introduction
ISO (International Organization for Standardization) is a global federation of national standards bodies (ISO member bodies). The development of international standards is usually carried out through ISO technical committees. Each member group interested in a subject for which a technical committee has been established has the right to be represented on the Committee. International organizations, governments and non-governmental organizations in contact with ISO are also involved in this work. ISO works closely with the International Electrotechnical Commission (IEC) on all matters of electrical standardization.

Part 1 of the ISO/IEC Directive describes the procedures used to develop this document and for further maintenance. In particular, attention should be paid to the different approval criteria required for different types of ISO documents. This document has been drafted in accordance with the editorial rules of ISO/IEC Directive Part 2 (see iso.org/directives).

Please note that some elements of this document may be the subject of patent rights. ISO is not responsible for identifying any or all such patents. Details of any patent rights identified during the development of the document will be found in the introduction and/or list of ISO Patent declarations received (see iso.org/patents).

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ISO 11844-3-2020 Corrosion of metals and alloys – Classification of low atmospheric corrosion in chambers – Part 3: Measurement of environmental parameters affecting corrosion in chambers

Voluntary interpretation, related standards and conformity assessment related ISO specific terminology and express the meaning of and the ISO in the technical barriers to trade (TBT) adhere to the principle of the world trade organization (WTO) information, please see the iso.org/iso/foreword.html.

This document has been prepared by the ISO/TC 156 Technical Committee on Corrosion of Metals and Alloys.

The 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:

— Updated normative reference documents;

The reference to ISO 16000 in Article 5 has been added;

– Updated detection limits in 7.3.1 and 7.3.2;

A new article 9 has been added.

A list of all the parts in the ISO 11844 series can be found on the ISO website.

Any feedback or questions on this document should be referred to the user’s national standards body. A complete list of these institutions can be found at iso.org/members.html.

ISO 11844-3-2020 Corrosion of metals and alloys – Classification of low atmospheric corrosion in chambers – Part 3: Measurement of environmental parameters affecting corrosion in chambers

introduce
This document deals with environmental parameters used to characterize indoor atmospheres and measurement methods.

The environmental parameters used to characterize the indoor atmosphere include more air pollutants than are typically used to characterize the outdoor environment.

The measurement of environmental parameters is a way of characterizing the corrosiveness of the indoor atmosphere, and it is always necessary to measure environmental parameters if it is necessary to consider measures to reduce corrosiveness.

1 Scope of Application
This document specifies methods for measuring environmental parameters that are used to classify the corrosiveness of indoor atmospheres to metals and alloys.

2 Normative reference documents
When the following documents are referenced in the text, some or all of them constitute the requirements of this document. For dated references, only the cited version applies. For undated citations, a new version of the referenced document (including any revisions) applies.

ISO 7708, Air quality – Definition of particle size fractions for health-related sampling

EN 12341, Ambient air – Standard gravimetric method for the determination of PM 10 or PM 2.5 mass concentrations of suspended particulate matter

ISO 11844-3-2020 Corrosion of metals and alloys – Classification of low atmospheric corrosion in chambers – Part 3: Measurement of environmental parameters affecting corrosion in chambers

3 Terms and definitions
No terms and definitions are listed in this document.

ISO and IEC maintain terminology databases for standardization at the following addresses:

– ISO online browsing platform iso.org/obp

– IEC Electropedia: available at electropedia.org/

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