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Standard [CURRENT]

DIN EN ISO 9223:2012-05

Corrosion of metals and alloys - Corrosivity of atmospheres - Classification, determination and estimation (ISO 9223:2012); German version EN ISO 9223:2012

German title
Korrosion von Metallen und Legierungen - Korrosivität von Atmosphären - Klassifizierung, Bestimmung und Abschätzung (ISO 9223:2012); Deutsche Fassung EN ISO 9223:2012
Publication date
2012-05
Original language
German
Pages
24

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Publication date
2012-05
Original language
German
Pages
24
DOI
https://dx.doi.org/10.31030/1876556

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Overview

This International Standard establishes a classification system for the corrosivity of atmospheric environments. It - defines corrosivity categories for the atmospheric environments by the first-year corrosion rate of standard specimens, - gives dose-response functions for normative estimation of the corrosivity category based on the calculated first-year corrosion loss of standard metals, and - makes possible an informative estimation of the corrosivity category based on knowledge of the local environmental situation. This International Standard specifies the key factors in the atmospheric corrosion of metals and alloys. These are the temperature-humidity complex, pollution by sulphur dioxide and airborne salinity. Temperature is also considered an important factor for corrosion in areas outside the temperate macroclimatic zone. The temperature-humidity complex can be evaluated in terms of time of wetness. Corrosion effects of other pollutants (ozone, nitrogen oxides, particulates) can influence the corrosivity and the evaluated one-year corrosion loss, but these factors are not considered decisive in the assessment of corrosivity according to this International Standard. This International Standard does not characterize the corrosivity of specific service atmospheres, for example, atmospheres in chemical or metallurgical industries. The classified corrosivity categories and introduced pollution levels can be directly used for technical and economic analyses of corrosion damage and for a rational choice of corrosion protection measures. This document (EN ISO 9223:2012) has been prepared by ISO/TC 156 "Corrosion of metals and alloys" (secretariat: SAC, People's Republic of China) and has been adopted within the framework of the Vienna Agreement by CEN/TC 262 "Metallic and other inorganic coatings" (secretariat: BSI, United Kingdom). The responsible German committee is Working Committee NA 062-01-71 AA "Korrosion und Korrosionsschutz" ("Corrosion and corrosion protection") at the Materials Testing Standards Committee (NMP).

Content
ICS
77.060
DOI
https://dx.doi.org/10.31030/1876556
Replacement amendments

This document replaces DIN EN 12500:2000-12 .

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