CEN - EN ISO 9223
Corrosion of metals and alloys - Corrosivity of atmospheres - Classification, determination and estimation
|Publication Date:||1 February 2012|
|ICS Code (Corrosion of metals):||77.060|
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 is also considered an important factor for corrosion
in areas outside the temperate macroclimatic zone. The
This International Standard does not characterize the corrosivity of specific service atmospheres, e.g. atmospheres in chemical or metallurgical industries.
The classified corrosivity categories and introduced pollution levels can be directly used for technical and economical analyses of corrosion damage and for a rational choice of corrosion protection measures.