EN ISO 10062:1995

SLOVENSKI STANDARD
SIST EN ISO 10062:1999
01-oktober-1999
Korozijski preskusi v umetni atmosferi pri zelo majhnih koncentracijah škodljivih
plinov (ISO 10062:1991)
Corrosion tests in artificial atmosphere at very low concentrations of polluting gas(es)
(ISO 10062:1991)
Korrosionsprüfungen in künstlicher Atmosphäre mit sehr niedrigen Konzentrationen von
Schadgasen (ISO 10062:1991)
Essais de corrosion en atmosphere artificielle a tres basse concentration de gaz polluant
(s) (ISO 10062:1991)
Ta slovenski standard je istoveten z: EN ISO 10062:1995
ICS:
77.060
SIST EN ISO 10062:1999 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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IS0
INTERNATIONAL
STANDARD
10062
First edition
1991-10-15
-____IL--_-------_-__ .- ----.- .---- --- .-_---.
Corrosion tests in artificial atmosphere at very
low concentrations of polluting gas(es)
Essais de corrosion en atmosphh-e artificielle ;i tr& basse concentration
de gaz polluant(s)
_-
-_ _-_-- -------- .-- -----. __- _---_- -_-_- ~-
--__Z
I_---
_ _ _---
_-. - _ _--
Reference number
-. -__
IS0 10062:1991(E)

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IS0 10062:1991(E)
Contents
Page
Scope . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-. 1
1
. . . . . . . . . . . . . . . . . . . . .
Normative references .,.
. . . . . . . . . . . . . . . . .*. 1
Apparatus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
Test methods . . . . . . . . . . . . . . . . . . . . . . . . . . ._. . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . .*. 4
Information to be given in the relevant specification
. , . . . . . . . . . . . . . . . . . . . 4
Expression of results _.,.
................................... 4
Test report .
Annexes
A Specifications for apparatus for corrosion tests in artificial
5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
atmospheres
7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B Bibliography
0 IS0 1991
All rights reserved. No part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without
permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 + CH-1211 Gen&ve 20 l Switzerland
Printed in Switzerland
ii

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IS0 10062:1991(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work
of preparing International Standards is normally carried out through IS0
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, govern-
mental and non-governmental, in liaison with ISO, also take part in the
work. IS0 collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an lnter-
national Standard requires approval by at least 75 % of the member
bodies casting a vote.
International Standard IS0 10062 was prepared by Technical Committee
ISO/TC 156, Corrosion of metals arjd alloys.
It is derived from the work undertaken by IEC Technical Committee
IEC/TC 50 B on climatic testing.
This work resulted in the publication of a technical trend document
Corrosion tests in artificial at-
IEUTD 68-2-60:1990 entitled Tesl Ke -
mosphere at very low concentrations of polluting gas(es).
Annex A forms an integral part of this International Standard. Annex B
is for information only.

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IS0 10062:1991(E)
Introduction
This International Standard is intended to
-
define a general method using atmospheres polluted by one or more
gases at very low concentrations [< IO-6 (by volume)] under speci-
fied conditions of temperature and relative humidity so as to avoid
condensation phenomena during the test;
-
define the test apparatus and procedure required to achieve the best
possible reproducibility;
-
assess performance under test conditions which accelerate cor-
rosion; as knowledge of operating conditions proceeds, more suit-
able pollutants or pollutant mixtures could be used.
iv

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INTERNATIONAL STANDARD IS0 10062:1991(E)
Corrosion tests in artificial atmosphere at very low
concentrations of polluting gas(es)
WARNING - Safety rules for personnel: Handling of the gases used for testing can be hazardous and
must be left to skilled chemists or conducted under their control.
The test equipment must be used and maintained by skilled personnel, not only so that the tests can
be performed correctly, but also because of the hazards to health and safety that are involved.
IS0 554: 1976, Standard atmospheres for conditioning
1 Scope
and/or testing - Specifications.
This International Standard specifies tests which are
IS0 558: 1980, Conditioning and testing - Standard
intended to determine the influence of one or more
atmospheres - Definitions.
flowing polluting gas(es) at concentrations less than
or equal to -6 (by volume) on coated or uncoated
IO
IS0 7384:1986, Corrosion tests in artificial atmos-
metallic material test pieces and/or articles under
phere - General requirements.
determined conditions of temperature and relative
humidity.
IS0 8407:1991, Corrosion of metals and alloys - Re-
moval of corrosion products from corrosion test
These tests apply to
specimens.
-
metals and their alloys;
-
certain metallic coatings (anodic and cathodic);‘)
3 Apparatus
-
certain conversion coatings;l)
Special attention shall be paid to equipment design
-
certain anodic oxide coatings;”
and the choice of construction materials, in order
that the conditions (less than + 1 OC for temperature
-
-
organic coatings on metallic materials.
and & 3 % for relative humidity) are uniformly con-
sistent throughout the working space, able to ensure
no condensation in the test chamber, and are re-
peatable.
2 Normative references
The apparatus shall enable the use, singly or in
The following standards contain provisions which,
mixtures, of polluting gas(es) such as SO,, H,S, Cl,
through reference in this text, constitute provisions
and NO, up to at least the concentration required,
of this International Standard. At the time of publi-
for each qas, by the test method.
c
cation, the editions indicated were valid. All stan-
dards are subject to revision, and parties to The important parameters are
agreements based on this International Standard
-
the materials used for the test chamber and the
are encouraged to investigate the possibility of ap-
’ plying the most recent editions of the standards in- qas handling system;
\
dicated below. Members of IEC and IS0 maintain
_
registers of currently valid International Standards. the geometry of the test chamber;
1) See annex B.

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IS0 10062:1991 (E)
- the rate and pattern of the gas flow;
- Method D
Mixture of pollut- H,S = (0,lO + 0,02)10-6
- the homogeneity of gas mixing;
ing (gases) (by volume) -
= (0,20 + 0,05)10-6
so2
- the incident illumination (see A.1.6).
(by volume) -
= (0,02 + 0,005)10-6
The apparatus shall be constructed according to
C’2
(by volume)-
annex A and shall meet its requirements.
Temperature (25 & 1) “C
Relative humidity
(75 + - 3) %
NOTES
1 Since the corrosivity is different for methods A, B, C
and 0, the results obtained by these methods are not
4 Test methods
comparable.
2 Other methods may be added in the future as required
(e.g. increase in the relative humidity rate).
4.1.2 Test duration
4.1 Test severity
The total period of testing for each test method de-
The test severity, to be given in the relevant specifi-
pends upon the purpose of the test, the nature of the
cation, is defined by
metals and alloys and the means of protection
tested.
- the type, concentration and flow of polluting gas;
Recommended periods of exposure are 24 h - 48 h
- the temperature;
- 96 h - 240 h - 480 h - 720 h and 2 160 h.
- the relative humidity;
4.2 Treatment of the specimens prior to
- the exposure time.
testing (see clause 6)
The relevant specification may require a precon-
ditioning of specimens, for example chemical or
mechan‘ical cleaning of surface.
4.1 .I Suggested test methods
- Method A
4.3 Examination of the specimens prior to
testing
= (0,5 & O,l)lO-6 (by
Polluting gas
so2
volume)
Measurements shall be carried out as required by
the relevant specification (see IS0 7384).
Temperature (25 + I) “C
(75 + 3) %
Relative humidity
4.4 Filling of the test chamber
- Method B
The filling of the chamber by the specimens shall
Polluting gas = (0,lO + 0,02)10-6
*2s
satisfy the following conditions:
(by volume) -
- the total surface, in square centimetres, for thin
Temperature (25 $- 1) “C
flat specimens, shall not exceed the critical level
(75 rf: 3) 5x0
Relative humidity
at which the concentration of polluting gases
would change;
- Method C
Mixture of pollut- so = (0,5 2 O,l)lO-6 (by
- the specimens shall be placed in the working
2
volume)
ing (gases)
space, as defined in the relevant specification.
= (OJO + 0,02)10-6
*2s
Care shall be taken that the specimens are placed
(by volume) -
so that they do not come into contact with one an-
other or with the walls of the chamber, and that they
Temperature (25 rfr 1) “C
do not shield one another from the test atmosphere.
Relative humidity (75 +_ 3) %
2

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IS0 10062:1991 (E)
The specimens shall be distributed uniformly in the The concentration of polluting gas(es) shall be
working space. stabilized in less than ? h.
The test duration shall be measured as indicated in
4.5 Procedure
4.5.1.
4.5.1 Basis for calculation
At the end of the test, the injection of polluting
gas(es) shall be stopped and the specimens shall
451.1 Exposure time: The interval of time elapsed
be maintained in the flow of the damp atmosphere
between the moment when the specimens are in-
without polluting gas(es) for 2 h.
troduced into the test chamber and the end of the
test.
4.5.3 Simplified method
- For the ref
...