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HYDROGEN SENSOR WITH PALLADIUM ALLOY FILM FOR MONITORING THE RATE OF HYDROGEN PERMEATION IN H2S CORROSION |
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湖南大学化学化工学院 |
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Abstract A sealed Devanathan-Stachurski cell as hydrogen sensor has been developed for monitoring atomic hydrogen permeation rate.Pd75Ag25 alloy is used as susceptive component and counter electrode.A piece of pure nickel is used as reference electrode.0.2 mol/dm3 KOH is filled in the cell.The background current change and signal response time were detected.The sensitivity and recurrence of the developed sensor were researched.The output of current signal from the sensor was analyzed by comparing to output of current signal from an original Devanathan-Stachurski cell.The effect of temperature impact on the senor
signal was tested.The developed sensor was applied to measure the hydrogen permeation rate in field.The field result is reasonable.The working temperature of the sensor is ranged from 5℃ to 50 ℃.It is used to monitor the permeation rate of atomic hydrogen in steel wall of the equipment owing to H2S corrosion.
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Received: 26 March 2004
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