PSI - Issue 13

A.M. Polyanskiy et al. / Procedia Structural Integrity 13 (2018) 1408–1413 Author name / Structural Integrity Procedia 00 (2018) 000–000

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It is shown that the principle of hydrogen detection, based on its high thermal conductivity in the gas phase, does not allow to avoid the influence of many environmental factors, sample composition, the crucibles state and conditions of measurement on its result. It is shown that this influence can be decisive and significantly change the measured value of hydrogen concentration, especially when hydrogen concentration is less than 1 ppm. Thus, the conclusion of the fundamental report of the European program Hassel et al. (2013) that there are no reliable standard samples with a certified hydrogen content less than 1 ppm must be supplemented with the conclu sion that the “atmospheric” hydrogen analyzers are not suitable for measurements in metal samples with a hydrogen concentration less than 1 ppm.

Acknowledgements

This research was supported by Siemens AG

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