On the Methodology of Thermal Desorption Spectroscopy to Evaluate Hydrogen Embrittlement


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Thermal desorption spectroscopy (TDS) is a very important tool in hydrogen embrittlement (HE) related research and has been applied on many different materials over the last decades in order to improve knowledge on the HE phenomenon. TDS provides the opportunity to distinguish between different types of hydrogen traps based on the analysis of a spectrum with different peak temperatures each corresponding to hydrogen desorption from a specific trap. These peak temperatures, and consequently the different traps in a material, arise from the various microstructural characteristics of the material. However, TDS results are also influenced by many other parameters, such as the sample surface preparation, the electrolytes used for hydrogen charging, sample geometry, charging time, current density, charging temperature. Even though the use of thermal desorption to evaluate hydrogen-metal interactions has increased over the past years, a careful evaluation of the effect of these other parameters was not yet performed. In this work, the impact of some of the above mentioned parameters was studied. It was demonstrated that the sample geometry, the surface roughness, and the initial total pressure of the TDS chamber influenced significantly the obtained TDS spectrum.



Materials Science Forum (Volumes 706-709)

Main Theme:

Edited by:

T. Chandra, M. Ionescu and D. Mantovani




D. Pérez Escobar et al., "On the Methodology of Thermal Desorption Spectroscopy to Evaluate Hydrogen Embrittlement", Materials Science Forum, Vols. 706-709, pp. 2354-2359, 2012

Online since:

January 2012




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