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ASTM D 7542 : 2015

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by
superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Standard Test Method for Air Oxidation of Carbon and Graphite in the Kinetic Regime
Available format(s)

Hardcopy , PDF

Superseded date

22-11-2021

Language(s)

English

Published date

16-11-2015

1.1This test method recommends a standard procedure for measuring oxidation rates in air of various grades of nuclear graphite and/or manufactured carbon. Following the standard procedure recommended here, one can obtain kinetic parameters that characterize the oxidation resistance of tested materials and that can be used to for materials selection and qualification, and for quality control purposes in the fabrication process.

1.2This test method covers the rate of oxidative weight loss per exposed nominal geometric surface area, or per initial weight of machined test specimens of standard size and shape, or both. The test is valid in the temperature range where the rate of air oxidation of graphite and manufactured carbon is limited by reaction kinetics.

1.3This test method also provides a standard oxidation temperature (as defined in 3.1.7), and the kinetic parameters of the oxidation reaction, namely the activation energy and the logarithm of pre-exponential factor in Arrhenius equation. The kinetic parameters of Arrhenius equation are calculated from the temperature dependence of oxidation rates measured over the temperature range where Arrhenius plots (as defined in 3.1.8) are linear, which is defined as the “kinetic” or “chemical control” oxidation regime. For typical nuclear grade graphite materials it was found that the practical range of testing temperatures is from about 500 °C to 550 °C up to about 700 °C to 750 °C.

1.4The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.5This 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.

Committee
D 02
DocumentType
Test Method
Pages
12
PublisherName
American Society for Testing and Materials
Status
Superseded
SupersededBy
Supersedes

ASTM C 781 : 2020 Standard Practice for Testing Graphite Materials for Gas-Cooled Nuclear Reactor Components
ASTM D 8289 : 2020 Standard Test Method for Tensile Strength Estimate by Disc Compression of Manufactured Graphite
ASTM C 1783 : 2015 Standard Guide for Development of Specifications for Fiber Reinforced Carbon-Carbon Composite Structures for Nuclear Applications
ASTM C 781 : 2018 Standard Practice for Testing Graphite Materials for Gas-Cooled Nuclear Reactor Components
ASTM C 1793 : 2015 Standard Guide for Development of Specifications for Fiber Reinforced Silicon Carbide-Silicon Carbide Composite Structures for Nuclear Applications

ASTM E 1582 : 2021 Standard Test Method for Temperature Calibration of Thermogravimetric Analyzers
ASTM E 1582 : 2017 Standard Test Method for Temperature Calibration of Thermogravimetric Analyzers
ASTM E 1970 : 2011 Standard Practice for Statistical Treatment of Thermoanalytical Data
ASTM E 1970 : 2000 Standard Practice for Statistical Treatment of Thermoanalytical Data
ASTM E 1582 : 2014 Standard Practice for Calibration of Temperature Scale for Thermogravimetry
ASTM E 691 : 2020 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ASTM E 691 : 2019 : EDT 1 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ASTM E 691 : 2009 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ASTM E 1582 : 2000 Standard Practice for Calibration of Temperature Scale for Thermogravimetry
ASTM E 1582 : 2004 Standard Practice for Calibration of Temperature Scale for Thermogravimetry
ASTM E 1582 : 2010 Standard Practice for Calibration of Temperature Scale for Thermogravimetry
ASTM E 1970 : 2016 Standard Practice for Statistical Treatment of Thermoanalytical Data
ASTM E 1582 : 1993 Standard Practice for Calibration of Temperature Scale for Thermogravimetry
ASTM E 1970 : 2006 Standard Practice for Statistical Treatment of Thermoanalytical Data
ASTM E 1970 : 2001 Standard Practice for Statistical Treatment of Thermoanalytical Data
ASTM E 1970 : 2016 : R2021 Standard Practice for Statistical Treatment of Thermoanalytical Data

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