SIST EN ISO 2819:1999
(Main)Metallic coatings on metallic substrates - Electrodeposited and chemically deposited coatings - Review of methods available for testing adhesion (ISO 2819:1980)
Metallic coatings on metallic substrates - Electrodeposited and chemically deposited coatings - Review of methods available for testing adhesion (ISO 2819:1980)
Is limited to qualitative tests. Table 2 indicates the suitablility of each test for some of the most usual types of metallic coatings. Most of the tests are capable of destroying both the coating and the article being tested. Some destroy the coating only, but it should not be assumed that the articles are undamaged. When particular methods of adhesion testing are included in International Standards for individual coatings, they should be used in preference to the methods described in this International Standard.
Metallische Überzüge auf metallische Grundwerkstoffen - Galvanische und chemische Überzüge - Überblick über Methoden der Haftfestigkeitsprüfung (ISO 2819:1980)
Diese Internationale Norm beschreibt Prüfmethoden für die Haftfestigkeit galvanisch und chemisch abgeschiedener Schutzschichten. Sie ist auf Prüfungen qualitativer Natur geschränkt. In Tabelle 2 wird die Eignung jeder Prüfmethode für einige der gebräuchlichsten Arten der metallischen Überzügegezeigt. Die meisten der beschriebenen Prüfungen können sowohl den Überzug als auch das untersuchte Bauteil zerstören, einige jedoch zerstören nur den Überzug.
Revetements métalliques sur bases métalliques - Dépôts électrolytiques et dépôts par voie chimique - Liste des différentes méthodes d'essai d'adhérence (ISO 2819:1980)
La présente Norme internationale décrit des méthodes de vérification de l'adhérence des dépôts électrolytiques et des dépôts effectués par voie chimique. Elle se limite aux essais de nature qualitative. Le tableau 2 indique les essais appropriés à certains des types les plus fréquents de revêtements métalliques. La plupart des essais décrits sont susceptibles de détruire à la fois le revêtement et la pièce soumise à l'essai, tandis que certains d'entre eux ne détruisent que le revêtement. Même si l'adhérence du revêtement s'avère être satisfaisante sur des pièces non détruites au cours de l'essai, il ne faudra pas en conclure que toutes les pièces sont indemnes après l'essai. Par exemple, l'essai de brunissage (2.1) peut rendre une pièce inacceptable et l'essai de choc thermique (2.12) peut occasionner des modifications inacceptables de la structure métallique. La présente Norme internationale ne décrit pas certains essais mis au point à différentes occasions pour effectuer un mesu
Kovinske prevleke na kovinskih podlagah - Galvansko in kemično nanesene prevleke - Pregled preskusnih metod za preskus adhezivnosti (ISO 2819:1980)
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 2819:1999
01-oktober-1999
.RYLQVNHSUHYOHNHQDNRYLQVNLKSRGODJDK*DOYDQVNRLQNHPLþQRQDQHVHQH
SUHYOHNH3UHJOHGSUHVNXVQLKPHWRG]DSUHVNXVDGKH]LYQRVWL ,62
Metallic coatings on metallic substrates - Electrodeposited and chemically deposited
coatings - Review of methods available for testing adhesion (ISO 2819:1980)
Metallische Überzüge auf metallische Grundwerkstoffen - Galvanische und chemische
Überzüge - Überblick über Methoden der Haftfestigkeitsprüfung (ISO 2819:1980)
Revetements métalliques sur bases métalliques - Dépôts électrolytiques et dépôts par
voie chimique - Liste des différentes méthodes d'essai d'adhérence (ISO 2819:1980)
Ta slovenski standard je istoveten z: EN ISO 2819:1994
ICS:
25.220.40 Kovinske prevleke Metallic coatings
SIST EN ISO 2819:1999 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 2819:1999
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SIST EN ISO 2819:1999
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SIST EN ISO 2819:1999
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SIST EN ISO 2819:1999
International Standard
INTERNATIONAL ORGANIZATION FOR STANDARDIZATlON.MEX,QYHAPO~HAR OPTAHM3AL&lR fl0 CTAH~APTM3A~MM.ORGANlSATlON INTERNATIONALE DE NORMALISATION
Metallic coatings on metallic substrates -
Electrodeposited and chemically deposited coatings -
Review of methods available for testing adhesion
DdpSts 6lectrolytiques et d&p&s par voie chimique - Liste des diffkentes
Revgtements mt?talliques sur bases m&al/iques -
m&hodes d ’essai d ’adhkence
Second edition - 1980-08-01
UDC 669.058 : 620.179.4 Ref. No. IS0 2819-1980 (E)
Descriptors : metal coatings, electrodeposited coatings, adhesion, mechanical tests, quality contra;.
chemical plating, tests, adhesion tests,
Price based on 5 pages
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SIST EN ISO 2819:1999
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 2819 was developed by Technical Committee
ISO/TC 107, Metallic and other non-organic coatings.
It was submitted directly to the IS0 Council, in accordance with clause 5.10.1 of
the Directives for the technical work of ISO. It cancels and replaces the first edition
(i.e. IS0 2819/l-1973), which had been approved by the member bodies of the
following countries :
Sweden
Egypt, Arab Rep. of Italy
Switzerland
France Japan
New Zealand Thailand
Germany, F. R.
Poland Turkey
Hungary
United Kingdom
India Portugal
USSR
Ireland Romania
Israel South Africa, Rep. of
The Member Body of the following country had expressed disapproval of the
document on technical grounds :
Netherlands
0 International Organization for Standardization, 1980 l
Printed in Switzerland
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SIST EN ISO 2819:1999
IS0 2819-1980(E)
INTERNATIONAL STANDARD
Metallic coatings on metallic substrates -
Electrodeposited and chemically deposited coatings -
Review of methods available for testing adhesion
1 SCOPE AND FIELD OF APPLICATION adhesion is indicated by the appearance of a blister which
grows as the rubbing is continued.
This International Standard describes methods of checking
the adhesion of electrodeposited and chemically deposited If the mechanical properties of the coating are poor, the
coatings. It is limited to tests of a qualitative nature. blister may crack and the coating will peel from the basis
Table 2 indicates the suitability of each test for some of metal. This test shall be limited to relatively thin deposits.
the most usual types of metallic coatings. Most of the tests
described are capable of destroying both the coating and
2.2 Ball burnishing test
the article being tested, but some destroy the coating only.
Ball burnishing is frequently used for polishing, but it can
Even if the adhesion of the coating is found to be satis-
be used also to test adhesion. Using a barrel or vibratory
factory on articles not destroyed in testing, it should not be
burnisher with steel balls about 3 mm in diameter and soap
assumed that the articles are undamaged. For example, the
burnishing test (see 2.1) may render an article unacceptable solution as lubricant, it is possible to produce blisters when
and the thermal shock test (see 2.12) may produce un- the adhesion is very poor. The method is suitable for
relatively thin deposits.
acceptable metallurgical changes.
This International Standard does not describe certain tests
2.3 Shot peening test
which have been developed at various times to give a quan-
titative measure of adhesion of metallic coating to a sub-
There are some variations of the principle by which the
strate since such tests require special apparatus and con-
hammering action of iron or steel balls, allowed to fall by
siderable skill in their performance which renders them
gravity or forced by means of a pressure air stream onto the
unsuitable as quality control tests for production parts.
surface to be tested, produces deformation of the deposit.
Some of these quantitative tests may, however, be useful
If the coating is poorly bonded, it will become blistered.
in research and development work.
Usually, the intensity of peening necessary to cause non-
When particular methods of adhesion testing are included
adherent coatings to blister varies with the coating thick-
in International Standards for individual coatings, they ness, thin coatings requiring less than thick coatings.
should be used in preference to the methods described in
One test can be performed using a tube 150 mm long,
this International Standard and should be agreed upon
19 mm internal diameter, as the reservoir for round iron or
beforehand by the supplier and the purchaser.
steel shot (0,75 mm diameter approximately) connected to
a nozzle. Compressed air is brought to the apparatus with a
pressure of 0,07 to 0,21 MPa’ ) and the distances between
nozzle and specimen are 3 to 12 mm.
2 METHODS OF TEST
.Another test, that appears to be the most suitable for
2.1 Burnishing test
checking the adhesion of electroplated coatings of silver
during production of coatings from 100 to 600 pm in
If plated parts are subjected to burnishing in a localized
thickness, is described in the annex and employs a standard
area, the deposit will tend to work-harden and absorb
air-operated cabinet of the type used for shot-peening steel
frictional heat. If the coating is thin, separation of the
parts.
coating from the basis metal as blisters will occur under
these conditions in areas of poor adhesion.
If the silver is poorly bonded, it will extend or flow and
become blistered.
When the shape and size of the part permit, an area of not
more than 6 cm2 of the plated surface should be rubbed
2.4 Peel test
with a smooth implement for about 15 s. A suitable
implement is a steel rod 6 mm in diameter with a smooth
This test is suitable for coatings less than 125 pm thick on
hemispherical end.
substantially flat surfaces. A strip of tinned mild steel or
The pressure shall be sufficient to burnish the coating at
brass, approximately 75 mm long x 10 mm wide x 0,5 mm
every stroke but not so great as to cut the coating. Poor
thick, is bent at right angles 10 mm from one end and the
I) 1 MPa=l MN/m2
1
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SIST EN ISO 2819:1999
IS0 2819-1980(E) ,
appears to be PO separation at the fracture, a sharp chisel
shorter limb soldered flat to the coated surface. A load is
applied to the free limb and normal to the soldered surface. is used to try to raise the coating at the edge. If the coating
The coating will be detached from the substrate if the can be peeled from the edge for an appreciable distance,
adhesion is weaker than the soldered joint. If the adhesion
poor or weak adhesion is indicated. The cutting edge of
of the coating is greater than this, however, failure will
the chisel shall be sharpened prior to each test.
occur in the soldered joint or within the thickness of the
Thinner coatings can be tested by substituting a knife for
coating.
the chisel and light tapping with a hammer may or may not
This method is not widely used because the temperature
be used. The chisel test is not suitable for soft coatings such
reached during the soldering operation might alter the
as zinc or cadmium.
adhesion. Alternatively, the test can be performed using an
adhesive of hard-setting synthetic resin of adequate tensile
2.8 Scribe and grid test
strength in place of solder.
Using a hardened steel scribe which has been ground to a
Another test (the tape test) employs an adhesive cellulose
sharp 30’ point, two parallel lines are scribed at a distance
tape, with an adhesion value of approximately 8 N per
apart of about 2 mm. In scribing the two lines, enough
25 mm width, whose adhesive side is applied to the coating
pressure shall be applied to cut through the coating to the
under test, using a fixed-weight roller, care being taken to
basis metal in a single stroke. If any part of the coating
exclude all air bubbles. After an interval of 10 s, the tape is
between the lines breaks away from the basis metal, the
removed by applying a steady pulling force to the tape,
coating shall be deemed to have failed the test.
perpendicular to the surface of the coating. The adhesion of
One variation of the test is to draw a square with a grid of
the coating shall be such that there is no evidence of
1 mm side and observe whether the coating peels from the
detachment of the coating. This test is particularly used for
basis metal within this area.
testing adhesion of coatings on the conductors and contacts
of printed circuits. Coated conductors shall be tested over
an area of at least 30 mm2.
2.9 Bending test
The bend test consists in bending or flexing the coated
2.5 File test
products. The extent and nature of the distortion will vary
A piece sawn off a coated article is held in a vice and a
with the basis metal, the shape, the nature of the coating
coarse mill file (one set of serrations only) is applied to the
and the relative thickness of the two layers.
cut in such a manner as to attempt to raise the coating. The
The test is usually carried out by hand or with pliers,
file is used in the direction from the basis metal to the
bending the specimen as sharply as possible first to one side
coating at an angle of approximately 45’ to the coated
then to the other, until the specimen breaks. The rate and
surface. No detachment of the coating shall occur. This test
the radius of bending can be controlled using suitable mach-
is not suitable for very thin coatings and for soft coatings
ines. The test produces a shearing stress between the basis
such as zinc or cadmium.
metal and the deposit; if the deposit is ductile, the shearing
force is much reduced because the coating flows and the
2.6 Grinding and sawing tests
basis metal can even break without the coating loosening.
Grind an edge of the coated specimen with a gr
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