EN 16056:2023

SLOVENSKI STANDARD
01-september-2023
Nadomešča:
SIST EN 16056:2012
Vpliv kovinskih materialov na pripravo pitne vode - Metoda za ovrednotenje
pasivnega vedenja nerjavnih jekel in drugih pasivnih zlitin
Influence of metallic materials on water intended for human consumption - Method to
evaluate the passive behaviour of stainless steels and other passive alloys
Einfluss metallischer Werkstoffe auf Wasser für den menschlichen Gebrauch - Verfahren
zur Ermittlung des Passivverhaltens von nichtrostenden Stählen und anderen
Legierungen
Influence des matériaux métalliques sur l'eau destinée à la consommation humaine -
Méthode d'évaluation du comportement passif des aciers inoxydables et autres alliages
passifs
Ta slovenski standard je istoveten z: EN 16056:2023
ICS:
13.060.20 Pitna voda Drinking water
67.250 Materiali in predmeti v stiku z Materials and articles in
živili contact with foodstuffs
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 16056
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2023
EUROPÄISCHE NORM
ICS 67.250 Supersedes EN 16056:2012
English Version
Influence of metallic materials on water intended for
human consumption - Method to evaluate the passive
behaviour of stainless steels and other passive alloys
Influence des matériaux métalliques sur l'eau destinée Einfluss metallischer Werkstoffe auf Wasser für den
à la consommation humaine - Méthode d'évaluation du menschlichen Gebrauch - Verfahren zur Ermittlung des
comportement passif des aciers inoxydables et autres Passivverhaltens von nichtrostenden Stählen und
alliages passifs anderen Legierungen
This European Standard was approved by CEN on 24 April 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 16056:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Test cell . 5
5 Test water . 6
6 Sample preparation . 6
7 Test procedure . 6
8 Evaluation of test results . 7
9 Report . 7
Annex A (normative) Test cell and presentation of test results . 9

European foreword
This document (EN 16056:2023) has been prepared by Technical Committee CEN/TC 164 “Water
supply”, the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by November 2023, and conflicting national standards
shall be withdrawn at the latest by November 2023.
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 16056:2012.
— scope extension with alloys with a passive behaviour comparable to stainless steel;
— other sample geometries than sheets have been added.
This document is one of a series of test methods which support associated product standards.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
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, Türkiye and the
United Kingdom.
Introduction
The test methods in this series are designed to provide information on metal release over time from
metallic materials into drinking water.
When tested in a test rig as described in EN 15664-1:2008+A1:2013, stainless steels show very low
metal release rates and the resulting metal concentrations in the water are in most cases below the
detection limits of available analytical instruments. The reason for these small metal release rates is the
formation of a passive layer on the surface on stainless steels.
It was therefore decided to test stainless steels for the properties of the passive layer and not metal
release. The material under consideration is tested in an electrochemical test. For verification of the
correct performance of the test protocol, the test is also performed in parallel on material 1.4404 which
is passive in contact with drinking water but shows a clear pitting potential under the conditions of this
test.
The test method is also applicable to alloys having a passive behaviour comparable to that of stainless
steels.
This test is terminated when the pitting potential of the material or the break-through potential is
reached.
With respect to the potential adverse effects on the quality of water intended for human consumption
caused by metallic materials, attention is drawn to the fact that the relevant national regulations remain
in force until the adoption of verifiable European acceptance criteria. Water intended for human
consumption is hereafter referred to as “drinking water” and means the same as the definition given in
Article 2(1) of the Council Directive 98/83/EC on the quality of water intended for human consumption.
This document describes the method to evaluate the passive behaviour of stainless steels and other
alloys in contact with water. The passive layer is the cause for the negligible release of metal ions from
stainless steels and other alloys into the drinking water.

1 Scope
This document specifies a procedure to evaluate the passive behaviour of stainless steels and other
passive alloys used in products intended to come into contact with drinking water.
The passive state is the reason why no r
...