ISO 19735:2023 金属および合金の腐食 — 大気の腐食性 — 腐食のリスクが増加する領域のマッピング | ページ 2

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 document 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 ).

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This document was prepared by Technical Committee ISO/TC 156, Corrosion of metals and alloys.

Introduction

Corrosion maps have become more frequent, and to ensure transparency and ease of comparison of corrosion maps, this work was initiated.

This document describes procedures for calculating corrosivity maps based on arrays of environmental data organised in a grid and using a dose-response function. Corrosivity maps based on dose-response functions can be very useful for illustrating geographical variations, trends in time and the relative importance of different underlying parameters (climate, pollution) and to communicate these results to those not working in the field of corrosion. The result for an individual grid cell of a corrosivity map is, however, very uncertain. If a corrosivity assessment for a single location is needed, it is recommended to also consider direct measurements of corrosion according to ISO 9223.

1 Scope

This document gives guidelines for producing corrosivity maps and maps related to increased risk of corrosion in outdoor open atmospheres, but not sheltered or semi-sheltered positions.

The maps are calculated based on environmental data using specific relationships, so-called dose-response functions. Other means of producing corrosivity maps, for example using detailed measurements of corrosion and subsequent interpolation of measured corrosion values, are not within the scope of this document.

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.

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

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

Bibliography