chrome hexavalent

Le présent document spécifie les exigences relatives à l'électrodéposition anodique sans chrome hexavalent de revêtements organiques sur l'aluminium et les alliages d'aluminium pour la protection de pièces contre la corrosion.
Ce document spécifie les exigences de conception, de qualité et de fabrication. Il ne spécifie pas de gamme de production complète ; ces informations sont spécifiées dans les instructions détaillées de l’applicateur relatives au procédé.

Aeronavtika - Anodno potopno barvanje s temeljno barvo brez šestvalentnega kroma

Ta dokument določa zahteve za anodno potopno barvanje organskih prevlek na aluminiju ali aluminijevih zlitinah s temeljno barvo brez šestvalentnega kroma za korozijsko zaščito vseh delov.
Namen tega dokumenta je določiti zahteve glede zasnove, kakovosti in proizvodnje. Ne podaja popolnih navodil glede internega procesa, ki bodo podana v izvajalčevih podrobnih navodilih glede procesa.

General Information

• Status: Published
• Publication Date: 24-Oct-2023
• 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: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 25-Oct-2023
• Completion Date: 25-Oct-2023
• Ref Project: SIST EN 4868:2023 - Aerospace series - Anodic electrodeposition of hexavalent chromium free primer

Relations

• Replaces: EN 4868:2019 - Aerospace series - Anodic electrodeposition of hexavalent chromium free primer
• Effective Date: 18-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2023
Aeronavtika - Anodno potopno barvanje s temeljno barvo brez šestvalentnega
kroma
Aerospace series - Anodic electrodeposition of hexavalent chromium free primer
Luft- und Raumfahrt - Anodische Elektrotauchlackierung mit einer Grundierung ohne
hexavalentes Chrom
Série aérospatiale - Électrodéposition anodique d'un primaire sans chrome hexavalent
Ta slovenski standard je istoveten z: EN 4868:2023
ICS:
49.040 Prevleke in z njimi povezani Coatings and related
postopki, ki se uporabljajo v processes used in aerospace
letalski in vesoljski industriji industry
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 4868
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2023
EUROPÄISCHE NORM
ICS 49.040 Supersedes EN 4868:2019
English Version
Aerospace series - Anodic electrodeposition of hexavalent
chromium free primer
Série aérospatiale - Électrodéposition anodique d'un Luft- und Raumfahrt - Anodische
primaire sans chrome hexavalent Elektrotauchlackierung von chrom(VI)-freier
Grundierung
This European Standard was approved by CEN on 12 June 2023.

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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 4868:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
3.1 General terms . 6
3.2 Technical terms . 7
4 Purpose of process . 7
4.1 General. 7
4.2 Applicability . 7
4.3 Limitations . 8
5 Protection system classification . 8
6 Process requirements . 8
6.1 Information for the processor . 8
6.2 Condition of parts prior to the treatment . 8
6.3 Process conditions . 9
6.3.1 Tooling . 9
6.3.2 Masking . 9
6.3.3 Surface pre-treatment . 9
6.3.4 Anodic electrodeposition . 9
6.3.5 Anodic electrodeposition post-treatments . 10
6.4 Water quality . 10
6.5 Rework . 10
7 Required characteristics . 10
7.1 General. 10
7.2 Visual appearance . 10
7.3 Film thickness . 10
7.4 Physical properties of the film . 10
7.5 Corrosion performance of coated parts . 10
7.5.1 Filiform corrosion. 10
7.5.2 Corrosion resistance . 11
7.6 Fatigue requirements and test methods . 11
7.7 Fluid resistance . 11
8 Quality requirements . 11
8.1 Process approval . 11
8.2 General points . 11
8.3 Periodic tests . 11
8.4 Periodic chemical analysis . 12
8.5 Parts acceptance inspections . 12
8.5.1 Inspections before treatment . 12
8.5.2 Inspections during treatment . 12
8.5.3 Inspections after anodic electrodeposition . 12
Annex A (normative) Engineering requirements . 13
Annex B (normative) Test methods . 16
Annex C (normative) Parts acceptance inspections . 17
Annex D (normative) Periodic tests requirements . 18
Annex E (informative) Standard evolution form . 19
Bibliography . 20

European foreword
This document (EN 4868:2023) has been prepared by the Aerospace and Defence Industries
Association of Europe — Standardization (ASD-STAN).
After enquiries and votes carried out in accordance with the rules of this Association, this
document has received the approval of the National Associations and the Official Services of the
member countries of ASD-STAN, prior to its presentation to CEN.
This document shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by April 2024, and conflicting national standards shall be
withdrawn at the latest by April 2024.
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 4868:2019.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this document: 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.

1 Scope
This document specifies the requirements for hexavalent chromium free anodic electrodeposition of
organic coatings on aluminium and aluminium alloys for corrosion protection of parts.
This document specifies design, quality and manufacturing requirements. It does not specify complete
in-house process instructions; these are specified in the processors detailed process instructions.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 3840, Aerospace series — Paints and varnishes — Technical specification
EN ISO 1518-1, Paints and varnishes — Determination of scratch resistance — Part 1: Constant-loading
method (ISO 1518-1)
EN ISO 1519, Paints and varnishes — Bend test (cylindrical mandrel) (ISO 1519)
EN ISO 2409, Paints and varnishes — Cross-cut test (ISO 2409)
EN ISO 2812-1, Paints and varnishes — Determination of resistance to liquids — Part 1: Immersion in
liquids other than water (ISO 2812-1)
EN ISO 2812-2, Paints and varnishes — Determination of resistance to liquids — Part 2: Water immersion
method (ISO 2812-2)
EN ISO 4623-2, Paints and varnishes — Determination of resistance to filiform corrosion — Part 2:
Aluminium substrates (ISO 4623-2)
EN ISO 4628-8, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity
and size of defects, and of intensity of uniform changes in appearance — Part 8: Assessment of degree of
delamination and corrosion around a scribe or other artificial defect (ISO 4628-8)
EN ISO 4628-10, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity
and size of defects, and of intensity of uniform changes in appearance — Part 10: Assessment of degree of
filiform corrosion (ISO 4628-10)
EN ISO 9227, Corrosion tests in artificial atmospheres — Salt spray tests (ISO 9227)
EN ISO 17872, Paints and varnishes — Guidelines for the introduction of scribe marks through coatings on
metallic panels for corrosion testing (ISO 17872)

3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
3.1 General terms
3.1.1
OEM
producer who has the design authority and manufactures products or componen
...