EN ISO 4541:1994
(Main)Metallic and other non-organic coatings - Corrodkote corrosion test (CORR test) (ISO 4541:1978)
Metallic and other non-organic coatings - Corrodkote corrosion test (CORR test) (ISO 4541:1978)
Specifies the reagent, the apparatus and the procedure for assessment of the quality of metallic and related coatings by the Corrodkode procedure. The method is primarily applicable to copper-nickel-chromium or nickel-chromium electroplated parts.
Metallische und andere anorganische Überzüge - Corrodkote-Korrosionsprüfung (CORR-Test) (ISO 4541:1978)
Diese internationale Norm beschreibt die Chemikalien, die Prüfeinrichtung und das Verfahren für die Prüfung der Qualität von metallischen und ähnlichen Schichten nach dem Corrodkote-Verfahren. Die Methode ist in erster Linie auf Teile mit Kupfer-Nickel-Chrom- oder Nickel-Chrom-Überzügen anwendbar.
Revêtements métalliques et autres revêtements non organiques - Essai de corrosion Corrodkote (Essai CORR) (ISO 4541:1978)
La présente Norme internationale spécifie le réactif, l'appareillage et le mode opératoire pour le contrôle de la qualité des revêtements métalliques et autres revêtements non organiques, par la méthode Corrodkote. La méthode est avant tout applicable aux éléments ayant reçu un dépôt électrolytique de cuivre-nickel-chrome ou de nickel-chrome.
Kovinske in druge anorganske prevleke – Korozijski preskus Corrodkote (preskus CORR) (ISO 4541:1978)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-oktober-1999
Kovinske in druge anorganske prevleke – Korozijski preskus Corrodkote (preskus
CORR) (ISO 4541:1978)
Metallic and other non-organic coatings - Corrodkote corrosion test (CORR test) (ISO
4541:1978)
Metallische und andere anorganische Überzüge - Corrodkote-Korrosionsprüfung (CORR
-Test) (ISO 4541:1978)
Revetements métalliques et autres revetements non organiques - Essai de corrosion
Corrodkote (Essai CORR) (ISO 4541:1978)
Ta slovenski standard je istoveten z: EN ISO 4541:1994
ICS:
25.220.40 Kovinske prevleke Metallic coatings
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
INTERNATIONAL STANDARD
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION*ME>KLIYHAPOflHAR OPl-AHM3AUklfl fl0 CTAH~APTkl3AL(MM.ORGANISATION INTERNATIONALE DE NORMALISATION
Metallic and other non-organic coatings - Corrodkote
corrosion test (COR R test)
Rev&emen ts mballiques et autres revhemen ts non organiques -
Essai de corrosion Corrodko te
(Essai CO R R)
First edition - 1978-06-15
UDC 620.193.4
Ref. No. ISO 4541-1978 (E)
Descriptors : metal coatings, chromium coatings, decorative coatings, corrosion tests, corrodkote tests.
Price based on 3 pages
FOREWORD
ISO (the International Organization for Standardization) is a worldwide federation
of national Standards institutes (ISO member bodies). The work of developing
International Standards is carried out through ISO 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.
It has been approved by the member bodies of the following countries :
Austral ia I taly Spain
Austria Japan Sweden
Bulgaria Korea, Rep. of Switzerland
Czechoslovakia Mexico Turkey
France Philippines United Kingdom
Germany Poland U.S.A.
Hungary Portugal U.S.S.R.
India Romania Yugoslavia
Israel South Africa, Rep. of
No member body expressed disapproval of the document.
63 international Organization for Standardkation, 1978 l
Printed in Switzerland
ISO 4541-1978 (E)
INTERNATIONAL STANDARD
Metallic and other non-organic coatings - Corrodkote
corrosion test (COR R test)
water and stirring into the Solution 30,O g of water-washed
0 INTRODUCTION
ceramic grade kaolin. Mix the slurry thoroughly with a
In many instances, there is no direct relation between
glass stirring rod and allow it to stand for about 2 min so
the results of an accelerated corrosion test and the resist-
that the kaolin becomes saturated. Mix the slurry thor-
ante to corrosion in other media, because several factors
oughly with a glass stirring rod just before using.
which influence the progress of corrosion, such as the
formation of protective films, vary greatly with the
NOTES
conditions encountered. The results obtained in the test
1 An alternative method of preparing the Corrodkote slurry is
should not, therefore, be regarded as a direct guide to the
as follows : Weigh 2,50 g of copper( II) nitrate trihydrate
corrosion resistance of the tested materials in all environ- [Cu(N0&.3H20] and dilute with distilled water to the mark in
a 500 ml one-mark volumetric flask. Weigh 2,50 g of iron(lll)
ments where these materials may be used. Furthermore,
chloride hexahydrate (FeC13.6H20), and dilute with distilled water
Performance of different materials in the test cannot always
to the mark in a 500 ml one-mark volumetric flask. Weigh 50,O g
be taken as a direct guide to the relative corrosion resist-
of ammonium chloride (NH&I) and dilute with distilled water
ante of these materials in Service. to the mark in a 500 ml one-mark volumetric flask. Then transfer
exactly 7,0 ml of the copper(lI) nitrate Solution, 33,0 ml of the
iron(lll) chloride Solution and IO,0 ml of the ammonium chloride
Solution to a beaker and add 30,O g of kaolin. Stir with a glass
1 SCOPE AND FIELD OF APPLICATION
stirring rod.
This International Standard specifies the reagent, the
2 Keep the iron(l II) chloride Solution in the dark in a flask fitted
apparatus and the procedure for assessment of the quality
with a rubber or glass stopper. The iron(l II) chloride Solution shall
not be more than 2 weeks Old, since older solutions become
of metallic and related coatings by the Corrodkote
unstable.
procedure.
The method is primarily applicable to copper-nickel-
chromium or nickel-chromium electroplated Parts.
5 APPARATUS
5.1 The apparatus shall consist of a humidity chamber,
2 REFERENCES
specimen supports, Provision for heating the chamber and
Provision for air circulation in the chamber.
ISO 1462, Metallic coatings - Coatings other than those
anodic to the basis metal - Accelera ted corrosion tes ts -
5.2 The design shall be such that drops of moisture which
Method for evaluation of the results.
might accumulate on the roof or Walls of the chamber, or
ISO 3768, Metallic coatings - Neutral salt Spray fest
on the specimen supports, do not fall on the test specimens.
(NSS tes t).
5.3 The materials of construction shall be such as not
to affect the test.
3 PRINCIPLE
Application of a slurry containing corrosive salts to test
specimens, allowing the slurry to dry, and exposure of the
6 TEST SPECIMENS
coated specimens to a high relative humidity for a specified
period of time.
6.1 Select the type and number of test specimens to be
used, as weil as the criteria for evaluation of the test results,
according to the specification for the coating or products
4 CORRODKOTE SLURRY
being tested.
Prepare the Corrodkote slurry in a glass beaker by dissolv-
6.2 The test specimens may be solvent cleaned Prior to
ing 0,035 g of reagent grade copper(ll) nitrate trihydrate
testing, using
...
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