EN ISO 8044:2020

SLOVENSKI STANDARD
01-maj-2020
Nadomešča:
SIST EN ISO 8044:2015
Korozija kovin in zlitin - Slovar (ISO 8044:2020)
Corrosion of metals and alloys - Vocabulary (ISO 8044:2020)
Korrosion von Metallen und Legierungen - Grundbegriffe (ISO 8044:2020)
Corrosion des métaux et alliages - Vocabulaire (ISO 8044:2020)
Ta slovenski standard je istoveten z: EN ISO 8044:2020
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
February 2020
EUROPÄISCHE NORM
ICS 01.040.77; 77.060 Supersedes EN ISO 8044:2015
English Version
Corrosion of metals and alloys - Vocabulary (ISO
8044:2020)
Corrosion des métaux et alliages - Vocabulaire (ISO Korrosion von Metallen und Legierungen -
8044:2020) Grundbegriffe (ISO 8044:2020)
This European Standard was approved by CEN on 27 January 2020.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, 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: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 8044:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 8044:2020) 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, including for corrosion protection and corrosion testing of metals and alloys” 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 August 2020, and conflicting national standards shall
be withdrawn at the latest by August 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 8044:2015.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 8044:2020 has been approved by CEN as EN ISO 8044:2020 without any modification.

INTERNATIONAL ISO
STANDARD 8044
Fifth edition
2020-02
Corrosion of metals and alloys —
Vocabulary
Corrosion des métaux et alliages — Vocabulaire
Reference number
ISO 8044:2020(E)
©
ISO 2020
ISO 8044:2020(E)
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
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below or ISO’s member body in the country of the requester.
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Phone: +41 22 749 01 11
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Email: copyright@iso.org
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Published in Switzerland
ii © ISO 2020 – All rights reserved

ISO 8044:2020(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms related to corrosion in general . 1
4 Terms related to types of corrosion . 4
5 Terms related to corrosion protection . 9
6 Terms related to corrosion testing .11
7 Terms related to electrochemical matters .12
7.1 The electrochemical cell .12
7.2 Reaction rates .16
7.3 Passivation .17
7.4 Electrochemical protection .19
7.5 Electrochemical corrosion tests .20
Annex A (informative) Graphical representations of certain terms .22
Bibliography .24
Index .25
ISO 8044:2020(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.
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 of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO’s adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 156, Corrosion of metals and alloys, in
collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/
TC 262, Metallic and other inorganic coatings, including for corrosion protection and corrosion testing of
metals and alloys, in accordance with the Agreement on technical cooperation between ISO and CEN
(Vienna Agreement).
This fifth edition cancels and replaces the fourth edition (ISO 8044:2015), which has been technically
revised to include additional terms and definitions.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved

ISO 8044:2020(E)
Introduction
The definitions in this document have been drawn up with the objective of achieving a proper balance
between precision and simplicity. The main objective of this document 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 document, 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 8044:2020(E)
Corrosion of metals and alloys — Vocabulary
1 Scope
This document 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 the inorganic surface treatment of metals are given in ISO 2080.
2 Normative references
There are no normative references in this document.
3 Terms related to corrosion in general
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
corrosion
physicochemical interaction between a metallic material and its environment that results in changes in
the properties of the metal, and that 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.
3.2
corrosive agent
substance that will initiate or promote corrosion (3.1) when in contact with a given metal
3.3
corrosive environ
...