EN ISO 8044:2015

SLOVENSKI STANDARD
01-december-2015
1DGRPHãþD
SIST EN ISO 8044:2000
Korozija kovin in zlitin - Osnovni pojmi in definicije (ISO 8044:2015)
Corrosion of metals and alloys - Basic terms and definitions (ISO 8044:2015)
Korrosion von Metallen und Legierungen - Grundbegriffe (ISO 8044:2015)
Corrosion des métaux et alliages - Termes principaux et définitions (ISO 8044:2015)
Ta slovenski standard je istoveten z: EN ISO 8044:2015
ICS:
01.040.77 Metalurgija (Slovarji) Metallurgy (Vocabularies)
77.060 Korozija kovin Corrosion of metals
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 8044
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2015
EUROPÄISCHE NORM
ICS 77.060; 01.040.77 Supersedes EN ISO 8044:1999
English Version
Corrosion of metals and alloys - Basic terms and
definitions (ISO 8044:2015)
Corrosion des métaux et alliages - Termes principaux Korrosion von Metallen und Legierungen -
et définitions (ISO 8044:2015) Grundbegriffe (ISO 8044:2015)
This European Standard was approved by CEN on 13 May 2015.

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-CENELEC 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-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 8044:2015 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
European foreword
This document (EN ISO 8044:2015) has been prepared by Technical Committee ISO/TC 156 “Corrosion
of metals and alloys” in collaboration with 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 March 2016, and conflicting national standards shall
be withdrawn at the latest by March 2016.
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.
This document supersedes EN ISO 8044:1999.
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,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 8044:2015 has been approved by CEN as EN ISO 8044:2015 without any modification.

INTERNATIONAL ISO
STANDARD 8044
NORME
Fourth edition
Quatrième édition
INTERNATIONALE 2015-09-01
Corrosion of metals and alloys — Basic
terms and definitions
Corrosion des métaux et alliages —
Termes principaux et définitions
Korrosion von Metallen und
Legierungen — Grundbegriffe
Reference number
Numéro de référence
ISO 8044:2015(E/F)
©
ISO 2015
ISO 8044:2015(E/F)
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2015
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ISO 8044:2015(E/F)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 General terms . 1
3 Types of corrosion . 3
4 Corrosion protection . 9
5 Corrosion testing .11
6 Electrochemical terms .12
6.1 The electrochemical cell .12
6.2 Reaction rates .16
6.3 Passivation .18
6.4 Electrochemical protection .19
6.5 Electrochemical corrosion tests .20
Bibliography .23
ISO 8044:2015(E/F)
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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any
patent rights identified during the development of the document will be in the Introduction and/or on
the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 156, Corrosion of metals and alloys.
This fourth edition cancels and replaces the third edition (ISO 8044:1999), which has been revised to
include additional terms and definitions.
iv © ISO 2015 – All rights reserved/Tous droits réservés

ISO 8044:2015(E/F)
Introduction
The definitions in this International Standard have been drawn up with the objective of achieving a
proper balance between precision and simplicity. The main objective of this International Standard is to
provide definitions that can be understood to have the same meaning by all concerned. Some corrosion
terms in present use have developed through common usage and are not always logical. It has not,
therefore, been possible to define certain terms in the form they are used in some countries. Because of
the occasional conflicts between tradition and logic some definitions inevitably represent a compromise.
An example of this kind of conflict is the term “corrosion”. This has been used to mean the process,
results of the process and damage caused by the process. In this International Standard corrosion is
understood to mean the process. Any detectable result of corrosion in any part of a corrosion system is
termed “corrosion effect”. The term “corrosion damage” covers any impairment of the function of the
technical system of which the metal and the environment form a part. Consequently the term “corrosion
protection” implies that the important thing is to avoid corrosion damage rather than to prevent
corrosion, which in many cases is impossible and sometimes not necessary.
INTERNATIONAL STANDARD ISO 8044:2015(E/F)
Corrosion of metals and alloys — Basic terms and
definitions
1 Scope
This International Standard defines terms relating to corrosion that are widely used in modern science
and technology. In addition, some definitions are supplemented with short explanations.
NOTE 1 Throughout the document IUPAC rules for electrode potential signs are applied. The term “metal” is
also used to include alloys and other metallic materials.
NOTE 2 Terms and definitions related to inorganic surface treatment of metals are given in ISO 2080.
NOTE 3 See also the ISO online browsing platform (OBP): www.iso.org/obp/ui/
2 General terms
2.1
corrosion
physicochemical interaction between a metal and its environment that results in changes in the
properties of the metal, and which may lead to significant impairment of the function of the metal, the
environment, or the technical system, of which these form a part
Note 1 to entry: This interaction is often of an electrochemical nature.
2.2
corrosive agent
corrodent
substance which when in contact with a given metal will cause corrosion (2.1)
2.3
corrosive environment
environment that contains one or more corrosive agents (2.2)
2.4
corrosion system
system consisting of one or more metals and those parts of the environment that influence corrosion
(2.1)
Note 1 to entry: Parts of the environment may be, for example, coatings, surface layers or additional electrodes
(6.1.2).
2.5
corrosion effect
change in any part of the corrosion system (2.4) caused by corrosion (2.1)
2.6
corrosio
...