Nickel-based alloys - Determination of resistance to intergranular corrosion (ISO 9400:1990)

Includes four methods: iron(III) sulfate - sulfuric acid test, copper - copper-sulfate - sulfuric acid test, hydrochloric acid test and nitric acid test. ISO 9400 defines the term nickel-based alloy. Specifies apparatus, test specimens, procedure and evaluation.

Legierungen auf Nickelbasis - Bestimmung der Beständigkeit gegen interkristalline Korrosion (ISO 9400:1990)

Die vorliegende Internationale Norm legt für Nickelbasislegierungen vier Verfahren zur Bestimmung der Anfälligkeit gegen interkristalline Korrosion fest. Diese Methoden sind nur zur Ermittlung der Empfindlichkeit gegen interkristalline Korrosion unter Laborbedingungen geeignet und eine Übertragbarkeit auf tatsächliche Betriebsbedingungen muß nicht gegeben sein, wenn nicht Betriebs- und Prüfmedium übereinstimmen.

Alliages à base de nickel - Détermination de la résistance à la corrosion intergranulaire (ISO 9400:1990)

La présente Norme internationale prescrit quatre méthodes pour la détermination de la sensibilité des alliages à base de nickel à la corrosion intergranulaire. Ces méthodes ne sont utilisables qu'en laboratoire, et il n'est pas possible d'établir une corrélation directe avec la corrosion intergranulaire en service normal, à moins que le milieu ambiant en service ne soit le même qu'en essai. Les méthodes couvertes sont les suivantes: -- Méthode A: Essai au sulfate de fer(III) et à l'acide sulfurique (section 2). -- Méthode B: Essai au cuivre, au sulfate de cuivre et à l'acide sulfurique à 16 % (section 3). -- Méthode C: Essai à l'acide chlorhydrique (section 4). -- Méthode D: Essai à l'acide nitrique (section 5). La méthode la meilleure à utiliser pour un alliage donné, le choix du traitement de sensibilisation et les critères de réception utilisés pour l'évaluation quelle qu'elle soit, doivent être convenus entre l'acheteur et le vendeur de l'alliage. Les méthodes prescrites dans la présente Norme internationale, à titre indicatif, sont applicables aux alliages à base de nickel employés en milieu corrosif, énumérés dans ISO 6207.

Zlitine na osnovi niklja – Ugotavljanje odpornosti proti interkristalni koroziji (ISO 9400:1990)

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SIST EN ISO 9400:1999
Zlitine na osnovi niklja – Ugotavljanje odpornosti proti interkristalni koroziji (ISO
Nickel-based alloys - Determination of resistance to intergranular corrosion (ISO
Legierungen auf Nickelbasis - Bestimmung der Beständigkeit gegen interkristalline
Korrosion (ISO 9400:1990)
Alliages a base de nickel - Détermination de la résistance a la corrosion intergranulaire
(ISO 9400:1990)
Ta slovenski standard je istoveten z: EN ISO 9400:1995
77.060 Korozija kovin Corrosion of metals
SIST EN ISO 9400:1999 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 9400:1999

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SIST EN ISO 9400:1999

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SIST EN ISO 9400:1999

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SIST EN ISO 9400:1999
First edi tion
----- Pp-__p-I_P-
Nickel-based alloys - Determination of
resistance to intergranular corrosion
Alliages 5 base de nicke1 - D6terniination de la resistance ;i la
in tergranulaire
Reference number
ISO 9400: 199O(E)

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SIST EN ISO 9400:1999
ISO 9400:199O(E)
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 part in the
work. ISO 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 ISO 9400 was prepared by Technical Committee
ISO/TC 156, Corrosion of mefals and alloys.
Annex A of this International Standard is for information only.
0 ISO 1990
All rights reserved. No part of this publication may be reproduced or utilized in any form
or by any means, electronie or mechanical, including photocopying and microfilm, without
Permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-1211 Geneve 20 l Switzerland
Printed in Switzerland

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SIST EN ISO 9400:1999
Nickel-based alloys - Determination of resistance to
intergranular corrosion
Section 1: General
NOTE 1 This definition is consistent with that given in
1.1 Scope
ISO 6372-1123.
This International Standard specifies four methods
for determination of the susceptibility of nickel- 1.3 Apparatus
based alloys to intergranular corrosion.
The recommended apparatus is shown in figure 1.
These methods are for laboratoty testing of suscep-
The cold-finger type of condenser with Standard
tibility only, and a direct correlation with inter-
Erlenmeyer flasks should not be used except for
granular corrosion in actual seivice may not occur
method D.
unless the Service medium is the Same as the test
The following items are required.
The methods covered are as follows:
1.3.1 Four-bulb Allihn or Soxhlet condenser with
45/50 qround glass joint.
- Method A: iron(lll) sulfate - sulfuric acid test
(section 2);
1.3.2 Erlenmeyer flask, capacity 1 dm3, with
45/50 ground glass joint.
- Method B: topper - topper-sulfate - f6 %
sulfuric acid test (section 3);
NOTE 2 The use of round flasks with a heating jacket is
also acceptable.
- Method C: hydrochloric acid test (section 4);
1.3.3 Glass cradle or other equivalent means of
- Method D: nitric acid test (section 5);
specimen support, such as glass hooks or stirrups.
The appropriate method for use with a given alloy,
The cradle should have three or four holes in it, to
the selection of sensitizing treatment, and the ac-
increase circulation of the test Solution around the
ceptance criteria to be used in any evaluation have
specimen (see figure 1).
to be agreed between the buyer and Seller of the
alloy. As a guide, the methods specified in this In-
1.3.4 Boiling Chips to promote uniform boiling and
ternational Standard should be applicable to those
to prevent bumping.
nickel-based alloys used for corrosion Service and
listed in ISO 6207c11.
For method A, these boiling Chips should be made
of pure alundum.
1.3.5 Silicone grease for application to the ground

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