EN ISO 8044:1999/prA1

SLOVENSKI STANDARD
01-januar-2013
Korozija kovin in zlitin - Osnovni pojmi in definicije - Dopolnilo 1 (ISO
8044:1999/DAM 1:2012)
Corrosion of metals and alloys - Basic terms and definitions - Amendment 1 (ISO
8044:1999/DAM 1:2012)
Korrosion von Metallen und Legierungen - Grundbegriffe und Definitionen - Änderung 1
(ISO 8044:1999/DAM 1:2012)
Corrosion des métaux et alliages - Termes principaux et définitions - Amendement 1
(ISO 8044:1999/DAM 1:2012)
Ta slovenski standard je istoveten z: EN ISO 8044:1999/prA1
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.

EUROPEAN STANDARD
DRAFT
EN ISO 8044:1999
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
October 2012
ICS 01.040.77; 77.060
English Version
Corrosion of metals and alloys - Basic terms and definitions -
Amendment 1 (ISO 8044:1999/DAM 1:2012)
Corrosion des métaux et alliages - Termes principaux et Korrosion von Metallen und Legierungen - Grundbegriffe
définitions - Amendement 1 (ISO 8044:1999/DAM 1:2012) und Definitionen - Änderung 1 (ISO 8044:1999/DAM
1:2012)
This draft amendment is submitted to CEN members for parallel enquiry. It has been drawn up by the Technical Committee CEN/TC 262.

This draft amendment A1, if approved, will modify the European Standard EN ISO 8044:1999. If this draft becomes an amendment, CEN
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this amendment
into the relevant national standard without any alteration.

This draft amendment was established by CEN 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 8044:1999/prA1:2012: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 8044:1999/prA1:2012) 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 document is currently submitted to the parallel Enquiry.
Endorsement notice
The text of ISO 8044:1999/DAM 1:2012 has been approved by CEN as a EN ISO 8044:1999/prA1:2012
without any modification.
DRAFT AMENDMENT ISO 8044:1999/DAM 1
ISO/TC 156 Secretariat: SAC
Voting begins on Voting terminates on

2012-10-25 2013-03-25
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION    МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ    ORGANISATION INTERNATIONALE DE NORMALISATION

Corrosion of metals and alloys — Basic terms and definitions
AMENDMENT 1
Corrosion des métaux et alliages — Termes principaux et définitions
AMENDEMENT 1
ICS 01.040.77; 77.060
ISO/CEN PARALLEL PROCESSING
This draft has been developed within the International Organization for Standardization (ISO), and
processed under the ISO-lead mode of collaboration as defined in the Vienna Agreement.
This draft is hereby submitted to the ISO member bodies and to the CEN member bodies for a parallel
five-month enquiry.
Should this draft be accepted, a final draft, established on the basis of comments received, will be
submitted to a parallel two-month approval vote in ISO and formal vote in CEN.

To expedite distribution, this document is circulated as received from the committee
secretariat. ISO Central Secretariat work of editing and text composition will be undertaken at
publication stage.
Pour accélérer la distribution, le présent document est distribué tel qu'il est parvenu du
secrétariat du comité. Le travail de rédaction et de composition de texte sera effectué au
Secrétariat central de l'ISO au stade de publication.

THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL. IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE
REFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL, TECHNOLOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME
STANDARDS TO WHICH REFERENCE MAY BE MADE IN NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION.
©  International Organization for Standardization, 2012

ISO 8044:1999/DAM 1
Copyright notice
This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as permitted
under the applicable laws of the user’s country, neither this ISO draft nor any extract from it may be
reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic,
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ii © ISO 2012 – All rights reserved

ISO/DIS 8044/Amendment
Contents Page
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1

ISO/DIS 8044/Amendment
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 2.
The main task of technical committees is to prepare International Standards. 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.
ISO 8044/Amendment was prepared by Technical Committee ISO/TC 156, Corrosion of metals and alloys.
iv © ISO 202 – All rights reserved

ISO/DIS 8044/Amendment
Introduction
The definitions in ISO 8044 have been drawn up with the objective of achieving a proper balance between
precision and simplicity. The main objective of this 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.
This amendment has been drawn up to complete ISO 8044 with new or old terms which has been found
imported to also have international standardized.

DRAFT INTERNATIONAL STANDARD ISO/DIS 8044/Amendment

Corrosion of metals and alloys — Basic terms and
definitions — Amendment 1
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.
The terms in this amendment is presented in alphabetic order.
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 EN ISO 2080, Metallic and
other inorganic coatings – Surface treatment, metallic and other inorganic coatings – Vocabulary.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 8044:1999, Corrosion of metals and alloys — Basic terms and definitions
3 Terms and definitions
3.1
activation polarization
polarization due to charge transfer
3.2
anodic polarization
the change of the electrode potential in the positive direction caused by current flow
Note 1 to entry: cf. electrode polarization (in 6.2.09) ISO 8044.
3.3
anode potential
electrode potential of the anode of a corrosion or electrochemical cell
3.4
aqueous corrosion
corrosion with water or a water-based solution as the corrosive environment

3.5
auxiliary electrode/counter electrode
electrode commonly used in applied polarization to balance the current passing to the working electrode
ISO/DIS 8044/Amendment
Note 1 to entry: It is usually made from a non-corroding material.
3.6
cathodic polarization
the change of the electrode potential in the negative direction caused by current flow
Note 1 to entry: cf. electrode polarization (6.2.09) in ISO 8044.
3.7
cathode potential
electrode potential of the cathode of a corrosion or electrochemical cell
3.8
cell current
current which flows between the anode and the cathode
3.9
concentration polarization
that portion of the electrode polarization of a cell produced by concentration changes resulting from passage
of current through the electrolyte
Note 1 to entry: cf. concentration cell (6.1.14) in ISO 8044.
3.10
corrosion attack
damage caused by corrosion
Note 1 to entry: Commonly used term.
3.11
critical potential (threshold potential)
electrode potential above or below which the corrosion varies markedly
Note 1 to entry: A critical potential is not an accurate value, may represent a small potential range of about 0,1 V width
3.12
cyclic atmospheric corrosion test
accelerated corrosion test by exposure of coated and uncoated samples to alternating environmental
conditions designed to reflect atmospheric exposure
3.13
dealloying
see selective corrosion (in 3.20) ISO 8044
3.14
earth resistance, ground bed resistance
ohmic resistance between an anode (ground bed) in infinite space and a remote cathode with infinite surface
area, without consideration of polarisation resistance
Note 1 to entry: The earth resistance depends on geometrical data of the electrode and the resistivity of the medium
within the space.
3.15
electrochemical cell
a system composed of an anode, a cathode and an electrolyte
3.16
environmentally assisted cracking
cracking of a susceptible metal or alloy due to the conjoint action of an environment and stress
2 © ISO 202 – All rights reserved

ISO/DIS 8044/Amendment
3.17
equilibrium potential
electrode potential of an electrode reaction which is in thermodynamic equilibrium with its environment
3.1
...