SIST EN 2516:2020

SLOVENSKI STANDARD
01-marec-2020
Nadomešča:
SIST EN 2516:2001
Aeronavtika - Pasiviranje korozijsko odpornih jekel in dekontaminacija nikljevih
zlitin
Aerospace series - Passivation of corrosion resisting steels and decontamination of
nickel base alloys
Luft- und Raumfahrt - Passivieren von korrosionsbeständigen Stählen und
Dekontaminierung von Nickellegierungen
Série aérospatiale - Passivation des aciers résistants à la corrosion et décontamination
des alliages base nickel
Ta slovenski standard je istoveten z: EN 2516:2020
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 2516
EUROPEAN STANDARD
NORME EUROPÉENNE
January 2020
EUROPÄISCHE NORM
ICS 49.040 Supersedes EN 2516:1997
English Version
Aerospace series - Passivation of corrosion resisting steels
and decontamination of nickel base alloys
Série aérospatiale - Passivation des aciers résistants à Luft- und Raumfahrt - Passivieren von
la corrosion et décontamination des alliages base korrosionsbeständigen Stählen und Dekontaminierung
nickel von Nickellegierungen
This European Standard was approved by CEN on 11 November 2019.

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, Turkey 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
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 2516:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Purpose of process . 4
5 Applicability and limitations of the process . 4
6 Information for the processor . 5
7 Condition of the parts prior to processing . 5
8 Pre-treatments . 5
9 Treatment . 6
10 Required characteristics and inspections. 7
11 Quality assurance . 8
12 Health, safety and environmental aspects . 8
13 Designation . 9
Annex A (normative) Recommended passivation solutions . 10
Annex B (informative) Standard evolution form . 12
Bibliography . 13

European foreword
This document (EN 2516:2020) 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 Standard has
received the approval of the National Associations and the Official Services of the member countries of
ASD, 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 July 2020, and conflicting national standards shall be withdrawn at
the latest by July 2020.
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.
According to the CEN-CENELEC Internal Regulations, the national standards organisations 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, Turkey and the United
Kingdom.
1 Scope
This standard specifies several chemical methods of passivation for corrosion resisting steels (austenitic,
ferritic, martensitic and precipitation hardenable) and of decontamination for nickel or cobalt base alloys.
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 ISO 9227, Aerospace series — Corrosion tests in artificial atmospheres — Salt spray tests
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
 ISO Online browsing platform: available at http://www.iso.org/obp
 IEC Electropedia: available at http://www.electropedia.org/
4 Purpose of process
To improve the corrosion resistance characteristics of a part after such treatments as machining, forming,
tumbling and shot peening by removing foreign metal contamination due to these operations.
Passivation shall not be used on castings, welded or brazed parts, carburized or nitrided surfaces nor on
parts with mating surfaces when entrapment of acids may occur.
5 Applicability and limitations of the process
This specification is applicable for the following corrosion resisting alloys:
 austenitic steels;
 austenitic ferritic steels;
 martensitic chromium steels;
 ferritic steels;
 austenitic precipitation hardenable steels;
 martensitic precipitation hardenable steels;
 heat resisting nickel or cobalt base alloys.
This specification is not applicable for:
 unalloyed or low-alloyed carbon steel;
 powder metallurgy alloys;
 surface modified steel i.e. with case-hardened, carburized or nitrided surfaces;
 soldered or brazed alloys;
 items containing joints and cavities where it is not possible to mask prior to passivation or to ensure
complete removal of the passivation solution.
6 Information for the processor
 Designation, refer to Clause 13;
 reference of the material standard and its metallurgical condition;
 process schedule, if necessary ;
 areas to be masked.
7 Condition of the parts prior to processing
Fabrication of the parts shall have been completed before treatment.
8 Pre-treatments
All parts shall be submitted to a surface preparation process. The surface preparation process may
include mechanical and/or chemical and/or electrochemical methods, singly or in combination.
Necessary sub steps (e.g. cleaning, degreasing, descaling, abrasive blasting, activation, pickling, rinsing,
drying, masking) depend on the degree of contamination. Although descaling or other steps may be
necessary before passivation can be effective, these steps shall be indicated in the process instructions.
The composition of appropriate surface preparation chemicals may depend on the grade of the corrosion
resisting steel to be treated. Alloying elements, contaminations and mechanical processing may influence
the sensitivity of the
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