EN ISO 9225:2012

Corrosion of metals and alloys - Corrosivity of atmospheres - Measurement of environmental parameters affecting corrosivity of atmospheres (ISO 9225:2012)

ISO 9225:2012 specifies methods for measuring the parameters needed for corrosivity estimation used for classification of the corrosivity of atmospheres in ISO 9223.
ISO 9225:2012 specifies methods for the measurement of environmental parameters for normative corrosivity estimation based on calculated first-year corrosion rates of standard metals, and informative corrosivity estimation based on characterization of the exposure environment.
It does not describe the usual analytical techniques for the measured parameters since this depends on the available analytical techniques used in laboratories. Specific methods for deposition measurement of SO2 and Cl- deposition rates and conversional factors for comparison of different measuring methods are given.

Korrosion von Metallen und Legierungen - Korrosivität von Atmosphären - Messung der die Korrosivität von Atmosphären beeinflussenden Umweltparameter (ISO 9225:2012)

Diese Internationale Norm legt Verfahren zur Messung der Parameter fest, die zur Abschätzung der
Korrosivität benötigt werden, die für die Klassifizierung der Korrosivität von Atmosphären nach ISO 9223
verwendet wird.
Diese Internationale Norm legt Verfahren fest zur Messung von Umweltparametern für
 die normative Abschätzung der Korrosivität auf der Grundlage der Korrosionsgeschwindigkeiten
berechnet nach einem Jahr der Auslagerung von metallischen Standardproben, und
 die informative Abschätzung der Korrosivität auf der Grundlage der Charakterisierung der
Auslagerungsumgebung.
In der vorliegenden Internationalen Norm sind die Analysenverfahren für die gemessenen Parameter nicht
beschrieben, weil das von den in den Laboratorien verfügbaren Analysenverfahren abhängt. Spezielle Verfahren
zur Messung der Ablagerungsgeschwindigkeiten von SO2 und von Cl− sowie die Umrechnungsfaktoren zum
Vergleich verschiedener Messverfahren sind in den Anhängen A, B, C, D, E und F angeführt.
Für Verfahren, welche die Charakterisierung der Auslagerungsorte in der Atmosphäre im Allgemeinen
betreffen, siehe ISO 8565.

Corrosion des métaux et alliages - Corrosivité des atmosphères - Mesurage des paramètres environnementaux affectant la corrosivité des atmosphères (ISO 9225:2012)

L'ISO 9225:2012 spécifie des méthodes pour le mesurage des paramètres nécessaires pour l'estimation de la corrosivité utilisée pour la classification de la corrosivité des atmosphères dans l'ISO 9223.
L'ISO 9225:2012 spécifie des méthodes de mesurage des paramètres environnementaux pour l'estimation normative de la corrosivité basée sur les vitesses de corrosion des métaux de référence, calculées sur la première année, et pour l'estimation informative de la corrosivité basée sur la caractérisation de l'environnement d'exposition.
Elle ne décrit pas les méthodes habituelles d'analyse des paramètres mesurés vu qu'elles dépendent des techniques analytiques disponibles dans les laboratoires. Des méthodes spécifiques pour le mesurage des vitesses de dépôt du dioxyde de soufre et des chlorures ainsi que des facteurs de conversion permettant de comparer différentes méthodes de mesurage sont fournis.

Korozija kovin in zlitin - Korozivnost v atmosferskem okolju - Merjenje okoljskih parametrov, ki vplivajo na korozivnost atmosfer (ISO 9225:2012)

Ta mednarodni standard določa metode za merjenje parametrov, potrebnih za oceno korozivnosti za razvrščanje korozivnosti v atmosferskem okolju v standardu ISO 9223. Ta mednarodni standard določa metode za merjenje okoljskih parametrov za: – normativno oceno korozivnosti na podlagi izračunanih hitrosti korozije standardnih kovin v prvem letu in – informativno oceno korozivnosti na podlagi značilnosti okolja izpostavljenosti. Ta mednarodni standard ne opisuje običajnih analitskih tehnik za izmerjene parametre, ker je to odvisno od razpoložljivih analitskih tehnik, ki se uporabljajo v laboratorijih. Posebne metode za merjenje nalaganja SO2 in Cl – hitrosti nalaganja in pretvorbeni faktorji za primerjavo različnih merilnih metod so predstavljeni v dodatkih A, B, C, D, E in F. Za metode, ki se nanašajo na označevanje območij izpostavljenosti atmosferskemu okolju na splošno, glejte standard ISO 8565.

General Information

• Status: Published
• Publication Date: 31-Jan-2012
• Withdrawal Date: 30-Aug-2012
• ICS: 77.060 - Corrosion of metals
• Technical Committee: CEN/TC 262 - Metallic and other inorganic coatings
• Drafting Committee: CEN/TC 262 - Metallic and other inorganic coatings
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 01-Feb-2012
• Completion Date: 01-Feb-2012
• Ref Project: SIST EN ISO 9225:2012 - Corrosion of metals and alloys - Corrosivity of atmospheres - Measurement of environmental parameters affecting corrosivity of atmospheres (ISO 9225:2012) measurement of environmental parameters affecting indoor corrosivity

Relations

• Replaces: EN 12500:2000 - Protection of metallic materials against corrosion - Corrosion likelihood in atmospheric environment - Classification, determination and estimation of corrosivity of atmospheric environments
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2012
1DGRPHãþD
SIST EN 12500:2000
Korozija kovin in zlitin - Korozivnost v atmosferskem okolju - Merjenje okoljskih
parametrov, ki vplivajo na korozivnost atmosfer (ISO 9225:2012)
&RUURVLRQRIPHWDOVDQGDOOR\V&RUURVLYLW\RIDWPRVSKHUHV0HDVXUHPHQWRI
HQYLURQPHQWDOSDUDPHWHUVDIIHFWLQJFRUURVLYLW\RIDWPRVSKHUHV,62
PHDVXUHPHQWRIHQYLURQPHQWDOSDUDPHWHUVDIIHFWLQJLQGRRUFRUURVLYLW\
Korrosion von Metallen und Legierungen - Korrosivität von Atmosphären - Messung der
die Korrosivität von Atmosphären beeinflussenden Umweltparameter (ISO 9225:2012)
Corrosion des métaux et alliages - Corrosivité des atmosphères - Mesurage des
paramètres environnementaux affectant la corrosivité des atmosphères (ISO 9225:2012)
Ta slovenski standard je istoveten z: EN ISO 9225:2012
ICS:
77.060 Korozija kovin Corrosion of metals
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 9225
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2012
ICS 77.060 Supersedes EN 12500:2000
English Version
Corrosion of metals and alloys - Corrosivity of atmospheres -
Measurement of environmental parameters affecting corrosivity
of atmospheres (ISO 9225:2012)
Corrosion des métaux et alliages - Corrosivité des Korrosion von Metallen und Legierungen - Korrosivität von
atmosphères - Mesurage des paramètres Atmosphären - Messung der die Korrosivität von
environnementaux affectant la corrosivité des atmosphères Atmosphären beeinflussenden Umweltparameter (ISO
(ISO 9225:2012) 9225:2012)
This European Standard was approved by CEN on 22 January 2012.

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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

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 9225:2012: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 9225:2012) 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 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 2012, and conflicting national standards shall be withdrawn at
the latest by August 2012.
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 12500:2000.
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, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 9225:2012 has been approved by CEN as a EN ISO 9225:2012 without any modification.

INTERNATIONAL ISO
STANDARD 9225
Second edition
2012-02-01
Corrosion of metals and alloys —
Corrosivity of atmospheres —
Measurement of environmental
parameters affecting corrosivity of
atmospheres
Corrosion des métaux et alliages — Corrosivité des atmosphères —
Mesurage des paramètres environnementaux affectant la corrosivité
des atmosphères
Reference number
ISO 9225:2012(E)
©
ISO 2012
ISO 9225:2012(E)
©  ISO 2012
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56  CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Published in Switzerland
ii © ISO 2012 – All rights reserved

ISO 9225:2012(E)
Contents Page
Foreword . iv
Introduction . v
1  Scope . 1
2  Normative references . 1
3  Principle . 1
4  Humidity and temperature parameters . 2
4.1  Relative humidity . 2
4.2  Temperature . 2
5  Airborne contaminants . 2
5.1  Principle . 2
5.2  Placement of measurement equipment . 3
5.3  Measurement methods and duration . 3
Annex A (normative) Determination of sulfur dioxide deposition rate on lead dioxide sulfation
plates . 6
Annex B (normative) Determination of sulfur dioxide deposition rate on lead dioxide sulfation
cylinder . 9
Annex C (normative) Determination of sulfur dioxide deposition rate on alkaline surfaces . 12
Annex D (normative) Determination of chloride deposition rate by the wet candle method . 14
Annex E (normative) Determination of chloride deposition rate by dry plate method . 18
Annex F (normative) Comparison of chlorides and sulfur dioxide deposition rates determined by
different methods . 21
Bibliography . 22

ISO 9225:2012(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 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.
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.
ISO 9225 was prepared by Technical Committee ISO/TC 156, Corrosion of metals and alloys.
This second edition cancels and replaces the first edition (ISO 9225:1992), which has been technically revised.
iv © ISO 2012 – All rights reserved

ISO 9225:2012(E)
Introduction
The ability of an atmosphere to cause corrosion of metals and alloys is controlled by the following factors: the
temperature-humidity complex and pollution. A basic requirement for the estimation of the corrosivity of
atmospheres is standardized measurement of the important parameters describing the correlation between
the corrosion and the environmental characteristics.
The methods included in this International Standard have been chosen for their easy applicability and good
comparability of results. It is important to stress that the methods for estimation of the atmospheric corrosivity
given in ISO 9223 are based on the measurement methods described in this International Standard.

INTERNATIONAL STANDARD ISO 9225:2012(E)

Corrosion of metals and alloys — Corrosivity of atmospheres —
Measurement of environmental parameters affecting corrosivity
of atmospheres
WARNING — Some of the procedures included in this International Standard entail the use of
potentially hazardous chemicals. lt is emphasized that all appropriate safety precautions should be
taken.
1 Scope
This International Standard specifies methods for measuring the parameters needed for corrosivity estimation
used for classification of the corrosivity of atmospheres in ISO 9223.
This International Standard specifies methods for the measurement of environmental parameters for
 normative corrosivity estimation based on calculated first-year corrosion rates of standard metals, and
 informative corrosivity estimation based on characterization of the exposure environment.
This International Standard does not describe the usual analytical techniques for the measured parameters
since this depends on the available analytical techniques used in laboratories. Specific methods for deposition

measurement of SO and Cl deposition rates and conversional factors for comparison of different measuring
methods are presented in Annexes A, B, C, D, E and F.
For methods pertaining to the characterization of the atmospheric exposure site in general, see ISO 8565.
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 9223, Corrosion of metals and alloys — Corrosivity of atmospheres — Classification, determination and
estimation
ISO 11844-3, Corrosion of metals and alloys — Classification of low corrosivity of indoor atmospheres —
Part 3: Measurement of environmental parameters affecting indoor corrosivity
3 Principle
Different environmental parameters and their combinations affect the corrosivity of the atmosphere. Two
methods for corrosivity estimation (normative and informative) are specified in ISO 9223.
In general, two groups of parameters are obtained or measured for standardized procedures of corrosivity
estimation:
 humidity and temperature;
 airborne contaminants.
ISO 9225:2012(E)
Standardized corrosivity estimation is based on information on levels of the dominating environmental
parameters: the temperature-humidity complex, and pollution with SO and airborne chlorides. Measurements
of these parameters are mandatory for the purpose of corrosivity estimation.

Contaminants other than SO and Cl , s
...