SIST EN ISO 11844-3:2020

Corrosion of metals and alloys - Classification of low corrosivity of indoor atmospheres - Part 3: Measurement of environmental parameters affecting indoor corrosivity (ISO 11844-3:2020)

This document specifies methods for measuring the environmental parameters used to classify the corrosivity of indoor atmospheres on metals and alloys.

Korrosion von Metallen und Legierungen - Einteilung der Korrosivität in Räumen mit geringer Korrosivität - Teil 3: Messung der Umgebungsparameter, die Korrosivität in Räumen beeinflussen (ISO 11844-3:2020)

Dieses Dokument legt Verfahren zum Messen der Umgebungsparameter fest, die dazu verwendet werden, die Korrosivität der Atmosphäre in Innenräumen von Metallen und Legierungen zu klassifizieren.

Corrosion des métaux et alliages - Classification de la corrosivité faible des atmosphères d'intérieur - Partie 3: Mesurage des paramètres environnementaux affectant la corrosivité des atmosphères d'intérieur (ISO 11844-3:2020)

Le présent document spécifie des méthodes de mesure des paramètres environnementaux utilisés pour la classification de la corrosivité des atmosphères d'intérieur pour les métaux et alliages.

Korozija kovin in zlitin - Klasifikacija notranjih atmosfer z nizko korozivnostjo - 3. del: Merjenje okoljskih parametrov, ki vplivajo na korozivnost v zaprtih prostorih (ISO 11844-3:2020)

Ta dokument določa metode za merjenje okoljskih parametrov, ki se uporabljajo za klasifikacijo notranjih atmosfer, ki vplivajo na korozivnost kovin in zlitin v zaprtih prostorih.

General Information

• Status: Published
• Public Enquiry End Date: 24-Jan-2019
• Publication Date: 13-Feb-2020
• ICS: 77.060 - Corrosion of metals
• Technical Committee: IPKZ - Protection of metals against corrosion
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 06-Feb-2020
• Due Date: 12-Apr-2020
• Completion Date: 14-Feb-2020
• Ref Project: EN ISO 11844-3:2020 - Corrosion of metals and alloys - Classification of low corrosivity of indoor atmospheres - Part 3: Measurement of environmental parameters affecting indoor corrosivity (ISO 11844-3:2020)

Relations

• Replaces: SIST EN ISO 11844-3:2008 - Corrosion of metals and alloys - Classification of indoor atmospheres with low corrosivity - Part 3: Classification and measurement of environmental parameters affecting indoor corrosivity (ISO 11844-3:2006)
• Effective Date: 01-Mar-2020

Overview

EN ISO 11844-3:2020 - published by CEN and identical to ISO 11844-3:2020 - specifies methods for measuring environmental parameters used to classify the corrosivity of indoor atmospheres for metals and alloys. Part 3 of the ISO 11844 series focuses on quantitative measurement techniques (humidity, gases, particles, deposition and air flow) that support the classification of indoor corrosion risk and selection of appropriate mitigation or material choices.

Key topics and technical requirements

• Measured parameter groups
  • Humidity and temperature (including the temperature–humidity complex and condensation frequency).
  • Airborne gas contaminants (measurement options and placement of instruments).
  • Airborne particle contaminants (volumetric and deposit measurements - reference to PM2.5/PM10 standards).
  • Dry deposition velocity and air flow (to link airborne concentrations with surface deposition and corrosion risk).
• Measurement methods described
  • Continuous gas-measuring instruments for real‑time monitoring.
  • Active samplers (pump-driven sampling with subsequent analysis and calculation).
  • Passive samplers (diffusive or badge-type samplers with defined uptake rates).
  • Gas‑deposition equipment to estimate deposition rates on surfaces.
  • Volumetric particulate sampling and surface deposit sampling (referencing ISO 7708 and EN 12341 where applicable).
• Performance and procedural notes
  • Guidance on placing measuring equipment and sampling duration.
  • Updated detection limits and references to the ISO 16000 series for indoor air pollutant sampling strategies.
  • Emphasis on pre-survey knowledge of potential pollutant sources to define the measurement strategy.

Applications and who uses this standard

EN ISO 11844-3:2020 is used by professionals who need evidence-based characterization of indoor corrosivity:

• Corrosion engineers and testing laboratories - for standardized environmental monitoring and reporting.
• Facilities and asset managers - in museums, archives, data centers, and industrial plants to protect metal artifacts, electronic equipment and infrastructure.
• Conservation scientists and museums - to assess display and storage environments and guide preventive conservation.
• HVAC and building-envelope engineers - to design ventilation and control strategies that limit corrosive atmospheres.
• Coating and materials specialists - to select materials or coatings based on measured indoor corrosivity.

Related standards

• ISO 11844 series (classification framework and specimen-based corrosion testing)
• ISO 16000 series (indoor air sampling strategies and VOC/NO2 methods)
• ISO 7708 (particle size fraction definitions)
• EN 12341 (gravimetric PM measurement for ambient particulate matter)

EN ISO 11844-3:2020 provides actionable, standardized measurement approaches for assessing indoor corrosivity - essential for risk assessment, material selection and mitigation planning in environments where metal corrosion is a concern.

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2020
Nadomešča:
SIST EN ISO 11844-3:2008
Korozija kovin in zlitin - Klasifikacija notranjih atmosfer z nizko korozivnostjo - 3.
del: Merjenje okoljskih parametrov, ki vplivajo na korozivnost v zaprtih prostorih
(ISO 11844-3:2020)
Corrosion of metals and alloys - Classification of low corrosivity of indoor atmospheres -
Part 3: Measurement of environmental parameters affecting indoor corrosivity (ISO
11844-3:2020)
Korrosion von Metallen und Legierungen - Einteilung der Korrosivität in Räumen mit
geringer Korrosivität - Teil 3: Messung der Umgebungsparameter, die Korrosivität in
Räumen beeinflussen (ISO 11844-3:2020)
Corrosion des métaux et alliages - Classification de la corrosivité faible des atmosphères
d'intérieur - Partie 3: Mesurage des paramètres environnementaux affectant la
corrosivité des atmosphères d'intérieur (ISO 11844-3:2020)
Ta slovenski standard je istoveten z: EN ISO 11844-3:2020
ICS:
77.060 Korozija kovin Corrosion of metals
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 11844-3
EUROPEAN STANDARD
NORME EUROPÉENNE
January 2020
EUROPÄISCHE NORM
ICS 77.060 Supersedes EN ISO 11844-3:2008
English Version
Corrosion of metals and alloys - Classification of low
corrosivity of indoor atmospheres - Part 3: Measurement
of environmental parameters affecting indoor corrosivity
(ISO 11844-3:2020)
Corrosion des métaux et alliages - Classification de la Korrosion von Metallen und Legierungen - Einteilung
corrosivité faible des atmosphères d'intérieur - Partie der Korrosivität in Räumen mit geringer Korrosivität -
3: Mesurage des paramètres environnementaux Teil 3: Messung der Umgebungsparameter, die
affectant la corrosivité des atmosphères d'intérieur Korrosivität in Räumen beeinflussen (ISO 11844-
(ISO 11844-3:2020) 3:2020)
This European Standard was approved by CEN on 21 December 2019.

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 11844-3:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 11844-3:2020) 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 July 2020, and conflicting national standards shall be
withdrawn at the latest by July 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 11844-3:2008.
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 11844-3:2020 has been approved by CEN as EN ISO 11844-3:2020 without any
modification.
INTERNATIONAL ISO
STANDARD 11844-3
Second edition
2020-01
Corrosion of metals and alloys —
Classification of low corrosivity of
indoor atmospheres —
Part 3:
Measurement of environmental
parameters affecting indoor
corrosivity
Corrosion des métaux et alliages — Classification de la corrosivité
faible des atmosphères d'intérieur —
Partie 3: Mesurage des paramètres environnementaux affectant la
corrosivité des atmosphères d'intérieur
Reference number
ISO 11844-3:2020(E)
©
ISO 2020
ISO 11844-3:2020(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
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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved

ISO 11844-3:2020(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Environmental parameters . 1
6 Humidity and temperature parameters. 2
6.1 Relative humidity . 2
6.2 Temperature . 2
6.3 Temperature–humidity complex . 2
7 Airborne gas contaminants . 2
7.1 Principle . 2
7.2 Placing of measuring equipment . 3
7.2.1 General. 3
7.2.2 Continuous gas-measuring instruments . 3
7.2.3 Active sampler. 3
7.2.4 Passive sampler. 3
7.2.5 Gas-deposition equipment . 3
7.3 Measuring methods and duration . 3
7.3.1 Continuous measurement . 3
7.3.2 Measurement and calculation with the active sampler . 3
7.3.3 Measurement and calculation with the passive sampler . 4
7.3.4 Measurement and calculation of deposition rate of gas pollution . 5
8 Airborne particle contaminants . 6
8.1 Principle . 6
8.2 Volumetric measurements . 6
8.3 Measurement of particle deposits . 6
9 Dry deposition velocity and measurements of air flow . 7
Annex A (informative) Reagents used for both passive and active samplers .8
Bibliography .10
ISO 11844-3:2020(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.
This second edition cancels and replaces the first edition (ISO 11844-3:2006), which has been
technically revised. The main changes compared with the previous edition are as follows:
— the normative references have been updated;
— a reference to ISO 16000 in Clause 5 has been added;
— the detection limits in 7.3.1 and 7.3.2 have been updated;
— a new Clause 9 has been added.
A list of all parts in the ISO 11844 series can be found on the ISO website.
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 11844-3:2020(E)
Introduction
This document deals with environmental parameters for the characterization of indoor atmospheres
and methods of measurement.
The environmental parameters for the characterization of indoor atmospheres include more airborne
contaminants than are normally used for the characterization of the outdoor environment.
Measurement of environmental parameters is a way of characterizing the corrosivity of the indoor
atmosphere and will always be required if it is necessary to consider measures for reducing the
corrosivity.
INTERNATIONAL STANDARD ISO 11844-3:2020(E)
Corrosion of metals and alloys — Classification of low
corrosivity of indoor atmospheres —
Part 3:
Measurement of environmental parameters affecting
indoor corrosivity
1 Scope
This document specifies methods for measuring the environmental parameters used to classify the
corrosivity of indoor atmospheres on metals and alloys.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 7708, Air quality — Particle size fraction definitions for health-related sampling
EN 12341, Ambient air — Standard gravimetric measurement method for the determination of the PM or
PM mass concentration of suspended particulate matter
2,5
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 Principle
Different combinations of parameters affect the corrosivity of indoor atmospheres. Knowledge about
possible sources of environmental effects shall be obtained before decisions regarding the type
of measurements needed are taken. The characterization of indoor atmospheric corrosivity using
environmental parameters is more complicated than measuring the corrosivity with metal specimens.
However, in many cases, the measurement of environmental parameters can give a good indication of
how to establish the corrosivity of an environment and will, in combination with the information given
in ISO 11844-1, give a good indication of the corrosivity categories for the materials in the select
...