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ASTM G60-01(2007)

(Practice)

Standard Practice for Conducting Cyclic Humidity Exposures

Standard Practice for Conducting Cyclic Humidity Exposures

SIGNIFICANCE AND USE
The procedure described is used to observe the behavior of steels under exposure conditions that retard the formation of a protective type of rust. It is also used to evaluate seal coat on insulation.
This practice should not be used to rank steels that form a protective type of rust under atmospheric exposure conditions.
SCOPE
1.1 This test method covers procedures for conducting cyclic humidity tests with a corrosive dip.  It sets forth the conditions required in cyclic humidity testing.  
1.2 This practice does not prescribe the type of test specimen or exposure periods nor the interpretation to be given to the results.  
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 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 consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
31-May-2007
ICS
19.040 - Environmental testing
Technical Committee
G01 - Corrosion of Metals
Drafting Committee
G01.05 - Laboratory Corrosion Tests
Current Stage
Ref Project

Relations

Replaces
ASTM G60-01 - Standard Practice for Conducting Cyclic Humidity Exposures
Effective Date
01-Jun-2007
Replaced By
ASTM G60-01(2013) - Standard Practice for Conducting Cyclic Humidity Exposures
Effective Date
01-May-2013
Referred By
ASTM D3794-22 - Standard Guide for Testing Coil Coatings
Effective Date
01-Jun-2007
Referred By
ASTM G198-17 - Standard Test Method for Determining the Relative Corrosion Performance of Driven Fasteners in Contact with Treated Wood
Effective Date
01-Jun-2007

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ASTM G60-01(2007) - Standard Practice for Conducting Cyclic Humidity ExposuresASTM G60-01(2007) - Standard Practice for Conducting Cyclic Humidity Exposures
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ASTM G60-01(2007) - Standard Practice for Conducting Cyclic Humidity Exposures
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: G60 − 01(Reapproved 2007)
Standard Practice for
Conducting Cyclic Humidity Exposures
This standard is issued under the fixed designation G60; 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.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Apparatus
1.1 This practice covers procedures for conducting cyclic 4.1 The apparatus required for cyclic humidity exposures
humidity exposures with a corrosive dip. It sets forth the
consists of a test chamber, provisions for heating the chamber,
conditions required in cyclic humidity testing.
a humidifying tower, a drying train, a dip mechanism, provi-
sions for introducing and draining the solution, a supply of
1.2 This practice does not prescribe the type of exposure
compressed air, specimen supports, and necessary means of
specimen or exposure periods nor the interpretation to be given
control.
to the results.
4.2 The size and detailed construction of the apparatus are
1.3 The values stated in SI units are to be regarded as
optional, provided the conditions obtained meet the require-
standard. The values given in parentheses are for information
ments of this practice.
only.
1.4 This standard does not purport to address all of the 4.3 AschematicdiagramoftheapparatusisshowninFig.1.
safety concerns, if any, associated with its use. It is the
4.4 The apparatus should be capable of providing an 8-h
responsibility of the user of this standard to consult and
humidity cycle three times per day, as shown in Fig. 2, and a
establish appropriate safety and health practices and deter-
dip cycle once a day.
mine the applicability of regulatory limitations prior to use.
4.4.1 The cyclic variation of humidity can be obtained by
variation of the temperature of the water in the humidifying
2. Referenced Documents
tower. The temperature of the water is cycled thermostatically
2.1 ASTM Standards:
such that the relative humidity of air bubbling through the
D1193 Specification for Reagent Water
water at a minimum rate of 1 L/min (0.04 ft /min) will vary
G1 Practice for Preparing, Cleaning, and Evaluating Corro-
between 100 and 50 % when the temperature of the air in the
sion Test Specimens
test chamber is brought to 52 6 1°C (125 6 2°F).
4.4.2 The range of relative humidity can be extended by
3. Significance and Use
adding a drying period to the humidity cycle described above.
The minimum relative humidity shall be ≤20 % and the
3.1 The procedure described is used to observe the behavior
maximum relative humidity shall be ≥95 % for each cycle.
of steels under exposure conditions that retard the formation of
a protective type of rust. It is also used to evaluate seal coat on 4.4.3 Drops of solution which accumulate on the ceiling or
cover of the chamber shall not be permitted to fall on the
insulation.
specimens being exposed.
3.2 This practice should not be used to rank steels that form
a protective type of rust under atmospheric exposure condi-
NOTE 1—Instruments to continuously record temperature and humidity
tions. are not mandatory, but these provide the most reliable and economical
way of recording such information. In the absence of such
instrumentation, temperature and humidity measurement shall be made, at
least twice a day, at the maximum and minimum humidity in a cycle.
This practice is under the jurisdiction of ASTM Committee G01 on Corrosion
4.5 Materials of Construction:
of Metals and is the direct responsibility of Subcommittee G01.05 on Laboratory
Corrosion Tests. 4.5.1 The test chamber should be made of inert materials
CurrenteditionapprovedJune1,2007.PublishedJuly2007.Originallyapproved
suchasplastics,glass,ormetalslinedwithimperviousplastics,
in 1979. Last previous edition approved in 2001 as G60–01. DOI: 10.1520/G0060-
rubber or epoxy-type materials, or materials exhibiting equiva-
01R07.
2 lent corrosion resistance. Material of construction shall be such
Opinsky, A. J., Thomson, R. F., and Boegehold, A. L., “A Cyclic Humidity
Accelerated Corrosion Test for Sheet Steel,” ASTM Bulletin, January 1953.
that it will not affect the corrosiveness of the exposure
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
atmosphere.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
4.5.2 Thedipsolutioncontainershouldnotbeaffectedbyor
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. cause contamination of the dip solution.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
G60 − 01 (2007)
FIG. 1 Main Parts of the Cyclic Humidity Corrosion Exposure Apparatus (Schematic)
FIG. 2 Humidity Cycle (Schematic)
4.6 Specimen Supports: liquid line, or the vapor phase. In a stacked rack, the first and
4.6.1 The specimen-supporting device should not be af- last specimens should be dummy specimens so that the
fected by or cause contamination of the dip solution. See Note outermost exposure specimens are shielded by their neighbors
2. in the same manner as specimens in the middle of the stack.
4.6.2 The method of supporting specimens will vary with
5. Reagents and Materials
the apparatus used for conducting the tests, but should be
designed to insulate the specimens from each other physically 5.1 Purity of Reagents—Reagent grade chemicals shall be
andelectricallyandtoinsulatethespecimensfromanymetallic
used in all tests. Unless otherwise indicated, it is intended that
container or supporting device used within the apparatus. The all reagents shall conform to the specifications of the Commit-
specimens shall n
...

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1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.6 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.  
1.7 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.

  • Standard
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  • Standard
    4 pages
    English language
    sale 15% off