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 11844-2-2020 Corrosion of metals and alloys – Classification of low corrosion in indoor atmospheres – Part 2: Determination of corrosion in indoor atmospheres

Explanations of the relevant standards of voluntary, ISO specific terms related to conformity assessment and the expression of meaning, and the ISO in the technical barriers to trade (TBT) adhere to the principle of the world trade organization (WTO) information, please refer to the iso.org/iso/foreword.html.

This document, prepared by the ISO/TC 156 Technical Committee on Corrosion of Metals and Alloys in collaboration with the CEN/TC 262 Technical Committee on Metals and Other Inorganic Coatings of the European Committee for Standardization (CEN), covers corrosion protection and corrosion testing of metals and alloys. According to the Technical Cooperation Agreement between ISO and CEN (Vienna Agreement).

The second edition cancels and replaces the first edition (ISO 11844-2:2005), which has been technically revised. The main changes compared with the previous edition are as follows:

– Lead has been used as a standard sample for high sensitivity to vaporous organic acids;

— Appendix D was 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 11844-2-2020 Corrosion of metals and alloys – Classification of low corrosion in indoor atmospheres – Part 2: Determination of corrosion in indoor atmospheres

introduce
This document describes the standard samples, exposures and assessments used to derive categories of indoor corrosivity.

With the current state of knowledge, determining corrosive erosion is the most reliable and often an economic way to assess corrosivity, taking into account all major local environmental impacts.

1 Scope of Application
This document specifies methods for determining corrosion rates using standard metal samples in low corrosive indoor atmospheres. For this direct method of assessing corrosion, different sensitive methods can be applied using standard samples of the following metals: copper, silver, zinc, steel, and lead. The values obtained from the measurements are used as a classification standard for determining indoor atmospheric corrosivity.

2 Normative reference documents
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 terminology databases for standardization at the following addresses:

– ISO online browsing platform: org/obp

– IEC Electropedia: available at electropedia.org/

ISO 11844-2-2020 Corrosion of metals and alloys – Classification of low corrosion in indoor atmospheres – Part 2: Determination of corrosion in indoor atmospheres

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