Corrosion of metals and alloys. Corrosivity of atmospheres. Measurement of environmental parameters affecting corrosivity of atmospheres (ISO 9225:2012)
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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.
Tämän julkaisun valmistelusta Suomessa vastaa Metalliteollisuuden Standardisointiyhdistys ry, puh. 09 19 231 (vaihde).
Sisällysluettelo
Foreword
Introduction
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
5.3 Measurement methods and duration
Annex A Determination of sulfur dioxide deposition rate on lead dioxide sulfation plates (normative)
Annex B Determination of sulfur dioxide deposition rate on lead dioxide sulfation cylinder (normative)
Annex C Determination of sulfur dioxide deposition rate on alkaline surfaces (normative)
Annex D Determination of chloride deposition rate by the wet candle method (normative)
Annex E Determination of chloride deposition rate by dry plate method (normative)
Annex F Comparison of chlorides and sulfur dioxide deposition rates determined by different methods (normative)
ISO 11844-3:2006 Corrosion of metals and alloys -- Classification of low corrosivity of indoor atmospheres -- Part 3: Measurement of environmental parameters affecting indoor corrosivity
ISO 9223:2012 Corrosion of metals and alloys -- Corrosivity of atmospheres -- Classification, determination and estimation
ISO 11844-3:2006 Corrosion of metals and alloys -- Classification of low corrosivity of indoor atmospheres -- Part 3: Measurement of environmental parameters affecting indoor corrosivity
ISO 9223:2012 Corrosion of metals and alloys -- Corrosivity of atmospheres -- Classification, determination and estimation