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98397 INTERPRETATION OF HYDROGEN PERMEATION TRANSIENTS OBTAINED BY THE VACUUM LOSS TECHNIQUE

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Product Number: 51300-98397-SG
ISBN: 98397 1998 CP
Author: J.R. Vera, 0. Yepez, R.Callarotti
Industry: Oil and Gas Production
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In a previous work, a relationship was established between a vacuum loss method and a conventional electrochemical technique for measuring hydrogen permeation through metals. In this paper, mathematical expressions are derived and used in order to quantitatively compare electrochemical transients typically obtained in the laboratory, with the vacuum loss data that could be obtained in the field. The effects of capillary tubing length, temperature and metal wall thickness on both the time and magnitude response are assessed. These expressions will allow to use the vacuum loss hydrogen patch probe as an on-line sulfide stress cracking or hydrogen induced cracking susceptibility monitor, based on correlation found in the laboratory using electrochemical techniques. Keywords: Corrosion, hydrogen permeation, sensor, circuital modeling discretization, vacuum hydrogen probe.
In a previous work, a relationship was established between a vacuum loss method and a conventional electrochemical technique for measuring hydrogen permeation through metals. In this paper, mathematical expressions are derived and used in order to quantitatively compare electrochemical transients typically obtained in the laboratory, with the vacuum loss data that could be obtained in the field. The effects of capillary tubing length, temperature and metal wall thickness on both the time and magnitude response are assessed. These expressions will allow to use the vacuum loss hydrogen patch probe as an on-line sulfide stress cracking or hydrogen induced cracking susceptibility monitor, based on correlation found in the laboratory using electrochemical techniques. Keywords: Corrosion, hydrogen permeation, sensor, circuital modeling discretization, vacuum hydrogen probe.
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