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ASTM Selected Technical Papers
Hydrogen Embrittlement: Prevention and Control
By
Louis Raymond
Louis Raymond
editor
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ISBN-10:
0-8031-0959-8
ISBN:
978-0-8031-0959-9
No. of Pages:
443
Publisher:
ASTM International
Publication date:
1988

In recent years, there has been a rising interest in diffusible hydrogen testing of steel weld metals. Several test methods have been used with varying degrees of success. The glycerin displacement method, which has been widely used, has been demonstrated to be inaccurate and under certain conditions totally unreliable. Alternative use of mercury as a collection medium provides for reliability in testing but introduces complications associated with the use of a hazardous material. Recently, gas chromatography has been used as a basis for diffusible hydrogen analysis. The method presented in this paper allows for degassing of a welded specimen in a closed chamber and subsequent analysis of the resulting gas mixture by gas chromatography. The method is flexible in that it allows for degassing at several temperatures and allows for analysis of the gas contained without consuming it entirely. The purpose of this paper is to outline the general method and provide experimental and analytical verification of its accuracy. It is discussed in comparison with other methods and equipment in current use, and some examples of its application are presented.

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, “
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,”
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American Society for Metals
,
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.
2.
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, “
Recommended Procedure for the Determination of Total Water Contents of Electrode Coatings by Combustion (Potential Hydrogen Contents)
,” Doc. IIS/IIW-314-68,
International Institute of Welding
.
3.
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, “
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,”
Metal Construction
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, No.
7
,
07
1982
.
4.
Hirai
,
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, and
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, “
Prediction of Diffusible Hydrogen Content in Deposited Metals with Basic Type Covered Electrodes
,” IIW Doc. 11-929-80,
International Institute of Welding
.
5.
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,
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, and
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, “
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6.
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.
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,” MIL-S-24403A, dated
12
12
1981
.
9.
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,
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, and
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, “
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,”
Welding Journal
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60
, No.
3
,
1981
, pp. 51s–56s.
10.
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and
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,”
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, No.
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,
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,”
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, “
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,”
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13.
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,”
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14.
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,”
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,
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15.
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,
Blekherova
, and
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, “
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,”
Svar. Proiz.
,
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, No.
11
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16.
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and
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, “
A Water Displacement Method for Measuring Diffusible Hydrogen in Welds
,”
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, No.
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,
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17.
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.
18.
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and
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, “
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,”
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, Vol.
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, No.
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,
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.
19.
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and
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, “
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,”
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,
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20.
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,
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,
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.
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,
National Research Council of U.S., National Academy of Sciences
,
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.
22.
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,” Standard AWS A4.3-86,
American Welding Society
,
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.
23.
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,
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,
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,
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,
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.
24.
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and
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,
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,
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,
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27.
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28.
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,
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,
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29.
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,
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,
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,
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.
30.
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and
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, “
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,”
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10A
,
01
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, pp. 67–70.
31.
Nelson
and
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, “
Gas Phase Hydrogen Permeation through Alpha Iron, 4130 Steel, and 304 Stainless Steel from Less than 100°C to near 600°C
,” NASA Technical Note, NASA TN D-7265,
NASA
,
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,
04
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.
32.
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, 49th Edition,
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,
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,
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.
33.
Dowdy
and
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,
Statistics for Research
,
John Wiley and Sons
,
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,
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.
34.
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and
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,
Hydrogen in Weld Metal—Reprints from Schweissmitteilungen
,
Welding Industries Oerlikon Buhrle Ltd.
,
Zurich, Switzerland
, pp. 4–14.
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