EN ISO 10271:2001

SLOVENSKI STANDARD
01-maj-2002
Dental metallic materials - Corrosion test methods (ISO 10271:2001)
Dental metallic materials - Corrosion test methods (ISO 10271:2001)
Dentale metallische Werkstoffe - Korrosionsprüfverfahren (ISO 10271:2001)
Produits dentaires métalliques - Méthodes pour les essais de corrosion (ISO
10271:2001)
Ta slovenski standard je istoveten z: EN ISO 10271:2001
ICS:
11.060.10 =RERWHKQLþQLPDWHULDOL Dental materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 10271
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2001
ICS 01.006.10
English version
Dental metallic materials - Corrosion test methods (ISO
10271:2001)
Produits dentaires métalliques - Méthodes pour les essais Dentale metallische Werkstoffe - Korrosionsprüfverfahren
de corrosion (ISO 10271:2001) (ISO 10271:2001)
This European Standard was approved by CEN on 1 June 2001.
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 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
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versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
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© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10271:2001 E
worldwide for CEN national Members.

CORRECTED 2001-10-31
Foreword
The text of the International Standard ISO 10271:2001 has been prepared by Technical Committee ISO/TC 106
"Dentistry" in collaboration with Technical Committee CEN/TC 55 "Dentistry", the secretariat of which is held by DIN.
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endorsement, at the latest by December 2001, and conflicting national standards shall be withdrawn at the latest by
December 2001.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries
are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France,
Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland
and the United Kingdom.
Endorsement notice
The text of the International Standard ISO 10271:2001 was approved by CEN as a European Standard without any
modification.
NOTE: Normative references to International Standards are listed in annex ZA (normative).
Annex ZA (normative)
Normative references to international publications
with their relevant European publications
This European Standard incorporates by dated or undated reference, provisions from other publications.
These normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply
to this European Standard only when incorporated in it by amendment or revision. For undated references
the latest edition of the publication referred to applies (including amendments).
NOTE Where an International Publication has been modified by common modifications, indicated by (mod.),
the relevant EN/HD applies.
Publication Year Title EN Year
ISO 1562 1993 Dental casting gold alloys EN ISO 1562 1995
ISO 3696 1987 Water for analytical laboratory use – EN ISO 3639 1995
Specification and test methods
ISO 8891 1998 Dental casting alloys with noble metal EN ISO 8891 1998
content of at least 25 % but less than
75 %
ISO 9333 1990 Dental brazing alloys EN 29333 1991
ISO 9693 2000 Metal-ceramic dental restorative sytems EN ISO 9693 2000
INTERNATIONAL ISO
STANDARD 10271
First edition
2001-06-01
Dental metallic materials — Corrosion test
methods
Produits dentaires métalliques — Méthodes pour les essais de corrosion
Reference number
ISO 10271:2001(E)
©
ISO 2001
ISO 10271:2001(E)
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ii © ISO 2001 – All rights reserved

ISO 10271:2001(E)
Contents Page
Foreword.iv
Introduction.v
1 Scope .1
2 Normative references .1
3 Terms and definitions .1
4 Test methods.3
Annex A (informative) Corrosion test method development .12
Bibliography.18
ISO 10271:2001(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
committees. 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
liaison 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 10271 was prepared by Technical Committee ISO/TC 106, Dentistry, Subcommittee
SC 2, Prosthodontic materials.
This first edition cancels and replaces ISO/TR 10271:1993 which has been technically revised, in particular by the
inclusion of a wider range of test methods.
Annex A of this International Standard is for information only.
iv © ISO 2001 – All rights reserved

ISO 10271:2001(E)
Introduction
ISO 10271 was developed from the original Technical Report (ISO/TR 10271) as a result of worldwide demand for
standard test methods to determine acceptability of metallic materials for oral restorations in relation to corrosion.
The testing of the corrosion behaviour of metallic materials in dentistry is complicated by the diversity of the
materials themselves, their applications and the environment to which they are exposed. Variation occurs between
devices and within the same device during the exposure time. The type of corrosion behaviour or effect may also
vary with exposure time. Accordingly, it is not possible to specify a single test capable of covering all situations, nor
is it a practical proposition to define a test for each situation. This International Standard therefore gives detailed
protocols for test methods which have been found to be of merit as evidenced by considerable use.
In addition, an informative annex (annex A) is provided that sets out a protocol for each element of the test system
such that a consistent approach may be taken for the development of further test methods. Equally, it is recognized
that any element can only represent the current recommendation, but changes in the future are unlikely to change
the framework
It is not the purpose of this International Standard to propose corrosion test methods for specific applications or to
set limits as precise as those in the standard relating to the type of product and its application.
INTERNATIONAL STANDARD ISO 10271:2001(E)
Dental metallic materials — Corrosion test methods
1 Scope
This International Standard provides test methods and protocols to determine the corrosion behaviour of all metallic
materials used in restorative, prosthetic and orthodontic dentistry in the oral cavity, including cast, machined and
prefabricated devices.
This International Standard is not applicable to instruments and appliances.
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
publications do not apply. However, parties to agreements based on this International Standard are encouraged to
investigate the possibility of applying the most recent editions of the normative documents indicated below. For
undated references, the latest editions of the normative documents referred to applies. Members of ISO and IEC
maintain registers of currently valid International Standards.
ISO 1562, Dental casting gold alloys.
ISO 3585, Borosilicate glass 3.3 — Properties.
ISO 3696:1987, Water for analytical laboratory use — Specification and test methods.
ISO 7183-2:1996, Compressed air dryers — Part 2: Performance ratings.
ISO 8891, Dental casting alloys with noble metal content of at least 25 % but less than 75 %.
ISO 9333, Dental brazing materials.
ISO 9693, Metal-ceramic dental restorative systems.
3 Terms and definitions
For the purposes of this International Standard, the following terms and definitions apply.
3.1
breakdown potential
E
p
least noble potential at which pitting or crevice corrosion, or both, will initiate and propagate
3.2
corrosion
physicochemical interaction between a metal or an alloy and its environment that results in a partial or total
destruction of the material or in a change of its properties
ISO 10271:2001(E)
3.3
corrosion potential
E
corr
open-circuit potential measured under either service conditions or laboratory conditions that closely approximate to
service conditions
3.4
corrosion product
substance formed as a result of corrosion
3.5
crevice corrosion
corrosion associated with and taking place in or near a narrow aperture or crevice
3.6
current density
value of electric current per unit surface area flowing through a conductor
3.7
electrochemical corrosion
degradation occurring in an electrolyte as a result of electrochemical reactions
3.8
electrolyte
solution or liquid which will conduct an electrical current by means of ions
3.9
electrode potential
potential difference between the sample and a reference electrode
3.10
dynamic immersion test
test in which the sample is exposed to a corrosive solution under conditions of relative motion between sample and
solution
3.11
static immersion test
test in which the sample is exposed to a corrosive solution under conditions of minimum relative motion between
sample and solution
3.12
open-circuit potential
E
ocp
potential of an electrode measured with respect to a reference electrode or another electrode when no current
flows
3.13
pitting corrosion
localized corrosion whi
...