EN ISO 8407:2021

SLOVENSKI STANDARD
01-marec-2021
Nadomešča:
SIST EN ISO 8407:2014
Korozija kovin in zlitin - Odstranjevanje produktov korozije s preskusnih vzorcev
(ISO 8407:2021)
Corrosion of metals and alloys - Removal of corrosion products from corrosion test
specimens (ISO 8407:2021)
Korrosion von Metallen und Legierungen - Entfernen von Korrosionsprodukten von
Korrosionsprobekörpern (ISO 8407:2021)
Corrosion des métaux et alliages - Élimination des produits de corrosion sur les
éprouvettes d'essai de corrosion (ISO 8407:2021)
Ta slovenski standard je istoveten z: EN ISO 8407:2021
ICS:
77.060 Korozija kovin Corrosion of metals
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 8407
EUROPEAN STANDARD
NORME EUROPÉENNE
January 2021
EUROPÄISCHE NORM
ICS 77.060 Supersedes EN ISO 8407:2014
English Version
Corrosion of metals and alloys - Removal of corrosion
products from corrosion test specimens (ISO 8407:2021)
Corrosion des métaux et alliages - Élimination des Korrosion von Metallen und Legierungen - Entfernen
produits de corrosion sur les éprouvettes d'essai de von Korrosionsprodukten von
corrosion (ISO 8407:2021) Korrosionsprobekörpern (ISO 8407:2021)
This European Standard was approved by CEN on 19 December 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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 8407:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 8407:2021) 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 July 2021, and conflicting national standards shall be
withdrawn at the latest by July 2021.
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 8407:2014.
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 8407:2021 has been approved by CEN as EN ISO 8407:2021 without any modification.

INTERNATIONAL ISO
STANDARD 8407
Third edition
2021-01
Corrosion of metals and alloys —
Removal of corrosion products from
corrosion test specimens
Corrosion des métaux et alliages — Élimination des produits de
corrosion sur les éprouvettes d'essai de corrosion
Reference number
ISO 8407:2021(E)
©
ISO 2021
ISO 8407:2021(E)
© ISO 2021
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
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
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CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved

ISO 8407:2021(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Procedures . 1
4.1 General . 1
4.2 Chemical procedures . 3
4.3 Electrolytic procedures . 3
4.4 Mechanical procedures . 3
5 Test report . 4
Annex A (informative) Chemical and electrolytic cleaning procedures for removal of
corrosion products . 5
Bibliography .11
ISO 8407:2021(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 third edition cancels and replaces the second edition (ISO 8407:2009), which has been technically
revised. The main changes compared with the previous edition are as follows:
— Table A.1 has been revised to include current chemical cleaning procedures for the removal of
corrosion products.
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 2021 – All rights reserved

INTERNATIONAL STANDARD ISO 8407:2021(E)
Corrosion of metals and alloys — Removal of corrosion
products from corrosion test specimens
WARNING — Safety rules for personnel: handling of the solutions used for the removal of
corrosion products shall be left to skilled personnel or conducted under their control. The
equipment shall be used and maintained by skilled personnel, not only so that the procedures
can be performed correctly, but also because of the hazards to health and safety that are
involved.
1 Scope
This document specifies procedures for the removal of corrosion products formed on metal and alloy
corrosion test specimens during their exposure in corrosive environments. For the purpose of this
document, the term “metals” refers to pure metals and alloys.
The specified procedures are designed to remove all corrosion products without significant removal of
base metal. This allows an accurate determination of the mass loss of the metal, which occurred during
exposure to the corrosive environment.
In some cases, these procedures are also applicable to metal coatings, providing the possible effects
from the substrate are considered.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
No terms and definitions are listed in this document.
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/
4 Procedures
4.1 General
4.1.1 A light mechanical cleaning treatment by brushing, e.g. a soft bristle brush under running water,
should first be applied to remove lightly adherent or bulky corrosion products.
4.1.2 If the treatment described in 4.1.1 does not remove all corrosion products, it will be necessary to
use other procedures. These are of three types:
a) chemical;
b) electrolytic;
c) more vigorous mechanical treatments.
NOTE These treatments will also remove some base metal.
ISO 8407:2021(E)
Whichever method is used, it might be necessary to repeat the cleaning treatment to ensure complete
removal of the corrosion products. Removal shall be confirmed by visual examination. The use of a low-
power microscope (i.e. × 7 to × 30) is particularly helpful with a pitted surface since corrosion products
can accumulate in pits.
4.1.3 An ideal procedure should remove corrosion products and not result in the removal of any
base metal. Two procedures can be used to confirm this point. One procedure uses a control specimen
(see 4.1.4) and the other requires a certain number of cleaning cycles on the corroded specimen (see
4.1.5). The procedures shall be maintained while the rust removal performance of the solutions listed in
Tables A.1 and A.2 is not impaired.
NOTE 1 Indications that the solution needs to be discarded can be discoloration or the presence of a significant
amount of corrosion
...