SIST EN ISO 4611:2000

SLOVENSKI STANDARD
SIST EN ISO 4611:2000
01-december-2000
Polimerni materiali - Ugotavljanje vplivov vlažne toplote, vodne prhe in slane
meglice (ISO 4611:1987)
Plastics - Determination of the effects of exposure to damp heat, water spray and salt
mist (ISO 4611:1987)
Kunststoffe - Bestimmung des Verhaltens bei Einwirkung von warmfeuchtem Klima,
Sprühwasser und Salznebel (ISO 4611:1987)
Plastiques - Détermination des effets d'une exposition a la chaleur humide, au brouillard
d'eau et au brouillard salin (ISO 4611:1987)
Ta slovenski standard je istoveten z: EN ISO 4611:1999
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
SIST EN ISO 4611:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 4611:2000

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SIST EN ISO 4611:2000

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SIST EN ISO 4611:2000

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SIST EN ISO 4611:2000

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SIST EN ISO 4611:2000

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SIST EN ISO 4611:2000
ISO
INTERNATIONAL STANDÖD
4611
Second edition
1987-12-15
INTERNATIONAL ORGANKATION FOR STANDARDIZATION
ORGANISATION INTERNATIONALE DE NORMALISATION
MEXJJYHAPOAHAR OPl=AHM3Ai#lfl fl0 CTAH(CIAPTl43A~MM
Determination of the effects of exposure
Plastics -
to damp heat, water Spray and salt mist
Determination des effets d’une exposition & Ia chaleur humide, au brouiflard
Plastiques -
d’eau et au brouillard salin
Reference number
ISO 4611: 1987 (E)

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SIST EN ISO 4611:2000
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. Esch 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 patt in the work.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the ISO Council. They are approved in accordance with ISO procedures requiring at
least 75 % approval by the member bodies voting.
. International Standard ISO 4611 was prepared by Technical Committee ISO/TC 61,
Plastics.
This second edition cancels and replaces the first edition (ISO 4611 : 19801, of which it
constitutes a minor revision.
Users should note that all tnternational Standards undergo revision from time to time
and that any reference made herein to any other International Standard implies its
latest edition, unless otherwise stated.
0 International Organization for Standardization, 1987
Printed in Switzerland

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SIST EN ISO 4611:2000
INTERNATIONAL STANDARD ISO 4611 : 1987 (E)
- Determination of the effects of exposure
Plastics
to damp heat, water Spray and salt mist
0 Introduction and have been described by International Standards relevant to
other materials and IEC (International Electrotechnical Commis-
sion) Standards relevant to electrical and electronie com-
0.1 Various test methods are available for the exposure of
ponents. The same equipment and procedures described in
plastics to different aggressive agents acting in a combined and
these Standards tan also be employed for plastics, with ap-
simultaneous fashion, such as natura1 weathering. Other test
propriate care and adjustments.
methods are available for the purpose of a separate evaluation
of the action of individual aggressive agents. Among the latter
0.3 The present International Standard is intended to provide
there are, for example, tests for the resistance to specific
chemicals and to radiations of a definite spectral range. general guidance only, on the choice of suitable equipment and
procedures for obtaining the exposure conditions described
For some applications, it may be desirable to evaluate the above and fd; the preparation of test specimens. lt also only
gives general guidance on the properties to be evaluated.
behaviour of the materials in a hot damp atmosphere just below
Specific details are given in the various ISO and IEC Publica-
the Saturation limit of water vapour, as weil as in the presence
of the liquid Phase. tions.
In these conditions not only water absorption or leaching of For the expression of results, the present International Stan-
dard follows, as far as possible, the same criteria adopted in the
some ingredients of the composition may be observed but also
degradation phenomena due to hydrolysis, exudation of existing test methods -for the exposure to chemicals (see
ISO 175) and to natura1 weathering or artificial light (sec
plasticizers, etc.
ISO 4582).
lt may also be desirable sometimes to evaluate the behaviour of
materials in the presence of a highly corrosive electrolyte, such
0.4 These tests are intended to yield data about the effects of
as a sodium chloride Solution (salt mist), which is the principal
the described exposures on the materials; however, a direct
aggressive agent present in marine environments and of par-
correlation between the experimental results and the behaviour
ticular importante in the case of nautical applications. lt is well
in Service is not to be inferred.
known that sodium chloride has no noticeable action on the
Polymers that are the basic components of plastics, and that
salt solutions, owing to their higher osmotic pressure, are nor-
1 Scope and field of application
mally absorbed by plastics to a lesser degree than pure water,
but it cannot be assumed a priori that they have no action on
1.1 This International Standard specifies the exposure condi-
composite materials, containing fillers, reinforcing components
tions of plastics to
or Pigments, for instance.
- damp heat,
Furthermore, the evaluation of the effect of salt mist tan be
very important for finished or semi-finished articles which,
- water Spray,
while basically consisting of plastic materials, do contain some
-
salt mist,
metallic elements, such as moulded-in inserts, thin laminated
foils, sutface coatings applied by electro-plating or other pro-
and the methods for the evaluation of the Change of some
cedures, or, lastly, metal cores sheathed with plastics by extru-
significant characteristics after given exposure stages.
sion or by dipping in pastes or fluidized-bed powders.
1.2 This International Standard is, in general, suitable for all
0.2 Methods and equipment for obtaining reproducible plastics in the form of Standard test specimens, and finished
articles or Parts thereof.
aggressive environments of the above types are well known
1

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SIST EN ISO 4611:2000
ISO 4611 : 1987 (E)
tioning treatment carried out with the aim of obtaining the
1.3 This International Standard considers separately
methods for the determination of same state of equilibrium with atmospheric humidity as that of
the initial specimens.
-
Change of mass,
-
Change of dimensions and appearance,
4 General test conditions
-
. Change of physical properties.
4.1 Environmental conditions and equipment
2 References
4.1.1 Damp heat
ISO 175, Plastics - Determination of the effects of liquid
The preferred test conditions are those described by the IEC
chemicals including wa ter.
Publications referred to in 4.1 .l .l and 4.1.1.2. Different
temperature and/or humidity conditions may be specified,
ISO 293, Plastics - Compression moulding test specimens of
however, in the relevant product specifications or by agree-
thermoplas tic ma terials.
ment ‘between the interested Parties.
ISO 294, Plastics - lnjection moulding test specimens of
thermoplastic ma terials. 4.1 .l .l Steady state test
ISO 295, Plastics - Compression moulding test specimens of A suitable test method is specified in IEC Publication 68-2-3.
thermosetting ma terials.
The following conditions are specified :
ISO 2557-1, Plastics
- Amorphous thermoplastic moulding
ma terials
- Preparation of test specimens with a defined level Temperature: 40 + 2 OC
of shrinkage -
Part 1: Test specimens in the form of
parallelepipedic bars flnjection moulding and compression Relative humidity : 93 ‘$ %
( 1
moulding).
4.1 .1.2 Cyclic test
ISO 2557-2, Plastics - Amorphous thermoplastics - Prepara-
tion of test specimens with a specified reversion - Part 2:
If a cyclic test is required, the conditions specified in IEC
Pla tes.
Publication 68-2-30 tan be adopted.
ISO 2818, Plastics - Preparation of test specimens b y machin-
This Publication specifies 12 h + 12 h cycles with temperature
ing.
Change from :
I S 0 3205, Pre ferred tes t tempera tures.
25 + 3OC
ISO 3768, Metallic coatings - Neutral salt Spray test (NSS
to a) 40 + 2 OC
tes tJ.
b) 55 + 2 OC
ISO 4532, Plastics - Determination of changes in colour and
Variation in properties after exposure to daylight under glass,
Relative humidity is maintained at (93 + 3) % at the higher
na tural wea thering or artificial ligh t.
temperature and not less than 95 % during the rest of the
cycle.
IEC Publication 68, Basic environmental testing procedures:
NOTE - For composite temperaturel humidity cycles, with the addi-
68-2-3, Test Ca: Damp heat, steady state.
tion of a number of excursions to sub-zero temperatures, some
guidance tan be found in IEC Publication 68-2-38.
69-2-11, Test Ka: Salt mist.
4.1.2 Water Spray
68-2-30, Test Db: Damp heat, cyclic (12 + 12-hour cycle).
The main differente between this exposure condition and that
68-2-30, Test Z/AD: Composite temperature/humidity
for damp heatkteady state (sec 4.1.1) is the constant presence
c yclic test.
of the liquid Phase, in the form of small water droplets.
Suitable equipment’ for obtaining these conditions is substan-
tially identical to that for the salt mist exposure (see 4.1.3) and
3 Principle
is described in the relevant specifications.
Determination of one or more properties before and after given
Distilled or deionized water, having a pH between 6 and 7, shall
periods of exposure in the specified environmental conditions,
be used instead of the salt Solution.
and Observation of any Change in appearance. If required, the
determination of one or more proper-Ges may be carried out
The temperature in the test enclosure shall be 40 + 2 OC.
after exposure and a subsequent drying treatment or a recondi-
2

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SIST EN ISO 4611:2000
ISO 4611 : 1987 (E)
4.1.3 Salt mist b) after the exposure and subsequent drying or recon-
ditioning
Suitable equipment and procedure for the exposure to salt mist
The first procedure shall be used when it is required to know
(or salt Spray) are described in ISO 3768.
the state of the material while it still contains the amount of
water it had absorbed by the end of the exposure. The second
The general operating conditions are as follows:
procedure shall be used when it is required to determine the.
changes in properties of the material as a result of the exposure
Temperature inside the cabinet . . . . . . . . . . . . . . . 35 + 2 OC
only. In the case of reconditioning, the specimens shall be
brought back, as far as possible, to the same state as the initial
Sodium chloride Solution :
state before exposure with regard to equilibrium with atmos-
-
concentration. . . . . . . . . . . . . . . . . . . . . . . 50 rfr 5 g/l
pheric humidity (see 4.4).
- pH . . . . . .u. 6,5to7,2
4.51 Test after exposure only
The Solution is prepared by dissolving sodium chloride of
recognized analytical grade in distilled or deionized watet=.
After rinsing with distilled or deionized water, if necessary, and
wiping dry, the exposed specimens shall be brought to
The purity requirements are specified in ISO 3768.
23 I!I 2 OC in a closed Container; usually 4 h are sufficient for
this purpose.
Quantity of “mist” collected over a period of 24 h on a
horizontal collecting area of 8 000 mm* . . . . . . . . 1 to 2 ml/h
4.5.2 Test after exposure and drying or reconditioning
These conditions comply also with IEC Publication 68-2-11.
After rinsing and wiping dry, the specimens shall be dried or
reconditioned to equilibrium with the same atmospheric cond-
NOTE - In this test, the 35 OC temperature value has been retained,
itions as before the exposure (see 4.4), taking due account of
even though this value is not included among those recommended in
the procedures described in A.3.1 and A.3.2 of the annex.
ISO 3205, because it is specified in the ISO 3768 test referred to and by
Unless otherwise specified in the relevant product Standard or
the majority of existing national Standards.
agreed upon between the interested Parties, the specimens
shall be dried in an oven at 50 + 2 OC for 24 h and cooled to
4.2 Duration of tests
23 + 2 OC in a desiccator.
;
The test duration shall be as specified in the relevant Standard
or as agreed upon by the interested Parties, with reference to
5 Change of mass
the intended application.
lt is recommended that the time periods be Chosen from the
5.1 G
...