SIST EN ISO 16701:2015

Corrosion of metals and alloys - Corrosion in artificial atmosphere - Accelerated corrosion test involving exposure under controlled conditions of humidity cycling and intermittent spraying of a salt solution (ISO 16701:2015)

This International Standard specifies the test method, the reagents, and the procedure to be used in an
accelerated atmospheric corrosion test constituting a 6 h exposure to a slightly acidified solution of 1 %
NaCl twice weekly, followed by a condition of controlled humidity cycling between 95 % RH and 50 %
RH at a constant temperature of 35 °C.
This International Standard does not specify the dimensions of the tests specimens, the exposure period
to be used for a particular product, or the interpretation of the results. Such details are provided in the
appropriate product specifications.
The accelerated laboratory corrosion test applies to
— metals and their alloys,
— metallic coatings (anodic or cathodic),
— chemical conversion coatings, and
— organic coatings on metallic materials.
NOTE 1 If testing low-alloy stainless steels, especially austenitic grades, according to this International
Standard, there is a risk of receiving exaggerated pitting, not representative for most service environments.
NOTE 2 This International Standard is not suitable for testing of wax and oil based rust protection agents, due
to the constantly elevated temperature condition of the test.

Korrosion von Metallen und Legierungen - Korrosion in künstlicher Atmosphäre - Beschleunigte Korrosionsprüfungen unter zyklischer Einwirkung von Feuchte und intermittierendem Versprühen einer Salzlösung unter kontrollierten Bedingungen (ISO 16701:2015)

Diese Internationale Norm legt das Prüfverfahren, die Reagenzien und die Durchführung für eine beschleunigte atmosphärische Korrosionsprüfung fest; diese Prüfung besteht aus einer 6 stündigen Beanspruchung durch eine leicht gesäuerte Lösung von 1 % NaCl zwei Mal wöchentlich und einer anschließenden Phase mit kontrollierter Luftfeuchte zwischen 95 % relativer Luftfeuchte und 50 % relativer Luftfeuchte bei einer konstanten Temperatur von 35 °C.
Diese Internationale Norm legt keine Probekörpermaße, keine für ein spezielles Produkt anzuwendende Beanspruchungs¬dauer oder die Bewertung der Ergebnisse fest. Derartige Einzelheiten sind in den entsprechenden Produktspezifikationen enthalten.
Die beschleunigte Korrosionsprüfung im Laboratorium gilt für:
   Metalle und deren Legierungen;
   metallische Überzüge (anodische und kathodische);
   chemische Umwandlungsschichten und
   organische Beschichtungen auf metallischen Werkstoffen.
ANMERKUNG 1   Bei der Prüfung von niedriglegierten Stählen, besonders austenitischer Stähle, besteht nach dieser Internationalen Norm eine Gefahr von übermäßigem Lochfraß, der für die meisten Einsatzumgebungen nicht repräsentativ ist.
ANMERKUNG 2   Diese Internationale Norm ist aufgrund der konstant erhöhten Temperatur nicht geeignet für die Prüfung von wachs- und ölbasierten Rostschutzmitteln.

Corrosion des métaux et alliages - Corrosion en Atmosphäre artifizielle - Essai de Korrosion accélérée comprenant des expositions sous conditions contrôlées à des cycles d'humidité et à des vaporisations intermittentes de solution saline (ISO 16701:2015)

L'ISO 16701 :2015 spécifie la méthode d'essai, les réactifs et le mode opératoire à utiliser dans un essai de corrosion atmosphérique accélérée consistant en une exposition de 6 h, deux fois par semaine, à une solution légèrement acidifiée de 1 % de NaCl, suivie de cycles d'humidité contrôlés entre 95 % HR et 50 % de HR à une température constante de 35 °C.
La présente Norme internationale ne spécifie pas les dimensions des éprouvettes, la durée d'exposition à utiliser pour un produit donné, ni l'interprétation des résultats. De tels détails sont fournis dans les spécifications de produit appropriées.
L'essai de corrosion accélérée en laboratoire s'applique aux métaux et à leurs alliages, aux revêtements métalliques (anodiques ou cathodiques), aux revêtements de conversion chimique, et aux revêtements organiques sur des matériaux métalliques.

Korozija kovin in zlitin - Korozija v umetni atmosferi - Preskus pospešene korozije z izpostavljanjem nadzorovanim pogojem izmeničnega vlaženja in vmesnim pršenjem slanice (ISO 16701:2015)

Ta mednarodni standard določa preskusno metodo, reagente in postopek za izvajanje preskusa pospešene atmosferske korozije, ki zajema šesturno izpostavljenost rahlo nakisani raztopini 1 % NaCl dvakrat tedensko, ki mu sledi pogoj izmeničnega vlaženja med 95 % relativne vlažnosti in 50 % relativne vlažnosti pri stalni temperaturi 35 °C.
Ta mednarodni standard ne določa dimenzij preskušancev, časa izpostavljenosti za določen proizvod ali razlage rezultatov. Te podobnosti so navedene v ustreznih specifikacijah proizvodov.
Poskus pospešene laboratorijske korozije se uporablja za
– kovine in njihove zlitine,
– kovinske prevleke (anodne ali katodne),
– kemijsko-reakcijske prevleke in
– organske prevleke na kovinskih materialih.
OPOMBA 1: Če se preskušajo malolegirana nerjavna jekla, zlasti avstentitnih razredov, v skladu s tem mednarodnim standardom, obstaja tveganje za sprejem pretiranega jamičenja, ki ni reprezentativno za večino storitvenih okolij.
OPOMBA 2: Ta mednarodni standard ni ustrezen za preskušanje sredstev za zaščito proti rji na podlagi voska in olja, in sicer zaradi pogoja stalno dvignjene temperature v okviru preskusa.

General Information

• Status: Published
• Publication Date: 10-Aug-2015
• ICS: 77.060 - Corrosion of metals
• Technical Committee: IPKZ - Protection of metals against corrosion
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 10-Jul-2015
• Due Date: 14-Sep-2015
• Completion Date: 11-Aug-2015
• Ref Project: EN ISO 16701:2015 - Corrosion of metals and alloys - Corrosion in artificial atmosphere - Accelerated corrosion test involving exposure under controlled conditions of humidity cycling and intermittent spraying of a salt solution (ISO 16701:2015, Corrected version 2018-10)

Relations

• Replaces: SIST EN ISO 16701:2008 - Corrosion of metals and alloys - Corrosion in artificial atmosphere - Accelerated corrosion test involving exposure under controlled conditions of humidity cycling and intermittent spraying of a salt solution (ISO 16701:2003)
• Effective Date: 01-Sep-2015

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 16701:2015
01-september-2015
1DGRPHãþD
SIST EN ISO 16701:2008
.RUR]LMDNRYLQLQ]OLWLQ.RUR]LMDYXPHWQLDWPRVIHUL3UHVNXVSRVSHãHQHNRUR]LMH
]L]SRVWDYOMDQMHPQDG]RURYDQLPSRJRMHPL]PHQLþQHJDYODåHQMDLQYPHVQLP
SUãHQMHPVODQLFH,62
Corrosion of metals and alloys - Corrosion in artificial atmosphere - Accelerated
corrosion test involving exposure under controlled conditions of humidity cycling and
intermittent spraying of a salt solution (ISO 16701:2015)
Korrosion von Metallen und Legierungen - Korrosion in künstlicher Atmosphäre -
Beschleunigte Korrosionsprüfungen unter zyklischer Einwirkung von Feuchte und
intermittierendem Versprühen einer Salzlösung unter kontrollierten Bedingungen (ISO
16701:2015)
Corrosion des métaux et alliages - Corrosion en Atmosphäre artifizielle - Essai de
Korrosion accélérée comprenant des expositions sous conditions contrôlées à des
cycles d'humidité et à des vaporisations intermittentes de solution saline (ISO
16701:2015)
Ta slovenski standard je istoveten z: EN ISO 16701:2015
ICS:
77.060 Korozija kovin Corrosion of metals
SIST EN ISO 16701:2015 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 16701:2015

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SIST EN ISO 16701:2015

EUROPEAN STANDARD
EN ISO 16701

NORME EUROPÉENNE

EUROPÄISCHE NORM
May 2015
ICS 77.060 Supersedes EN ISO 16701:2008
English Version
Corrosion of metals and alloys - Corrosion in artificial
atmosphere - Accelerated corrosion test involving exposure
under controlled conditions of humidity cycling and intermittent
spraying of a salt solution (ISO 16701:2015)
Corrosion des métaux et alliages - Corrosion en Korrosion von Metallen und Legierungen - Korrosion in
atmosphère artificielle - Essai de corrosion accélérée künstlicher Atmosphäre - Beschleunigte
comprenant des expositions sous conditions contrôlées à Korrosionsprüfungen unter zyklischer Einwirkung von
des cycles d'humidité et à des vaporisations intermittentes Feuchte und intermittierendem Versprühen einer
de solution saline (ISO 16701:2015) Salzlösung unter kontrollierten Bedingungen (ISO
16701:2015)
This European Standard was approved by CEN on 16 April 2015.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, 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: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 16701:2015 E
worldwide for CEN national Members.

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SIST EN ISO 16701:2015
EN ISO 16701:2015 (E)
Contents Page
Foreword .3

2

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SIST EN ISO 16701:2015
EN ISO 16701:2015 (E)
Foreword
This document (EN ISO 16701:2015) has been prepared by Technical Committee ISO/TC 156 “Corrosion of
metals and alloys” in collaboration with Technical Committee CEN/TC 262 “Metallic and other inorganic
coatings” the secretariat of which is held by BSI.
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 2015, and conflicting national standards shall be withdrawn
at the latest by November 2015.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 16701:2008.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 16701:2015 has been approved by CEN as EN ISO 16701:2015 without any modification.
3

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SIST EN ISO 16701:2015

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SIST EN ISO 16701:2015
INTERNATIONAL ISO
STANDARD 16701
Second edition
2015-05-15
Corrosion of metals and alloys —
Corrosion in artificial atmosphere —
Accelerated corrosion test involving
exposure under controlled conditions
of humidity cycling and intermittent
spraying of a salt solution
Corrosion des métaux et alliages — Corrosion en atmosphère
artificielle — Essai de corrosion accélérée comprenant des
expositions sous conditions contrôlées à des cycles d’humidité et à des
vaporisations intermittentes de solution saline
Reference number
ISO 16701:2015(E)
©
ISO 2015

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SIST EN ISO 16701:2015
ISO 16701:2015(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2015, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2015 – All rights reserved

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SIST EN ISO 16701:2015
ISO 16701:2015(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Reagent . 2
4 Apparatus . 2
4.1 Climate chamber . 2
4.2 Spraying device . 3
4.3 System for forced drying . 3
5 Test objects . 3
6 Procedure. 4
6.1 Arrangement of the test objects . 4
6.2 Exposure conditions of test cycle . 4
6.3 Duration of test . 6
6.4 Treatment of test objects after test . 6
7 Evaluation of results . 6
8 Test report . 7
Annex A (informative) Recommended periods of testing. 8
Annex B (informative) Suitable design of test apparatus with spraying device .9
Annex C (informative) Method for evaluation of corrosivity of test .11
Bibliography .13
© ISO 2015 – All rights reserved iii

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SIST EN ISO 16701:2015
ISO 16701:2015(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 156, Corrosion of metals and alloys.
This second edition cancels and replaces the first edition (ISO 16701:2003), of which it constitutes a
minor revision.
iv © ISO 2015 – All rights reserved

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SIST EN ISO 16701:2015
ISO 16701:2015(E)

Introduction
Atmospheric corrosion of metallic materials, with or without corrosion protection, is influenced by
many environmental factors, the importance of which might vary with the type of metallic material
and with the type of environment. It is therefore not possible to design a laboratory corrosion test in
such a way that the full complexity of real in-service conditions are taken into account. Acceleration
(forced conditions) as such can also have a negative impact on the correlation to field performance.
Nevertheless, tests with humidity cycling and only intermittent exposure to salt solution will generally
provide a better correlation to field performance than tests using continuous salt spray.
This International Standard was developed in the automotive context, where the major contributor to
corrosion is the use of winter time de-icing road salt in cool/cold temperate areas around the world, here
as sodium chloride compounds acting in cyclic humidity conditions. The test procedure is moderately
forced by humidity and salt and intended to be applicable for quality assurance of the metals and
corrosion protections typically encountered in motor vehicles. The method can have relevance also
in other areas of application, provided representing similar climatic conditions with an influence of
sodium chloride compounds.
© ISO 2015 – All rights reserved v

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SIST EN ISO 16701:2015

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SIST EN ISO 16701:2015
INTERNATIONAL STANDARD ISO 16701:2015(E)
Corrosion of metals and alloys — Corrosion in artificial
atmosphere — Accelerated corrosion test involving
exposure under controlled conditions of humidity cycling
and intermittent spraying of a salt solution
1 Scope
This International Standard specifies the test method, the reagents, and the procedure to be used in an
accelerated atmospheric corrosion test constituting a 6 h exposure to a slightly acidified solution of 1 %
NaCl twice weekly, followed by a condition of controlled humidity cycling between 95 % RH and 50 %
RH at a constant temperature of 35 °C.
This International Standard does not specify the dimensions of the tests specimens, the exposure period
to be used for a particular product, or the interpretation of the results. Such details are provided in the
appropriate product specifications.
The accelerated laboratory corrosion test applies to
— metals and their alloys,
— metallic coatings (anodic or cathodic),
— chemical conversion coatings, and
— organic coatings on metallic materials.
NOTE 1 If testing low-alloy stainless steels, especially austenitic grades, according to this International
Standard, there is a risk of receiving exaggerated pitting, not representative for most service environments.
NOTE 2 This International Standard is not suitable for testing of wax and oil based rust protection agents, due
to the constantly elevated temperature condition of the test.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 4628-1, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity
and size of defects, and of intensity of uniform changes in appearance — Part 1: General introduction and
designation system
ISO 4628-2, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and
size of defects, and of intensity of uniform changes in appearance — Part 2: Assessment of degree of blistering
ISO 4628-4, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and
size of defects, and of intensity of uniform changes in appearance — Part 4: Assessment of degree of cracking
ISO 4628-5, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and
size of defects, and of intensity of uniform changes in appearance — Part 5: Assessment of degree of flaking
ISO 8407, Corrosion of metals and alloys — Removal of corrosion products from corrosion test specimens
ISO 10289, Methods for corrosion testing of metallic and other inorganic coatings on metallic substrates —
Rating of test specimens and manufactured articles subjected to corrosion tests
© ISO 2015 – All rights reserved 1

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SIST EN ISO 16701:2015
ISO 16701:2015(E)

3 Reagent
A salt solution, prepared by dissolving a sufficient mass of sodium chloride in distilled or deionized water
−1 −1
to a concentration of 10 g l ± 1 g l . The distilled or deionized water used shall have a conductivity not
−1
higher than 2 mS m at 25 °C ± 2 °C.
The maximum permissible amounts of impurities in the sodium chloride are given in Table 1.
Table 1 — Maximum permissible amounts of impurities in the sodium chloride as calculated for
dry salt
Maximum mass
fraction of
Impurity Note
impurity
%
Copper (calculated for dry
0,001
salt)
Determined by atomic absorption spectro-photome-
try or other method with similar accuracy
Nickel (calculated for dry
0,001
salt)
Sodium iodide 0,1
Total 0,5
Check the pH of the salt solution by using potentiometric measurement at 25 °C ± 2 °C. Finely adjust the
pH of the salt solution to a value of 4,2 ± 0,1 by standard addition of a diluted sulphuric acid solution (e.g.
1 ml of 0,05 mol/L H SO is added to 1 l of salt solution).
2 4
4 Apparatus
4.1 Climate chamber
The climate chamber shall be designed so that the following test conditions can be obtained, controlled
and monitored during the test.
An instantaneous maximum deviation from set relative humidity value of ±4 % in the range from 50 % to
95 % at 35 °C, which corresponds to a temperature accuracy requirement of ±0,8 °C at that temperature.
For the mean value in relative humidity during a period of constant climatic conditions 7 h to 8 h an
accuracy of ±2 % shall apply, corresponding to temperature accuracy requirement of in this case ±0,4 °C.
To meet the temperature and humidity accuracy requirements, the climate chamber should be equipped
with means for efficient circulation of air to provide for small temperature and humidity variations in
the chamber. Sufficient insulation of the chamber walls and lids are required in order to avoid excessive
condensation on these surfaces.
The climate chamber shall also be designed so that the relative humidity can be changed linearly with
respect to time from 95 % to 50 % within 2 h and back from 50 % to 95 % also within 2 h. Figure
...