SIST EN ISO 11844-1:2008
(Main)Corrosion of metals and alloys - Classification of low corrosivity of indoor atmospheres - Part 1: Determination and estimation of indoor corrosivity (ISO 11844-1:2006)
Corrosion of metals and alloys - Classification of low corrosivity of indoor atmospheres - Part 1: Determination and estimation of indoor corrosivity (ISO 11844-1:2006)
This part of ISO 11844 deals with the classification of low corrosivity of indoor atmospheres. The aim of this part of ISO 11844 is to characterise indoor atmospheric environments of low corrosivity that can affect metals and metallic coatings during storage, transport, installation or operational use, to set a consistent way of indoor corrosivity classification, and to prescribe procedures for derivation and estimation of indoor corrosivity categories. This part of ISO 11844 specifies technical metals, whose corrosion attack after a defined exposure period is used for determination of corrosivity categories of indoor atmospheres of low corrosivity. This part of ISO 11844 defines corrosivity categories of indoor atmospheres according to corrosion attack on standard specimens. This part of ISO 11844 indicates important parameters of indoor atmospheres that can serve as a basis for an estimation of indoor corrosivity. Selection of a method for determination of corrosion attack, description of standard specimens, its exposure conditions and evaluation are the subject of ISO 11844-2. Measurement of environmental parameters affecting indoor corrosivity is the subject
Korrosion von Metallen und Legierungen - Einteilung der Korrosivität in Räumen mit geringer Korrosivität - Teil 1: Bestimmung und Abschätzung der Korrosivität in Räumen (ISO 11844-1:2006)
Dieser Teil von ISO 11844 behandelt die Korrosivitätseinteilung der gering korrosiven Atmosphären in
Innenräumen.
Das Ziel dieses Teils von ISO 11844 ist
⎯ die Beschreibung der gering korrosiven Atmosphären in Innenräumen, die Metalle und metallische
Überzüge während der Lagerung, des Transports, des Einbaus oder des Betriebs beeinflussen kann;
⎯ die Festlegung einer logischen Einteilung der Korrosivität in Innenräumen und
⎯ die Festlegung von Verfahren zur Bestimmung und Abschätzung der Korrosivitätskategorien in
Innenräumen.
Dieser Teil von ISO 11844 legt fest, wie die korrosive Belastung technischer Metalle nach einer bestimmten
Auslagerungsdauer zur Bestimmung der Korrosivitätskategorie für eine Atmosphäre in Innenräumen mit
geringer Korrosivität angewendet wird.
Dieser Teil von ISO 11844 legt die Korrosivitätskategorien für die Atmosphäre in Innenräumen durch
Bestimmung der korrosiven Belastung von Standardproben fest.
Dieser Teil von ISO 11844 gibt wichtige Parameter für die Atmosphäre in Innenräumen an, die als Grundlage
für eine Abschätzung der Korrosivität in Innenräumen verwendet werden können.
Die Auswahl eines Verfahrens zur Bestimmung der korrosiven Belastung, die Beschreibung der
Standardproben, die Auslagerungsbedingungen für die Proben und die Auswertung werden in ISO 11844-2
behandelt. Die Messung der Umgebungsparameter, die Einfluss auf die Innenraumkorrosivität nehmen, wird
in ISO 11844-3 erfasst.
Corrosion des métaux et alliages - Classification de la corrosivité faible des atmospheres d'intérieur - Partie 1: Détermination et estimation de la corrosivité des atmospheres d'intérieur (ISO 11844-1:2006)
L'ISO 11844-1:2006 traite de la classification des atmosphères d'intérieur à faible corrosivité.
L'ISO 11844-1:2006 vise à caractériser les environnements atmosphériques d'intérieur à faible corrosivité qui peuvent avoir une incidence sur les métaux et les revêtements métalliques au cours du stockage, du transport, de l'installation ou de l'utilisation, à établir une méthode cohérente de classification de la corrosivité des atmosphères d'intérieur et à prescrire des procédures de détermination et d'appréciation des catégories de corrosivité des atmosphères d'intérieur.
L'ISO 11844-1:2006 spécifie des métaux techniques dont l'attaque de corrosion, au terme d'une durée d'exposition définie, sert à déterminer les catégories de corrosivité des atmosphères d'intérieur à faible corrosivité.
L'ISO 11844-1:2006 définit les catégories de corrosivité des atmosphères d'intérieur en fonction de l'attaque de corrosion qu'elles provoquent sur des éprouvettes normalisées.
L'ISO 11844-1:2006 indique des paramètres importants des atmosphères d'intérieur pouvant servir de base à une appréciation de leur corrosivité.
Korozija kovin in zlitin - Klasifikacija notranjih atmosfer z nizko korozivnostjo - 1. del: Določanje in ocenjevanje notranje korozivnosti (ISO 11844-1:2006)
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Corrosion of metals and alloys - Classification of low corrosivity of indoor atmospheres - Part 1: Determination and estimation of indoor corrosivity (ISO 11844-1:2006)Corrosion des métaux et alliages - Classification de la corrosivité faible des atmospheres d'intérieur - Partie 1: Détermination et estimation de la corrosivité des atmospheres d'intérieur (ISO 11844-1:2006)77.060Korozija kovinCorrosion of metalsICS:SIST EN ISO 11844-1:2008enTa slovenski standard je istoveten z:EN ISO 11844-1:200801-julij-2008SIST EN ISO 11844-1:2008SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN ISO 11844-1April 2008ICS 77.060 English VersionCorrosion of metals and alloys - Classification of low corrosivityof indoor atmospheres - Part 1: Determination and estimation ofindoor corrosivity (ISO 11844-1:2006)Corrosion des métaux et alliages - Classification de lacorrosivité faible des atmosphères d'intérieur - Partie 1:Détermination et estimation de la corrosivité desatmosphères d'intérieur (ISO 11844-1:2006)Korrosion von Metallen und Legierungen - Einteilung derKorrosivität in Räumen mit geringer Korrosivität - Teil 1:Bestimmung und Abschätzung der Korrosivität in Räumen(ISO 11844-1:2006)This European Standard was approved by CEN on 21 March 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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 and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2008 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 11844-1:2008: E
EN ISO 11844-1:2008 (E) 2 Contents Page Foreword.3
EN ISO 11844-1:2008 (E) 3 Foreword The text of ISO 11844-1:2006 has been prepared by Technical Committee ISO/TC 156 “Corrosion of metals and alloys” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 11844-1:2008 by 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 October 2008, and conflicting national standards shall be withdrawn at the latest by October 2008. 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. 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, 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 and the United Kingdom. Endorsement notice The text of ISO 11844-1:2006 has been approved by CEN as a EN ISO 11844-1:2008 without any modification.
Reference numberISO 11844-1:2006(E)© ISO 2006
INTERNATIONAL STANDARD ISO11844-1First edition2006-03-15Corrosion of metals and alloys — Classification of low corrosivity of indoor atmospheres — Part 1: Determination and estimation of indoor corrosivity Corrosion des métaux et alliages — Classification de la corrosivité faible des atmosphères d'intérieur — Partie 1: Détermination et estimation de la corrosivité des atmosphères d'intérieur
ISO 11844-1:2006(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
©
ISO 2006 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
copyright@iso.org Web
www.iso.org Published in Switzerland
ii © ISO 2006 – All rights reserved
ISO 11844-1:2006(E) © ISO 2006 – All rights reserved iiiContents Page Foreword.iv Introduction.v 1 Scope.1 2 Normative references.1 3 Terms and definitions.2 4 Symbols and abbreviations.2 5 Classification of corrosivity.3 5.1 General.3 5.2 Categories of indoor corrosivity.3 6 Determination of indoor atmospheric corrosivity.3 7 Characterization of indoor atmospheres with respect to indoor corrosivity.3 7.1 General.3 7.2 Estimation of indoor corrosivity.4 Annex A (informative)
Relation between ISO, IEC and ISA classification systems.6 Annex B (informative)
Outdoor and indoor concentrations of some of the most important pollutants in different types of environments.9 Annex C (informative)
General characterisation of metal corrosion in indoor atmospheres.10 Annex D (informative)
Guideline for estimation of indoor corrosivity.13 Bibliography.16
ISO 11844-1:2006(E) iv © ISO 2006 – All rights reserved 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 11844-1 was prepared by Technical Committee ISO/TC 156, Corrosion of metals and alloys. ISO 11844 consists of the following parts, under the general title Corrosion of metals and alloys — Classification of low corrosivity of indoor atmospheres: ⎯ Part 1: Determination and estimation of indoor corrosivity ⎯ Part 2: Determination of corrosion attack in indoor atmospheres ⎯ Part 3: Measurement of environmental parameters affecting indoor corrosivity
ISO 11844-1:2006(E) © ISO 2006 – All rights reserved vIntroduction Metals, alloys and metallic coatings are subject to atmospheric corrosion under the impact of air humidity, especially when gaseous and solid substances of atmospheric pollution co-impact. Corrosivity data are of fundamental importance for derivation of suitable corrosion protection, or for evaluation of serviceability of metal elements of a product. ISO 9223 classifies the atmospheric environment into 5 corrosivity categories. Low-corrosivity indoor atmospheres are indoor atmospheres with C 1 (very low) or C 2 (low) corrosivity categories according to ISO 9223. The classification in ISO 9223 is too broad for some purposes in low-corrosivity indoor atmospheres, e.g. places where electronic devices, sophisticated technical products, or works of art and historical objects are stored. For such purposes, it is necessary to subdivide the corrosivity categories C 1 (very low) and C 2 (low) into indoor corrosivity categories in this part of ISO 11844. The evaluation of low-corrosivity indoor atmospheres can be accomplished by direct determination of corrosion attack of selected metals (see ISO 11844-2) or by measurement of environmental parameters (see ISO 11844-3) which may cause corrosion on metals and alloys. This part of ISO 11844 describes general procedures for derivation and estimation of indoor corrosivity categories. A general approach to classification of corrosivity in indoor atmospheres is given in the scheme shown in Figure 1.
ISO 11844-1:2006(E) vi © ISO 2006 – All rights reserved
Figure 1 — Scheme for classification of low corrosivity in indoor atmospheres
INTERNATIONAL STANDARD ISO 11844-1:2006(E) © ISO 2006 – All rights reserved 1Corrosion of metals and alloys — Classification of low corrosivity of indoor atmospheres — Part 1: Determination and estimation of indoor corrosivity 1 Scope This part of ISO 11844 deals with the classification of low corrosivity of indoor atmospheres. The aim of this part of ISO 11844 is ⎯ to characterise indoor atmospheric environments of low corrosivity that can affect metals and metallic coatings during storage, transport, installation or operational use, ⎯ to set a consistent way of indoor corrosivity classification, and ⎯ to prescribe procedures for derivation and estimation of indoor corrosivity categories. This part of ISO 11844 specifies technical metals, whose corrosion attack after a defined exposure period is used for determination of corrosivity categories of indoor atmospheres of low corrosivity. This part of ISO 11844 defines corrosivity categories of indoor atmospheres according to corrosion attack on standard specimens. This part of ISO 11844 indicates important parameters of indoor atmospheres that can serve as a basis for an estimation of indoor corrosivity. Selection of a method for determination of corrosion attack, description of standard specimens, its exposure conditions and evaluation are the subject of ISO 11844-2. Measurement of environmental parameters affecting indoor corrosivity is the subject of ISO 11844-3. 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 9223:1992, Corrosion of metals and alloys — Corrosivity of atmosphere — Classification ISO 11844-2:2005, Corrosion of metals and alloys — Classification of low corrosivity of indoor atmospheres — Part 2: Determination of corrosion attack in indoor atmospheres
ISO 11844-1:2006(E) 2 © ISO 2006 – All rights reserved ISO 11844-3:—1), Corrosion of metals and alloys — Classification of low corrosivity of indoor atmospheres — Part 3: Measurement of environmental parameters affecting indoor corrosivity IEC 60654-4:1987, Operating conditions for industrial-process measurement and control equipment. Part 4: Corrosive and erosive influences 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 corrosivity of atmospheres ability of the atmosphere to cause corrosion in a given corrosion system (e.g. atmospheric corrosion of a given metal or alloy) [ISO 9223:1992, definition 3.1] 3.2 temperature-humidity complex combined effect of temperature and relative humidity on the corrosivity of the atmosphere [ISO 9223:1992, definition 3.5] 3.3 time of wetness period during which a metallic surface is covered by adsorptive and/or liquid films of electrolyte that are capable of causing atmospheric corrosion [ISO 9223:1992, definition 3.2] 3.3.1 calculated time of wetness time of wetness estimated from the temperature-humidity complex [ISO 9223:1992, definition 3.2.1] 3.3.2 experimental time of wetness time of wetness indicated directly by various measuring systems [ISO 9223:1992, definition 3.2.2] 3.4 atmospheric pollution specific corrosion-active substances, gases or suspended particles in the air (both natural and the result of human activity) 4 Symbols and abbreviations IC corrosivity categories of indoor atmospheres. rcorr corrosion rate derived from mass-loss measurement after an exposure of one year. rmi rate of mass increase after an exposure of one year.
1) To be published.
ISO 11844-1:2006(E) © ISO 2006 – All rights reserved 35 Classification of corrosivity 5.1 General The corrosivity of indoor atmospheres can be classified either by determination of the corrosion attack on standard specimens of selected standard metals as given in Clause 6 or, where this is not possible, by estimation of corrosivity based on the knowledge of humidity, temperature and pollution conditions as described in Clause 7 and informative Annexes B, C and D. Estimation of corrosivity as described in 7.2. and Annexes C and D may lead to wrong conclusions. Therefore, the determination of corrosivity by measurement of the corrosion attack on standard specimens is strongly recommended. 5.2 Categories of indoor corrosivity For the purpose of this part of ISO 11844, indoor atmospheres are classified into 5 corrosivity categories denoted IC 1 to IC 5. The classification is given in Table 1. Table 1 — Corrosivity categories of indoor atmospheres Indoor corrosivity category IC 1 Very low indoor corrosivity IC 2 Low indoor corrosivity IC 3 Medium indoor corrosivity IC 4 High indoor corrosivity IC 5 Very high indoor corrosivity 6 Determination of indoor atmospheric corrosivity The determination of corrosivity of indoor atmospheres is based on measurements of corrosion attack on standard specimens of four reference metals after an exposure for one year in accordance with ISO 11844-2. From the mass loss or mass increase, the indoor corrosivity category for each metal is determined from Table 2. Metals complement each other in the classification of indoor corrosivity for a given environment. 7 Characterization of indoor atmospheres with respect to indoor corrosivity 7.1 General Environmental characteristics are informative and allow assessment of specific corrosion effects with regard to individual metals and metallic coatings. Methods for characterization and measurement of environmental parameters in indoor atmospheres are given in ISO 11844-3. This method of corrosivity estimation is, in many cases, oversimplified and may give misleading results. An estimation of corrosivity is based on ⎯ climatic influences (outdoor situation including pollution), ⎯ indoor microclimate influences, and ⎯ indoor gaseous and particle pollution.
ISO 11844-1:2006(E) 4 © ISO 2006 – All rights reserved The corrosivity of an indoor atmosphere increases with higher humidity and depends on the type and level of pollution. Frequency of variation of relative humidity (RH) and temperature (T) in intervals, and frequency and time of condensation, are important characteristics. Indoor atmospheres are polluted by the components from external and internal sources. Typical pollutants are SO2, NO2, O3, H2S, Cl2, NH3, HCl, HNO3, Cl–, NH4+, organic acids, aldehydes and particles (see informative Annex B). Corrosion for many of the metals is significantly influenced by the synergistic effects of different pollutants. Metals and metallic coatings have their own specific corrosion behaviour in indoor atmospheres (see informative Annex C). 7.2 Estimation of indoor corrosivity 7.2.1 Characterization of the environment summarised in a guideline (Annex D), forms a basis for indoor corrosivity estimation. Description of typical environments related to the estimation of indoor corrosivity categories is presented in Table D.3. 7.2.2 Important factors of indoor corrosion are defined as the highest levels of measured environmental parameters and as a description of oth
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.