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ASTM B808-97(2003)

(Test Method)

Standard Test Method for Monitoring of Atmospheric Corrosion Chambers by Quartz Crystal Microbalances

Standard Test Method for Monitoring of Atmospheric Corrosion Chambers by Quartz Crystal Microbalances

SCOPE
1.1 This test method monitors the reactivity of a gaseous test environment in which metal surfaces (that is, electrical contacts) and other materials subject to pollutant gas attack, undergo accelerated atmospheric corrosion testing. This test method is applicable to adherent corrosion films whose total corrosion film thickness ranges from a few atomic monolayers to approximately a micrometer.
1.2 The test method provides a dynamic, continuous, in situ, procedure for monitoring the corrosion rate in corrosion chambers; the uniformity of corrosion chambers; and the corrosion rate on different surfaces. Response time of the order of seconds is possible.
1.3 With the proper samples, the quartz crystal microbalance (QCM) test method can also be used to monitor the weight loss from a surface due to the desorption of surface species (that is, reduction of an oxide in a reducing atmosphere). (Alternative names for QCM are quartz crystal oscillator, piezoelectric crystal oscillator, or thin film evaporation monitor.)
1.4 This test method is not sufficient to specify the corrosion process which may be occurring in a chamber, since a variety of pollutant gases and environments may cause similar weight gains.
1.5 This test method is generally not applicable to test environments where solid or liquid particles are deposited on the surface of the quartz crystal.
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 and health practices and determine the applicability of regulatory limitations prior to use.  
1.7 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only.

General Information

Status
Historical
Publication Date
31-Oct-2003
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

Replaces
ASTM B808-97 - Standard Test Method for Monitoring of Atmospheric Corrosion Chambers by Quartz Crystal Microbalances
Effective Date
01-Nov-2003
Replaced By
ASTM B808-05 - Standard Test Method for Monitoring of Atmospheric Corrosion Chambers by Quartz Crystal Microbalances
Effective Date
01-May-2005
Referred By
ASTM B827-05(2020) - Standard Practice for Conducting Mixed Flowing Gas (MFG) Environmental Tests
Effective Date
01-Nov-2003
Referred By
ASTM B826-09(2020) - Standard Test Method for Monitoring Atmospheric Corrosion Tests by Electrical Resistance Probes
Effective Date
01-Nov-2003
Referred By
ASTM B845-97(2018) - Standard Guide for Mixed Flowing Gas (MFG) Tests for Electrical Contacts
Effective Date
01-Nov-2003
Referred By
ASTM B825-19 - Standard Test Method for Coulometric Reduction of Surface Films on Metallic Test Samples
Effective Date
01-Nov-2003

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ASTM B808-97(2003) - Standard Test Method for Monitoring of Atmospheric Corrosion Chambers by Quartz Crystal MicrobalancesASTM B808-97(2003) - Standard Test Method for Monitoring of Atmospheric Corrosion Chambers by Quartz Crystal Microbalances
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ASTM B808-97(2003) - Standard Test Method for Monitoring of Atmospheric Corrosion Chambers by Quartz Crystal Microbalances
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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:B808–97(Reapproved2003)
Standard Test Method for
Monitoring of Atmospheric Corrosion Chambers by Quartz
1
Crystal Microbalances
This standard is issued under the fixed designation B 808; 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 1.7 The values stated in SI units are to be regarded as the
standard. The values in parentheses are for information only.
1.1 This test method monitors the reactivity of a gaseous
test environment in which metal surfaces (for example, elec-
2. Referenced Documents
trical contacts, assembled printed wiring boards, and so forth)
2
2.1 ASTM Standards:
and other materials subject to pollutant gas attack undergo
B 810 Test Method for Calibration of Atmospheric Corro-
accelerated atmospheric corrosion testing. This test method is
sion Test Chambers by Change in Mass of Copper Cou-
applicable to adherent corrosion films whose total corrosion
pons
film thickness ranges from a few atomic monolayers to
approximately a micrometre.
3. Summary of Test Method
1.2 The test method provides a dynamic, continuous, in-
3.1 A single crystal of quartz has various natural resonant
situ, procedure for monitoring the corrosion rate in corrosion
frequencies depending on the crystal’s size and shape. The
chambers; the uniformity of corrosion chambers; and the
decrease in natural frequency is linearly proportional to the
corrosion rate on different surfaces. Response time in the order
crystal mass and the mass of well-bonded surface films. For
of seconds is possible.
crystals with reactive metal films on the surface (usually
1.3 With the proper samples, the quartz crystal microbal-
driving electrodes), the mass of the crystal/metal film increases
ance (QCM) test method can also be used to monitor the
as the metal oxidizes or forms other compounds with gases
weight loss from a surface as a result of the desorption of
3,4
adsorbed from the atmosphere. Thus, by measuring the rate
surface species (that is, reduction of an oxide in a reducing
of resonant frequency change, a rate of corrosion is measured.
atmosphere). (Alternative names for QCM are quartz crystal
Non-adherent corrosion films, particles, and droplets yield
oscillator, piezoelectric crystal oscillator, or thin-film evapora-
ambiguousresults.Areviewoftheoryandapplicationsisgiven
tion monitor.)
5
in Lu and Czanderna.
1.4 Thistestmethodisnotsufficienttospecifythecorrosion
3.2 The chamber environmental uniformity and corrosion
process that may be occurring in a chamber, since a variety of
rate can be measured by placing matching quartz crystals with
pollutant gases and environments may cause similar weight
matching reactive metal films at various locations in the
gains.
chamber. If the chamber and corrosion rate have been stan-
1.5 This test method is generally not applicable to test
dardized, the corrosion rate on various surface materials that
environmentsinwhichsolidorliquidparticlesaredepositedon
have been deposited on the quartz crystal can be determined.
the surface of the quartz crystal.
1.6 This standard does not purport to address all of the
4. Significance and Use
safety concerns, if any, associated with its use. It is the
4.1 Corrosion film growth with thicknesses varying from a
responsibility of the user of this standard to become familiar
monolayer of atoms up to 1 µm can readily be measured on a
with all hazards including those identified in the appropriate
continuous, real-time, in-situ, basis with QCMs.
Material Safety Data Sheet for this product/material as pro-
vided by the manufacturer, to establish appropriate safety and
health practices, and determine the applicability of regulatory
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
limitations prior to use.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
1 3
This test method is under the jurisdiction of ASTM Committee B02 on King, W. H. Jr., Analytical Chemistry, Vol 36, 1964, p. 173.
4
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee Karmarkar, K. H. and Guilbaut, G. G. Analytical Chemistry Acta,Vol 75, 1975,
B02.11 on Electrical Contact Test Methods. p. 111.
5
Current edition approved Nov. 1, 2003. Published November 2003. Originally Lu, C. and Czanderna,A.W. Eds., Applications of Piezoelectric Quartz Crystal
approved in 1997. Last previous edition approved in 1997 as B 808 – 97. Microbalances, Elsevier, c1984.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West
...

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4.1 Electrical devices that contain electrical contacts generally contain some copper-based materials. Atmospheric corrosion of copper parts in such devices often occurs in service environments. A quantitative measure of the effect of a laboratory corrosion test on copper permits assessment of the severity of the test. In addition, corrosion tests may be defined in terms of their effect on copper; this test method provides a way of comparing one test against a standard defined elsewhere, or allows a comparison of the performance of a test over a period of time. Although this test method provides for a relatively simple check of a test, the user is advised that additional analysis of the test chamber ambient is generally required to reproduce test conditions.  
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4.1 Corrosion film growth with thicknesses varying from a monolayer of atoms up to 1 μm can readily be measured on a continuous, real-time, in-situ, basis with QCMs.  
4.2 The test results obtained for this test method are influenced by various factors, including geometrical effects, temperature, humidity, film thickness, film materials, electrode conditions, gases in the corrosion chamber, atmospheric pressure, and so forth. Calibration of coated crystals and instrumentation and reproducible crystal operating conditions are necessary for consistent results.
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1.1 This test method monitors the reactivity of a gaseous test environment in which metal surfaces (for example, electrical contacts, assembled printed wiring boards, and so forth) and other materials subject to pollutant gas attack undergo accelerated atmospheric corrosion testing. This test method is applicable to the growth of adherent corrosion films whose total corrosion film thickness ranges from a few atomic monolayers to approximately a micrometre.  
1.2 The test method provides a dynamic, continuous, in-situ, procedure for monitoring the corrosion rate in corrosion chambers; the uniformity of corrosion chambers; and the corrosion rate on different surfaces. Response time in the order of seconds is possible.  
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4.1 Corrosivity monitoring of test environments provides a means to monitor an integrated value of test corrosivity which cannot be evaluated from test parameters themselves, such as temperature, humidity, and gas concentration. As such the monitor value can be used for specification purposes such as test validation. Electrical resistance monitoring of conductors exposed to corrosive media is a well-established practice.3,4,5,6  
4.2 The resistance method assumes uniform corrosion over the entire surface of the exposed metal conductor segment. Local corrosion such as pitting, crevice, or grain boundary corrosion may provide invalid estimates of test corrosivity. Marked changes in slope of the curve of electrical resistance ratio versus time may indicate undesired processes which can be due to deficiencies in the test atmosphere or in the monitor itself.  
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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.  
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5.1 This test method is designed to rank material couples, surface treatments, and lubricants by CFT and in their resistance to adhesive wear. Since adhesive wear is a complex phenomenon and stochastic in nature, it is essential to evaluate surfaces to confirm the presence of adhesion.  
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5.3 The TCT is often used to evaluate the ability of material couples, surface treatments, coatings, and lubricants to prevent or reduce adhesive wear in metalworking operations including deep drawing, extrusion, and pipe bending. Other applications in which the test may be effective are loader bucket bushings, gear teeth at startup, and low-clearance pumps.  
5.4 This test method is best used as a comparative screening tool. The ranking of performance produced by the TCT correlates well with the ranking in many applications.3 However, since the test is a bench test and not directly reproducing any specific application, TCT results should be only used as an indicator of the tendency for adhesive wear to occur. TCT is a useful screening test for comparing the effectiveness of material couples, surface treatments, coatings, and lubricant formulations before process testing and field trials.
SCOPE
1.1 This test method covers laboratory procedures for determining the coefficient of friction (COF) and resistance of materials to adhesion under flat sliding using the twist compression test (TCT). This test method ranks material couples, surface treatments, coatings, and lubricant combinations by COF and their resistance to adhesion.  
1.2 The time until adhesion for the materials under the test conditions are reported and used to quantify the tribocouple’s adhesion resistance and susceptibility to galling or scuffing. Systems of higher adhesion resistance will give longer time until failure.  
1.3 The coefficient of friction values averaged between the test reaching full test pressure and the time of the onset of adhesion or the end of tests run for a predetermined time period are recorded. Systems are ranked by their average coefficients of friction before adhesion occurs.  
1.4 Units—The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard except psi and pounds in Table 1.  
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.  
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3.1 Moist air containing sulfur dioxide quickly produces easily visible corrosion on many metals in a form resembling that occurring in industrial environments. It is therefore a test medium well suited to detect pores or other sources of weakness in protective coatings and deficiencies in corrosion resistance associated with unsuitable alloy composition or treatments.  
3.2 The results obtained in the test should not be regarded as a general guide to the corrosion resistance of the tested materials in all environments where these materials may be used. Performance of different materials in the test should only be taken as a general guide to the relative corrosion resistance of these materials in moist SO2 service.
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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.  
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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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Standard Test Method for Corrosion Testing of Decorative Electrodeposited Coatings by the Corrodkote Procedure

SIGNIFICANCE AND USE
4.1 Nickel/chromium and copper/nickel/chromium electrodeposited coatings are widely used for decorative and protective applications. The Corrodkote test provides a method of controlling the quality of electroplated articles and is suitable for manufacturing control, as well as research and development.
SCOPE
1.1 This test method covers the Corrodkote2 method of evaluating the corrosion performance of copper/nickel/chromium and nickel/chromium coatings electrodeposited on steel, zinc alloys, aluminum alloys, plastics and other substrates.  
Note 1: The following ASTM standards are not requirements. They are reference for information only: Practice B537, Specification B456, Test Method B602, and Specification B604.  
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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.

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