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ASTM-G148:2003 Edition

ASTM-G148:2003 Edition

$40.63

G148-97(2003) Standard Practice for Evaluation of Hydrogen Uptake, Permeation, and Transport in Metals by an Electrochemical Technique

Published By Publication Date Number of Pages
ASTM 2003 10
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1.1 This practice gives a procedure for the evaluation of hydrogen uptake, permeation, and transport in metals using an electrochemical technique which was developed by Devanathan and Stachurski. While this practice is primarily intended for laboratory use, such measurements have been conducted in field or plant applications. Therefore, with proper adaptations, this practice can also be applied to such situations.

1.2 This practice describes calculation of an effective diffusivity of hydrogen atoms in a metal and for distinguishing reversible and irreversible trapping.

1.3 This practice specifies the method for evaluating hydrogen uptake in metals based on the steady-state hydrogen flux.

1.4 This practice gives guidance on preparation of specimens, control and monitoring of the environmental variables, test procedures, and possible analyses of results.

1.5 This practice can be applied in principle to all metals and alloys which have a high solubility for hydrogen, and for which the hydrogen permeation is measurable. This method can be used to rank the relative aggressivity of different environments in terms of the hydrogen uptake of the exposed metal.

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.

PDF Catalog

PDF Pages PDF Title
1 Scope
Referenced Documents
Terminology
2 Summary of Practice
3 Significance and Use
Apparatus
FIG. 1
4 Specimen
Test Environment
5 Test Procedure
FIG. 2
6 Environmental Control and Monitoring
7 Procedures For Analysis of Results
8 Reporting
FIG. 3
9 Keywords
X1. SUGGESTED TEST CONDITIONS FOR SPECIFIC ALLOY TYPES
X1.1
X1.2 Stainless Steels
X1.3 Nickel Alloys
X1.4 Carbon, Carbon-manganese and Other Low Alloy Steels

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