SIST EN 24624:1997
(Main)Paints and varnishes - Pull-off test (ISO 4624:1978)
Paints and varnishes - Pull-off test (ISO 4624:1978)
Lacke und Anstrichstoffe - Abreißversuch für Haftfähigkeit (ISO 4624:1978)
Peintures et vernis - Essai de traction (ISO 4624:1978)
Barve in laki - Preskušanje adhezije z odtrganjem filma (ISO 4624:1978)
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 24624:1997
01-december-1997
Barve in laki - Preskušanje adhezije z odtrganjem filma (ISO 4624:1978)
Paints and varnishes - Pull-off test (ISO 4624:1978)
Lacke und Anstrichstoffe - Abreißversuch für Haftfähigkeit (ISO 4624:1978)
Peintures et vernis - Essai de traction (ISO 4624:1978)
Ta slovenski standard je istoveten z: EN 24624:1992
ICS:
87.040 Barve in laki Paints and varnishes
SIST EN 24624:1997 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 24624:1997
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SIST EN 24624:1997
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SIST EN 24624:1997
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SIST EN 24624:1997
INTERNATIONAL STANDARD
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.ME)I(L1YHAPO~HAR OPI-AHM3AUMR l-IO CTAH~APTM3A~MM.ORGANlSATlON INTERNATIONALE DE NORMALISATION
Pull-off test for adhesion
Paints and varnishes -
Pein tures et vernis - Essai de traction
First edition - 1978-07-01
Ref. No. IS0 4624-1978 (E)
UDC 667.613 : 620.179.4
tests, tension tests, test equipment.
Descriptors : paints, varnishes,
Price based on 7 pages
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SIST EN 24624:1997
FOREWORD
IS0 (the International Organization for Standardization) is a worldwide federation
of national standards institutes (IS0 member bodies). The work of developing
International Standards is carried out through IS0 technical committees. Every
member body interested in a subject for which a technical committee has been set
up 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.
Draft International Standards adopted by the technical committees are circulated
to the member bodies for approval before their acceptance as International
Standards by the IS0 Council.
International Standard IS0 4624 was developed by Technical Committee
lSO/TC 35, Paints and varnishes, and was circulated to the member bodies in
August 1976.
It has been approved by the member bodies of the following countries :
Germany Poland
Australia
India Portugal
Austria
Iran Romania
Belgium
Israel South Africa, Rep. of
Brazil
Bulgaria Korea, Rep. of Sweden
Canada Mexico Switzerland
Chile Netherlands Turkey
United Kingdom
Czechoslovakia New Zealand
Yugoslavia
Egypt, Arab Rep. of Norway
Peru
France
The member body of the following country expressed disapproval of the document
on technical grounds :
Italy
@ International Organization for Standardization, 1978 l
Printed in Switzerland
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SIST EN 24624:1997
IS0 4624-1978 (E)
INTERNATIONAL STANDARD
Pull-off test for adhesion
Paints and varnishes -
1 SCOPE AND FIELD OF APPLICATION
0 INTRODUCTION
This International Standard specifies methods for carrying
This International Standard is one of a series of standards
dealing with the sampling and testing of paints, varnishes out a pull-off test on a single coating or a multi-coat system
and related products. It should be read in conjunction with of paint, varnish or related product.
IS0 1512, IS0 1513, IS0 1514 and IS0 2808.
The test may be applied using a wide range of substrates.
Different procedures are specified according to whether the
This International Standard specifies a method for assessing
substrate is deformable, for example thin metal, plastics
the adhesion of a single coating or a multi-coat system of
and wood, or rigid, for example thick concrete and metal
paint, varnish or related product by measuring the mini-
plates. For special purposes, the coating may be applied to
mum tensile stress necessary to detach or to rupture the
a test cylinder and, in this case, a method for determina-
coating in a direction perpendicular to the substrate.
tion of the coating thickness shall be agreed between the
interested parties.
The test result is influenced not only by the mechanical
The test result is the minimum tensile stress necessary to
properties of the system under test, but also by the nature
break the weakest interface (adhesive failure) or the weakest
and preparation of the substrate, the method of paint
component (cohesive failure) of the test assembly. Mixed
application, the drying conditions of the coating, tempera-
adhesive/cohesive failures may also occur.
ture, humidity and other factors.
2 REFERENCES
The method of test specified below requires to be com-
pleted, for any particular application, by the following
I SO 1512, Paints and varnishes - Sampling.
supplementary information. This information should be
derived from the national standard or other document for
I SO 1513, Paints and varnishes - Examination and prep-
the product under test or, if appropriate, shall be the
aration of samples for testing.
subject of agreement between the interested parties.
IS0 1514, Paints and varnishes - Standard panels for
testing.
a) Material and surface preparation of test assembly
surface or substrate.
IS0 2808, Paints and varnishes - Determination of film
thickness.
b) Method of application of test coating to the
substrate or test cylinder, if appropriate.
3 APPARATUS
c) Duration and conditions of drying of the coating
3.1 Tensile tester, suitable for carrying out the chosen
(or conditions of stoving and ageing, if applicable)
procedure specified in clause 7. The tensile stress shall be
before testing.
applied in a direction perpendicular to the plane of the
in micrometres, of the dry coating,
d) Thickness,
coated substrate and shall be increased at a substantially
including the method of measurement in accordance
uniform rate, not greater than 1 MPa/s*, such that failure
with IS0 2808, and whether it is a single coating or a
of the test assembly occurs within 90 s. Suitable designs
multi-coat system.
for applying the tensile stress are shown in figures 1 and 2.
e) The adhesive (and mixing ratios, if applicable) and
3.2 Test cylinders, suitable for use with the tensile
curing conditions (see also clause 4).
tester (3.1), steel faced, of diameter 20 mm (unless other-
f) Duration and conditions between assembly and
wise agreed) and of sufficient thickness to ensure freedom
testing.
from distortion during the test. It is recommended that the
length of the test cylinder should be not less than half its
g) Type of pull-off test assembly used (see 7.3).
diameter. The faces shall be machined perpendicular to the
h) Type of tensile tester and diameter of test cylinder. long axis of the cylinder before use.
* 1 MPa/s = 1 MN/m%
1
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SIST EN 24624:1997
IS0 46244978 (E)
Ball joint
;
l/T \
c- Test cylinder
I
i -’
I
I-
Coating
Substrate
FIGURE 1 - Example of a suitable test apparatus for methods specified in 7.3.1 and 7.3.3
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SIST EN 24624:1997
SO 46244978 (E)
Test piece
Coating -
Test cylinder
Bal I -and-sot ket
clidinn inint
Support (suitably
designed to allow
for joint assembly)
I
h\\mm sliding joint
FIGURE 2 - Example of a suitable test apparatus for method specified in 7.3.2
3
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SIST EN 24624:1997
IS0 4624-1978 (E)
5 SAMPLING
3.3 Centring device, for ensuring proper coaxial alignment
of the test assembly during the adhesion process used as
Take a representative sample of the product to be tested
described in 7.3.1 and 7.3.3. A suitable design is shown in
(or of each product in the case of a multi-coat system) as
figure 3.
specified in IS0 1512. Then examine and prepare the
sample for testing as specified in IS0 1513.
3.4 Cutting device, such as a sharp knife, for cutting
through cured adhesive and the paint coating to the
substrate, round the circumference of the test cylinder.
6 TEST SUBSTRATES
4 ADHESIVES
6. ‘i Preparation and coating of test substrate
Special attention is required in selecting suitable adhesives
to be used in the test.
Prepare the specified test substrate in accordance with
IS0 1514 and then coat it by the specified method with the
...
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