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)

This International Standard defines an accelerated corrosion test method to be used in assessing the corrosion resistance of metals in environments where there is a significant influence of chloride ions, mainly as sodium chloride from a marine source or road de-icing salt. This International Standard specifies the test apparatus and test procedure to be used in conducting the accelerated corrosion test to simulate, in a very controlled way, atmospheric corrosion conditions. In this International Standard, the term "metal" includes metallic materials with or without corrosion protection. The accelerated laboratory corrosion test applies to - metals and their alloys; - metallic coatings (anodic and cathodic); - chemical conversion coatings; - organic coatings on metals. The method is especially suitable for comparative testing in the optimization of surface treatment systems.

Korrosion von Metallen und Legierungen - Korrosion in künstlicher Atmosphäre - Schnellkorrosionsprüfungen unter zyklischer Einwirkung von Feuchte und intermittierendem Versprühen einer Salzlösung unter kontrollierten Bedingungen (ISO 16701:2003)

In dieser Internationalen Norm wird eine Schnellkorrosionsprüfung festgelegt, die zur Beurteilung der Korrosionsbeständigkeit von Metallen in Umgebungen angewendet wird, in denen Chloridionen, hauptsächlich als Natriumchlorid aus maritimen Quellen oder aus Straßenenteisungssalzen, einen signifikanten Einfluss ausüben.
In dieser Internationalen Norm werden auch die bei der Schnellkorrosionsprüfung anzuwendenden Prüfgeräte und Prüfverfahren festgelegt, um die atmosphärischen Korrosionsbedingungen unter gut kontrollierbaren Bedingungen zu simulieren.
Im Rahmen dieser Internationalen Norm schließt die Benennung - Metall - metallische Werkstoffe mit oder ohne Korrosionsschutz ein.
Die Schnellkorrosionsprüfung im Laboratorium gilt für:
   Metalle und ihre Legierungen;
   (anodische und kathodische) Metallüberzüge;
   chemische Umwandlungsschichten;
   organische Beschichtungen auf metallischen Werkstoffen.
Das Verfahren ist besonders für vergleichende Prüfungen zur Optimierung von Systemen zur Oberflächen¬behandlung geeignet.

Corrosion des métaux et alliages - Corrosion en atmosphere artificielle - Essai de corrosion accélérée comprenant des expositions sous conditions contrôlées a des cycles d'humidité et a des vaporisations intermittentes de solution saline (ISO 16701:2003)

L'ISO 16701:2003 définit une méthode d'essai de corrosion accélérée dont l'utilisation permet d'évaluer la résistance à la corrosion des métaux dans des environnements où l'influence des ions de chlorure, principalement sous la forme de chlorure de sodium provenant d'une source marine ou de sel de déverglaçage, est significative.
L'ISO 16701:2003 spécifie l'appareillage ainsi que le mode opératoire à utiliser lors de l'essai de corrosion accélérée afin de simuler, d'une manière très contrôlée, les conditions de corrosion atmosphérique.
Dans l'ISO 16701:2003, le terme «métal» est utilisé pour désigner tous les matériaux métalliques avec ou sans protection contre la corrosion.
L'essai de corrosion accélérée en laboratoire s'applique
aux métaux et à leurs alliages;
aux revêtements métalliques (anodiques et cathodiques);
aux couches de conversion chimique;
aux revêtements organiques sur métaux.
Cette méthode est particulièrement adaptée aux essais comparatifs pour l'optimisation des systèmes de traitement de surface.

Korozija kovin in zlitin - Korozija v umetni atmosferi - Preskus pospešene korozije z izpostavljanjem nadzorovanim pogojem izmeničnega vlaženja in vmesnim pršenjem slanice (ISO 16701:2003)

General Information

• Status: Withdrawn
• Publication Date: 20-May-2008
• Withdrawal Date: 09-Jul-2015
• ICS: 77.060 - Corrosion of metals
• Technical Committee: IPKZ - Protection of metals against corrosion
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 10-Jul-2015
• Due Date: 02-Aug-2015
• Completion Date: 10-Jul-2015
• Ref Project: 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)

Relations

• Replaced By: 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)
• Effective Date: 01-Sep-2015

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 16701:2008
01-julij-2008
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]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 16701:2003)
Corrosion des métaux et alliages - Corrosion en atmosphere artificielle - Essai de
corrosion accélérée comprenant des expositions sous conditions contrôlées a des cycles
d'humidité et a des vaporisations intermittentes de solution saline (ISO 16701:2003)
Ta slovenski standard je istoveten z: EN ISO 16701:2008
ICS:
77.060 Korozija kovin Corrosion of metals
SIST EN ISO 16701:2008 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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EUROPEAN STANDARD
EN ISO 16701
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2008
ICS 77.060

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 16701:2003)
Corrosion des métaux et alliages - Corrosion en Korrosion von Metallen und Legierungen - Korrosion in
atmosphère artificielle - Essai de corrosion accélérée künstlicher Atmosphäre - Schnellkorrosionsprüfungen unter
comprenant des expositions sous conditions contrôlées à zyklischer Einwirkung von Feuchte und intermittierendem
des cycles d'humidité et à des vaporisations intermittentes Versprühen einer Salzlösung unter kontrollierten
de solution saline (ISO 16701:2003) Bedingungen (ISO 16701:2003)
This European Standard was approved by CEN on 21 March 2008.
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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 16701:2008: E
worldwide for CEN national Members.

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EN ISO 16701:2008 (E)
Contents Page
Foreword.3

2

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EN ISO 16701:2008 (E)
Foreword
The text of ISO 16701:2003 has been prepared by Technical Committee ISO/TC 156 “Corrosion of metals and
alloys” of the International Organization for Standardization (ISO) and has been taken over as EN ISO
16701:2008 by 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 October 2008, and conflicting national standards shall be withdrawn at
the latest by October 2008.
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.
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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 16701:2003 has been approved by CEN as a EN ISO 16701:2008 without any modification.

3

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INTERNATIONAL ISO
STANDARD 16701
First edition
2003-12-01


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 16701:2003(E)
©
ISO 2003

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ISO 16701:2003(E)
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ii © ISO 2003 — All rights reserved

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ISO 16701:2003(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 2003 — All rights reserved iii

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ISO 16701:2003(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 16701 was prepared by Technical Committee ISO/TC 156, Corrosion of metals and alloys.
iv © ISO 2003 — All rights reserved

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ISO 16701:2003(E)
Introduction
[3]
As an alternative to the continuous salt spray test methods of ISO 9227 , intermittent salt spray test methods
may be used. The results of such tests provide a better correlation with the effects of exposure in
environments where there is a significant influence of chloride ions, such as from a marine source or road de-
icing salt.
Accelerated corrosion tests to simulate atmospheric corrosion in such environments should include cyclic
exposure to the following conditions.
a) A wet phase, during which the test object is repeatedly subjected first to a spray of aqueous salt-
containing solution then to a wet stand-by period during which residual wetness remains on the test
object. This sequence provides a prolonged period of continuous exposure to wetness, extending over
several hours.
b) A phase of controlled cyclic humidity conditions, where the test object is subjected to an environment
which alternates between high humidity and comparative dryness.
These two phases should be cycled for an appropriate number of times.
The test method described in this International Standard conforms with these requirements, as follows.
In the first (wet) phase of exposure, the test objects are sprayed for 15 min with a 1 % (mass fraction)
aqueous solution of sodium chloride acidified to pH 4,2, to simulate the rather acidic precipitation present in
industrialized areas, followed by a 1 h 45 min period of wet stand-by. This sequence is repeated three times to
give a total of 6 h exposure to wetness. The whole of this first phase of the test cycle is repeated twice a week.
If spraying is carried out more frequently or a more concentrated solution of sodium chloride is used during
this phase, phenomena may appear that are seldom experienced in the field, e.g. severe diffusion blocking by
red rust or excessive dissolution of zinc.
The major part of the test cycle, however, consists of humidity cycling between the two levels of 95 % RH and
50 % RH at a constant temperature of 35 °C. To simulate the wet phase of humidity cycling, the humidity level
has been set close to the condensation limit, but at a level at which test conditions can be satisfactorily
controlled. Introducing 100 % humidity conditions, inevitably results in loss of control of the amount of salt
deposited on a test object.
The test method described in this International Standard is mainly intended for comparative testing and the
results obtained do not permit far-reaching conclusions on the corrosion resistance of the tested metallic
material under the whole range of environmental conditions within which it may be used. Nevertheless, the
method provides valuable information on the relative performance of materials exposed to salt-contaminated
environments similar to those used in the test. See Annex A.
© ISO 2003 — All rights reserved v

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INTERNATIONAL STANDARD ISO 16701:2003(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 defines an accelerated corrosion test method to be used in assessing the
corrosion resistance of metals in environments where there is a significant influence of chloride ions, mainly
as sodium chloride from a marine source or road de-icing salt.
This International Standard specifies the test apparatus and test procedure to be used in conducting the
accelerated corrosion test to simulate, in a very controlled way, atmospheric corrosion conditions.
In this International Standard, the term “metal” includes metallic materials with or without corrosion protection.
The accelerated laboratory corrosion test applies to
 metals and their alloys;
 metallic coatings (anodic and cathodic);
 chemical conversion coatings;
 organic coatings on metals.
The method is especially suitable for comparative testing in the optimization of surface treatment systems.
2 Normative references
The following referenced documents are indispensable for the application 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.
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 2003 — All rights reserved 1

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ISO 16701:2003(E)
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
3 Reagent
A salt solution, prepared by dissolving a sufficient mass of sodium chloride in distilled or deionized water to a
−1 −1
concentration of 10 g l ± 1 g l . The distilled or deionized water used shall have a conductivity not higher
−1
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 salt) 0,001
Determined by atomic absorption spectro-photometry or other
method with similar accuracy
Nickel (calculated for dry salt) 0,001
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 N 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.
NOTE 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 may 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 B.1 shows a suitable
design of climate chamber.
The humidity and temperature levels of the climate chamber during a test cycle shall be continuously
monitored or regularly checked so that it can be confirmed that the relative hum
...