ASTM G140-02(2019)

Standard Test Method for Determining Atmospheric Chloride Deposition Rate by Wet Candle Method

SIGNIFICANCE AND USE
3.1 This test method is capable of generating quantitative values of atmospheric chloride deposition specifying milligrams of chloride ions per square metre per day (or other units derived from such values).
Note 1: Chlorides in the atmosphere exist as a suspension of liquid droplets or solid particles. They are transported to solid surfaces by gravity, wind, or brownian motions. These transport mechanisms are direction-sensitive so that a vertical cylinder will not necessarily receive the same flux as a horizontal plate, or objects with different sizes and orientations. Therefore, the use of this approach to provide an indication of the deposition of chlorides on objects in atmospheric exposures may not be quantitatively accurate; however, this technique has been successful in classifying the severity of exposure in a variety of marine locations.  
3.2 The sites where samples are to be taken and the sampling time periods should be established. A continuous program of monthly or 30-day exposures is recommended for site characterization. Seasonal monitoring may be performed if there are specific periods of interest.
SCOPE
1.1 This test method covers a wet candle device and its use in measuring atmospheric chloride deposition (amount of chloride salts deposited from the atmosphere on a given area per unit time).  
1.2 Data on atmospheric chloride deposition can be useful in classifying the corrosivity of a specific area, such as an atmospheric test site. Caution must be exercised, however, to take into consideration the season because airborne chlorides vary widely between seasons.  
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 30-Sep-2019
• ICS: 71.040.50 - Physicochemical methods of analysis
• ICS: 77.060 - Corrosion of metals
• Technical Committee: G01 - Corrosion of Metals
• Drafting Committee: G01.04 - Corrosion of Metals in Natural Atmospheric and Aqueous Environments

Relations

• Replaces: ASTM G140-02(2014) - Standard Test Method for Determining Atmospheric Chloride Deposition Rate by Wet Candle Method
• Effective Date: 01-Oct-2019
• Referred By: ASTM G91-11(2018) - Standard Practice for Monitoring Atmospheric SO<inf>2</inf> Deposition Rate for Atmospheric Corrosivity Evaluation
• Effective Date: 01-Oct-2019
• Referred By: ASTM G50-20 - Standard Practice for Conducting Atmospheric Corrosion Tests on Metals
• Effective Date: 01-Oct-2019

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: G140 − 02 (Reapproved 2019)
Standard Test Method for
Determining Atmospheric Chloride Deposition Rate by Wet
1
Candle Method
This standard is issued under the fixed designation G140; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2.2 ISO Standard:
ISO 9225Corrosion of Metals and Alloys. Aggressivity of
1.1 This test method covers a wet candle device and its use
Atmospheres—Methods of Measurement of Pollution
in measuring atmospheric chloride deposition (amount of
3
Data
chloride salts deposited from the atmosphere on a given area
per unit time).
3. Significance and Use
1.2 Data on atmospheric chloride deposition can be useful
3.1 This test method is capable of generating quantitative
in classifying the corrosivity of a specific area, such as an
values of atmospheric chloride deposition specifying milli-
atmospheric test site. Caution must be exercised, however, to
grams of chloride ions per square metre per day (or other units
take into consideration the season because airborne chlorides
derived from such values).
vary widely between seasons.
NOTE 1—Chlorides in the atmosphere exist as a suspension of liquid
1.3 This standard does not purport to address all of the
droplets or solid particles. They are transported to solid surfaces by
safety concerns, if any, associated with its use. It is the
gravity, wind, or brownian motions. These transport mechanisms are
responsibility of the user of this standard to establish appro- direction-sensitive so that a vertical cylinder will not necessarily receive
the same flux as a horizontal plate, or objects with different sizes and
priate safety, health, and environmental practices and deter-
orientations. Therefore, the use of this approach to provide an indication
mine the applicability of regulatory limitations prior to use.
ofthedepositionofchloridesonobjectsinatmosphericexposuresmaynot
1.4 This international standard was developed in accor-
be quantitatively accurate; however, this technique has been successful in
dance with internationally recognized principles on standard-
classifying the severity of exposure in a variety of marine locations.
ization established in the Decision on Principles for the
3.2 The sites where samples are to be taken and the
Development of International Standards, Guides and Recom-
sampling time periods should be established. A continuous
mendations issued by the World Trade Organization Technical
program of monthly or 30-day exposures is recommended for
Barriers to Trade (TBT) Committee.
sitecharacterization.Seasonalmonitoringmaybeperformedif
there are specific periods of interest.
2. Referenced Documents
2
2.1 ASTM Standards:
4. Apparatus
D1193Specification for Reagent Water
4.1 Components—The components needed to construct one
D4458Test Method for Chloride Ions in Brackish Water,
wet candle device are as follows:
Seawater, and Brines
4.1.1 Erlenmeyer Flask, narrow mouth, 500 mL, (glass or
G92Practice for Characterization ofAtmospheric Test Sites
polypropylene). Other size flasks may be used, but dimensions
in Fig. 1 will have to be adjusted accordingly.
1
This test method is under the jurisdiction of ASTM Committee G01 on
NOTE 2—Polypropylene flasks are recommended during threat of
Corrosion of Metals and is the direct responsibility of Subcommittee G01.04 on
freezing weather.
Corrosion of Metals in Natural Atmospheric and Aqueous Environments.
Current edition approved Oct. 1, 2019. Published October 2019. Originally
4.1.2 Glass Test Tube, general purpose, 16 by 150-mm
approved in 1996. Last previous edition approved in 2014 as G140–02 (2014).
length.
DOI: 10.1520/G0140-02R19.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036, http://www.ansi.org.
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G140 − 02 (2019)
NOTE 1—Dimensions are in millimetres (mm).
FIG. 1 Wet Candle Chloride Apparatus
4.1.3 SolidRubberorNeopreneStopper,No.7,diametertop 4.3.1 The rubber stopper must be modified.
38 mm, bottom 30 mm. 4.3.1.1 Inthecenter,boreahole15mmi
...