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ASTM B810-00

(Test Method)

Standard Test Method for Calibration of Atmospheric Corrosion Test Chambers by Change in Mass of Copper Coupons

Standard Test Method for Calibration of Atmospheric Corrosion Test Chambers by Change in Mass of Copper Coupons

SCOPE
1.1 This test method covers the calibration of atmospheric corrosion test chambers for electrical contacts that produce an adherent film of corrosion product on copper, such as a test comprised of a mixture of flowing gases that react with copper.
1.2 This test method is not applicable to tests where corrosion products may be removed from a copper surface during the test by fluids.
1.3 This test method is not applicable to tests where airborne solid or liquid material may be deposited on a copper surface during the test, as in a test which includes particulates suspended in the atmosphere.
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 establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.  
1.5 The values stated in SI units are to be regarded as the standard.

General Information

Status
Historical
Publication Date
09-Nov-2001
ICS
77.060 - Corrosion of metals
Technical Committee
B02 - Nonferrous Metals and Alloys
Drafting Committee
B02.11 - Electrical Contact Test Methods
Current Stage
Ref Project

Relations

Replaced By
ASTM B810-01 - Standard Test Method for Calibration of Atmospheric Corrosion Test Chambers by Change in Mass of Copper Coupons
Effective Date
10-Nov-2001
Referred By
ASTM B808-10(2020) - Standard Test Method for Monitoring of Atmospheric Corrosion Chambers by Quartz Crystal Microbalances
Effective Date
10-Nov-2001
Referred By
ASTM B825-19 - Standard Test Method for Coulometric Reduction of Surface Films on Metallic Test Samples
Effective Date
10-Nov-2001
Referred By
ASTM B827-05(2020) - Standard Practice for Conducting Mixed Flowing Gas (MFG) Environmental Tests
Effective Date
10-Nov-2001
Referred By
ASTM B845-97(2018) - Standard Guide for Mixed Flowing Gas (MFG) Tests for Electrical Contacts
Effective Date
10-Nov-2001
Referred By
ASTM B826-09(2020) - Standard Test Method for Monitoring Atmospheric Corrosion Tests by Electrical Resistance Probes
Effective Date
10-Nov-2001

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ASTM B810-00 - Standard Test Method for Calibration of Atmospheric Corrosion Test Chambers by Change in Mass of Copper CouponsASTM B810-00 - Standard Test Method for Calibration of Atmospheric Corrosion Test Chambers by Change in Mass of Copper Coupons
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ASTM B810-00 - Standard Test Method for Calibration of Atmospheric Corrosion Test Chambers by Change in Mass of Copper Coupons
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NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: B 810 – 00 An American National Standard
Standard Test Method for
Calibration of Atmospheric Corrosion Test Chambers by
Change in Mass of Copper Coupons
This standard is issued under the fixed designation B 810; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope in terms of their effect on copper; this test method provides a
way of comparing one test against a standard defined else-
1.1 This test method covers the calibration of atmospheric
where, or allows a comparison of the performance of a test
corrosion test chambers for electrical contacts that produce an
over a period of time. Although this test method provides for a
adherent film of corrosion product on copper, such as a test
relatively simple check of a test, the user is advised that
comprised of a mixture of flowing gases that react with copper.
additional analysis of the test chamber ambient is generally
1.2 This test method is not applicable to tests where
required to reproduce test conditions.
corrosion products may be removed from a copper surface
3.2 Atmospheric corrosion tests are used on a variety of
during the test by fluids.
materials besides copper. Care should be exercised in drawing
1.3 This test method is not applicable to tests where
conclusions about the effects on such materials of apparently
airborne solid or liquid material may be deposited on a copper
equivalent tests if the composition of gases or experimental
surface during the test, as in a test which includes particulates
conditions are different. The primary use of this calibration test
suspended in the atmosphere.
method is to assure correlation among nominally identical
1.4 This standard does not purport to address all of the
tests.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4. Apparatus
priate safety and health practices and determine the applica-
4.1 Racks or Fixtures suitable for holding the copper cou-
bility of regulatory limitations prior to use.
pons in the test chamber are required. Make these fixtures from
1.5 The values stated in SI units are to be regarded as the
a material that is not attacked by the corrosion test. The fixtures
standard.
shall be designed to:
2. Summary of Test Method 4.1.1 Hold the coupons in a vertical orientation,
4.1.2 Hold the coupons so that they do not show any
2.1 Copper coupon samples of a well-defined size are
perceptible motion when observed with the unaided eye during
prepared and each is labeled for identification. All such
the test,
coupons are cleaned by a standard process. Each coupon is
4.1.3 Cover less than 5 % of the entire coupon surface area,
weighed and the value is recorded. All coupons are exposed to
4.1.4 Touch the coupon only with electrically insulating
the corrosion test for a specified time. The coupons are
parts and,
removed from the test and weighed and the new values are
4.1.5 Allow free circulation of the ambient on both sides of
recorded. The change in weight for each coupon is calculated.
the coupon.
The coupons are subjected to additional analysis as appropriate
4.2 In general, design all parts of the fixture to permit
to determine the composition and thickness of any films
maximum circulation of the ambient around the coupon
present on the surface.
surfaces. The size and positioning of the holding fixtures
3. Significance and Use
depends on the chamber size. Section 6 of this test method
gives requirements on the number and spacing of coupons; the
3.1 Electrical devices that contain electrical contacts gener-
holding fixtures must be designed to comply with these
ally contain some copper-based materials. Atmospheric corro-
requirements.
sion of copper parts in such devices often occurs in service
4.3 Balance, with a capacity of at least 2 g and a resolution
environments. A quantitative measure of the effect of a
of 5 μg is required. Maintain the ambient in the vicinity of the
laboratory corrosion test on copper permits assessment of the
balance between 20 and 50 % relative humidity.
severity of the test. In addition, corrosion tests may be defined
4.4 Fume Hood, to conduct the chemical cleaning procedure
of the coupons is required.
This test method is under the jurisdiction of ASTM Committee B02 on
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
5. Reagents and Materials
B02.11 on Electrical Contact Test Methods.
Current edition approved May 10, 2000. Published June 2000. Originally
5.1 Purity of Reagents—Reagent grade chemicals shall be
published as B 810 – 91. Last previous edition B 810 – 96.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
B 810
used in all tests. Unless otherwise indicated, it is intended that resist bending during handling during the test but not so thick
all reagents conform to the specifications of the Committee on that the edges become a significant portion of the surface area.
Analytical Reagents of the American Chemical Society In general, thicknesses between 0.1 and 0.6 mm are recom-
where such specifications are available. Other grades may be mended. Obtain material with a surface roughness less than
used, provided it is first ascertained that the reagent is of 0.15 μm center line average and use the material with the
sufficiently high purity to permit its use without lessening the as-rolled surface finish. Make the coupons squares or rect-
accuracy of the determination. angles preferably 12.5 6 1.2 mm wide. One or two holes 2.5
mm or less in diameter may be added to aid in mounting.
6. Procedure
Inspect the edges of the coupons at 103 magnification for the
6.1 Use the requirements listed in 6.1.1 through 6.1.3 to presence of burrs or slivers. If such features are found, they
must be removed since they may corrode at a much higher rate
determine the number of copper coupon specimens to be
prepared. than the coupon surface.
6.1.1 For chambers with cubic working volumes, use the 6.4 Mark all coupons with a code giving each coupon a
length of an edge to determine the number and placement of unique identification. Make the characters in the code marking
coupons in accordance with the following rules. For chambers about 2 mm high by engraving or stamping without ink.
with an edge dimension of 0.9 m or less, construct a reference 6.5 During the cleaning procedure and at all times after
grid with three equally spaced lines in each direction with the cleaning, handle coupons only with clean tweezers grasping in
outer lines 0.1 m from the chamber wall and the third line the region around the identification marking. Place each copper
centered between the outer lines. Place a coupon at each coupon in a separate clean, dry glass vial of an appropriate size
such that only the edges and corners of the coupons touch the
intersection of grid lines (27 coupons required). For chambers
with an edge dimension of 0.9 m to 1.5 m, construct a reference glass surfaces.
6.6 Clean all coupons in accordance with the procedure
grid with four equally spaced lines in each direction. The outer
lines are placed 0.1 m from the chamber wall. Place a coupon given in 6.6.1 through 6.6.7. Where a liquid bath is required,
fill an appropriate vessel to a depth equal to or greater than 25
at each intersection of grid lines (64 coupons required). For
chambers with a maximum edge dimension greater than 1.5 m mm plus the largest dimension of the coupon sample to be
cleaned. Unless otherwise directed, change the fluid in all baths
but less than 2.0 m, construct a reference grid with five equally
spaced lines in each direction. The outer lines are placed 0.1 m after 50 coupons have been processed. Unless otherwise
directed, use all baths at room temperature.
from the chamber wall. Place a coupon at each intersection of
grid lines (125 coupons required).
NOTE 1—Precaution—Conduct all operations involving acids and
6.1.2 For rectangular chambers with non-cubic working
solvents in a fume hood.
volumes, the guidelines for each dimension of the chamber
NOTE 2—Precaution—Dispose of all acids and solvents in a safe,
along the x, y, and z axes of the chamber shall follow the
legally acceptable manner.
appropriate guidelines applied to cubic chambers. Thus, if the NOTE 3—The goal of 6.6.1 through 6.6.2 is to produce a coupon surface
reasonably free of oils, greases, particulate debris and similar contami-
x and z axes are 1.4 m and the y axis is 0.8 m, four grid lines
nants. Alternative test methods which achieve the same result are
would be used for the x and z axes and 3 grid lines would be
acceptable. Such alternative test methods may be necessary or desirable
used for the y axis when determining the grid for coupon
depending upon local conditions or facilities.
location.
6.6.1 Immerse a coupon or small group of coupons for 5 to
6.1.3 For chambers with working volumes of other shapes
10 minutes in an ultrasonic cleaner containing hot (65–85°C)
than those covered in the preceding sections, devise a logical
2% aqueous solution of a mildly alkaline (pH7.5–10) de
...

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1.1 This practice covers the apparatus and procedure to be used in conducting qualitative assessment tests in accordance with the requirements of material or product specifications by means of specimen exposure to condensed moisture containing sulfur dioxide.  
1.2 The exposure conditions may be varied to suit particular requirements and this practice includes provisions for use of different concentrations of sulfur dioxide and for tests either running continuously or in cycles of alternate exposure to the sulfur dioxide containing atmosphere and to the ambient atmosphere.  
1.3 The variant of the test to be used, the exposure period required, the type of test specimen, and the criteria of failure are not prescribed by this practice. Such details are provided in appropriate material and product purchase specifications.  
1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.  
1.5 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.  For a specific warning statement, see 4.3.  
1.6 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.

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ASTM
ASTM G35-23(Practice)
Standard Practice for Determining the Susceptibility of Stainless Steels and Related Nickel-Chromium-Iron Alloys to Stress-Corrosion Cracking in Polythionic Acids

SIGNIFICANCE AND USE
4.1 Polythionic acids are chemically described as H2SxO6, where x is usually 3, 4, or 5 (1)3 though can be more than 50 (2). These acid environments provide a way of evaluating the resistance of stainless steels and related alloys to intergranular stress corrosion cracking. Failure is accelerated by the presence of increasing amounts of intergranular precipitate. Results for the polythionic acid test have not been correlated exactly with those of intergranular corrosion tests (Test Methods G28). Also, this test may not be relevant to stress corrosion cracking in chlorides or caustic environments.  
4.2 The polythionic acid environment may produce areas of shallow intergranular attack in addition to the more localized and deeper cracking mode of attack. Examination of failed specimens is necessary to confirm that failure occurred by cracking rather than mechanical failure of reduced sections.
SCOPE
1.1 This practice covers procedures for preparing and conducting the polythionic acid test at room temperature, 22 °C to 25 °C (72 °F to 77 °F), to determine the relative susceptibility of stainless steels or other related materials (nickel-chromium-iron alloys) to intergranular stress corrosion cracking.  
1.2 This practice can be used to evaluate stainless steels or other materials in the “as received” condition or after being subjected to high-temperature service, 482 °C to 815 °C (900 °F to 1500 °F), for prolonged periods of time.  
1.3 This practice can be applied to wrought products, castings, and weld metal of stainless steels or other related materials to be used in environments containing sulfur or sulfides. Other materials capable of being sensitized can also be tested in accordance with this test.  
1.4 This practice may be used with a variety of stress corrosion test specimens, surface finishes, and methods of applying stress.  
1.5 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered 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. For more specific precautionary statements, see Section 7.  
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.

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  • Standard
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    English language
    sale 15% off