ASTM-G91 › Historical Revision Information
Standard Practice for Monitoring Atmospheric SO2 Deposition Rate for Atmospheric Corrosivity Evaluation
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Scope
1.1 This practice covers a weighted average effective SO
1.2 The results of this practice correlate approximately with volumetric SO
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Significance and Use
Atmospheric corrosion of metallic materials is a function of many weather and atmospheric variables. The effect of specific corrodants, such as sulfur dioxide, can accelerate the atmospheric corrosion of metals significantly. The sulfation plate method provides a simple technique to independently monitor the level of SO2 in the atmosphere to yield a weighted average result.
Sulfation plate results may be used to characterize atmospheric corrosion test sites regarding the effective average level of SO2 in the atmosphere at these locations.
Sulfation plate testing is useful in determining microclimate, seasonal, and long term variations in the effective average level of SO2.
The results of sulfation plate tests may be used in correlations of atmospheric corrosion rates with atmospheric data to determine the sensitivity of the corrosion rate to SO2 level.
The sulfation plate method may also be used with other methods to characterize the atmosphere at sites where buildings or other construction is planned in order to determine the extent of protective measures required for metallic materials.
Keywords
atmospheric corrosion; exposures; measurement; plate preparation; sulfate analysis; sulfation plates; sulfur dioxide; ICS Number Code 13.040.20 (Ambient atmospheres)
To find similar documents by ASTM Volume:
03.02 (Corrosion of Metals; Wear and Erosion)
To find similar documents by classification:
13.040.20 (Ambient atmospheres Including indoor air)
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Document Number
ASTM-G91-97(2004)
Revision Level
1997 R04 EDITION
Status
Superseded
Modification Type
Reapproval
Publication Date
Nov. 1, 2004
Document Type
Practice
Page Count
5 pages
Committee Number
G01.04