ISO 9225:2012
Corrosion of metals and alloys — Corrosivity of atmospheres — Measurement of environmental parameters affecting corrosivity of atmospheres
ISO 9225:2012 specifies methods for measuring the parameters needed for corrosivity estimation used for classification of the corrosivity of atmospheres in ISO 9223.
ISO 9225:2012 specifies methods for the measurement of environmental parameters for normative corrosivity estimation based on calculated first-year corrosion rates of standard metals, and informative corrosivity estimation based on characterization of the exposure environment.
It does not describe the usual analytical techniques for the measured parameters since this depends on the available analytical techniques used in laboratories. Specific methods for deposition measurement of SO2 and Cl- deposition rates and conversional factors for comparison of different measuring methods are given.
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1 Scope
2 Normative references
3 Principle
4 Humidity and temperature parameters
4.1 Relative humidity
4.2 Temperature
5 Airborne contaminants
5.1 Principle
5.2 Placement of measurement equipment
5.2.1 Continuous gas concentration measurement instruments
5.2.2 Measurement instruments with active sampler
5.2.3 Measurement instruments with diffusive sampler
5.2.4 Deposition rate equipment
5.3 Measurement methods and duration
5.3.1 Continuous measurement
5.3.2 Measurement with active sampler
5.3.3 Measurement with diffusive sampler
5.3.4 Measurement of deposition rate of pollution
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1 Scope
2 Normative references
3 Principle
4 Humidity and temperature parameters
4.1 Relative humidity
4.2 Temperature
5 Airborne contaminants
5.1 Principle
5.2 Placement of measurement equipment
5.2.1 Continuous gas concentration measurement instruments
5.2.2 Measurement instruments with active sampler
5.2.3 Measurement instruments with diffusive sampler
5.2.4 Deposition rate equipment
5.3 Measurement methods and duration
5.3.1 Continuous measurement
5.3.2 Measurement with active sampler
5.3.3 Measurement with diffusive sampler
5.3.4 Measurement of deposition rate of pollution