SIST EN ISO 15324:2008
(Main)Corrosion of metals and alloys - Evaluation of stress corrosion cracking by the drop evaporation test (ISO 15324:2000)
Corrosion of metals and alloys - Evaluation of stress corrosion cracking by the drop evaporation test (ISO 15324:2000)
Specifies the procedure for determining the relative resistance of stainless steels and nickel-base alloys to stress corrosion cracking in a sodium chloride drop evaporation system. The method results in a threshold stress to fracture, the magnitude of which can be used to rank the relative performance of different alloys for this environment.
Korrosion von Metallen und Legierungen - Bewertung der Spannungsrisskorrosion mit der Tropfen-Verdampfungsprüfung (ISO 15324:2000)
1.1 Diese Internationale Norm legt für nicht rostende Stähle und Nickelbasislegierungen das Verfahren fest, mit dem die relative Beständigkeit dieser Werkstoffe gegenüber Spannungsrisskorrosion durch Verdampfen von Natriumchloridtropfen zu bestimmen ist.
1.2 Das Verfahren liefert einen kritischen Bruchspannungswert, der zur Klassifizierung des relativen Verhaltens unterschiedlicher Legierungen in der für diese Prüfung verwendeten Umgebung dienen kann.
Corrosion des métaux et alliages - Évaluation de la résistance a la fissuration par corrosion sous contrainte par essai d'évaporation goutte a goutte (ISO 15324:2000)
1.1 La présente Norme internationale spécifie le mode opératoire permettant de déterminer la résistance relative
des aciers inoxydables et des alliages à base de nickel à la fissuration par corrosion sous contrainte dans un système
d'évaporation goutte à goutte de chlorure de sodium.
1.2 La méthode conduit à la détermination d'un seuil de contrainte à rupture dont la valeur peut être utilisée pour
classer le comportement relatif de différents alliages dans cet environnement.
Korozija kovin in zlitin - Vrednotenje pokanja zaradi napetostne korozije s preskusom uparjanja kapelj (ISO 15324:2000)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 15324:2008
01-julij-2008
Korozija kovin in zlitin - Vrednotenje pokanja zaradi napetostne korozije s
preskusom uparjanja kapelj (ISO 15324:2000)
Corrosion of metals and alloys - Evaluation of stress corrosion cracking by the drop
evaporation test (ISO 15324:2000)
Corrosion des métaux et alliages - Évaluation de la résistance a la fissuration par
corrosion sous contrainte par essai d'évaporation goutte a goutte (ISO 15324:2000)
Ta slovenski standard je istoveten z: EN ISO 15324:2008
ICS:
77.060 Korozija kovin Corrosion of metals
SIST EN ISO 15324:2008 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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EUROPEAN STANDARD
EN ISO 15324
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2008
ICS 77.060
English Version
Corrosion of metals and alloys - Evaluation of stress corrosion
cracking by the drop evaporation test (ISO 15324:2000)
Corrosion des métaux et alliages - Évaluation de la Korrosion von Metallen und Legierungen - Bewertung der
résistance à la fissuration par corrosion sous contrainte par Spannungsrisskorrosion mit der Tropfen-
essai d'évaporation goutte à goutte (ISO 15324:2000) Verdampfungsprüfung (ISO 15324:2000)
This European Standard was approved by CEN on 21 March 2008.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
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EUROPÄISCHES KOMITEE FÜR NORMUNG
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© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 15324:2008: E
worldwide for CEN national Members.
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EN ISO 15324:2008 (E)
Contents Page
Foreword.3
2
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EN ISO 15324:2008 (E)
Foreword
The text of ISO 15324:2000 has been prepared by Technical Committee ISO/TC 156 “Corrosion of metals and
alloys” of the International Organization for Standardization (ISO) and has been taken over as EN ISO
15324:2008 by Technical Committee CEN/TC 262 “Metallic and other inorganic coatings” the secretariat of
which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by October 2008, and conflicting national standards shall be withdrawn at
the latest by October 2008.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 15324:2000 has been approved by CEN as a EN ISO 15324:2008 without any modification.
3
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INTERNATIONAL ISO
STANDARD 15324
First edition
2000-12-01
Corrosion of metals and alloys —
Evaluation of stress corrosion cracking by
the drop evaporation test
Corrosion des métaux et alliages — Évaluation de la résistance à la
fissuration par corrosion sous contrainte par essai d'évaporation goutte à
goutte
Reference number
ISO 15324:2000(E)
© ISO 2000
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ISO 15324:2000(E)
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ii ISO 2000 – All rights reserved
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ISO 15324:2000(E)
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 com-
mittees. Each 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, governmental and non-governmental, in liai-
son with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 15324 was prepared by Technical Committee ISO/TC 156, Corrosion of metals and al-
loys.
Annexes A, B and C of this International Standard are for information only.
©
ISO 2000 – All rights reserved iii
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INTERNATIONAL STANDARD ISO 15324:2000(E)
Corrosion of metals and alloys — Evaluation of stress corrosion
cracking by the drop evaporation test
1 Scope
1.1 This International Standard specifies the procedure for determining the relative resistance of stainless steels
and nickel-base alloys to stress corrosion cracking in a sodium chloride drop evaporation system.
1.2 The method results in a threshold stress to fracture, the magnitude of which can be used to rank the relative
performance of different alloys for this environment.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of
this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publica-
tions do not apply. However, parties to agreements based on this International Standard are encouraged to investi-
gate the possibility of applying the most recent editions of the normative documents indicated below. For undated
references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain reg-
isters of currently valid International Standards.
ISO 3696:1987, Water for analytical laboratory use — Specification and test methods.
ISO 4287:1997, Geometrical Product Specifications (GPS) — Surface texture: Profile method — Terms, definitions
and surface texture parameters.
ISO 4288:1996, Geometrical Product Specifications (GPS) — Surface texture: Profile method — Rules and proce-
dures for the assessment of surface texture.
ISO 7539-1:1987, Corrosion of metals and alloys — Stress corrosion testing — Part 1: General guidance on testing
procedures.
3 Terms and definitions
For the purposes of this International Standard, the following terms and definitions apply.
3.1
threshold stress
stress below which no fracture in 500 h is observed (see also 8.8)
3.2
time-to-fracture
elapsed time from start of test until fracture of the specimen
4 Principle
4.1 A dilute salt solution is dripped on to a heated tensile specimen of the material under test which is held horizon-
tally and subjected to a uniaxial load.
4.2 Tests are carried out at different applied stresses and the time to specimen fracture is recorded. A threshold
stress is defined based on the principle of no observed fracture in 500 h.
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ISO 2000 – All rights reserved 1
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ISO 15324:2000(E)
4.3 The elevated temperatures, wetting and drying process and associated concentration of salt with the drop
evaporation process represent a potentially severe environmental condition which could induce stress corrosion
cracking in some alloys. As such, it represents a severe test for alloy performance.
4.4 Evaporation of salt solutions leading to salt concentration at elevated temperature is not uncommon in service
and can arise, e.g., in sea water spray situations or as a result of solution leaks dropping on to hot surfaces. However,
the variability of service conditions means that this method is suitable only as a method of ranking performance,
based on the magnitude of the threshold stress, and not as an acceptance test for service application.
5 Apparatus
5.1 System for applying a constant load to a specimen held in a horizontal configuration.
5.2 Equipment for applying an alternating or direct current of up to about thirty amperes current to the
specimen at a voltage of two volts or less.
NOTE The current required will depend on the dimensions of the specimen and the properties of the material.
5.3 A reservoir, (typically 20 l) for the sodium chloride solution connected to a vertical glass tube with internal and
external diameters approximately 0,4 mm and 4 mm respectively. The bottom of the glass tube is held at a distance
10 mm
of approximately above the centre of the specimen (see Figure 1).
Key
1 0,1 mol/l sodium chloride
2 Plastic shield to protect electrical connections
3 A.C. or D.C. electrical supply
4 Vessel to collect solution
a
Direction of applied load (force).
Figure 1 — Schematic arrangement for drop evaporation tests
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ISO 15324:2000(E)
The system shall be capable of delivering a controlled flow of solution of 10 drops/min (� 10 %) (see annex A). The
composition of the solution in the reservoir shall be maintained constant.
5.4 A suitable calibrated device for measuring the surface temperature of the specimen. Surface tempera-
ture measurement is important because of the need to ensure that the method of measurement itself does not affect
the temperature. Applicable methods are described in annex B.
5.5 A device for detecting specimen fracture and recording the time to fracture. A microswitch attached to the
specimen mounting and associated with an electric timer is suitable.
5.6 Some degree of containment of the test system, to lim
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