Influence of experimental parameters on thermal desorption spectroscopy measurements during evaluation of hydrogen trapping

Thermal desorption spectroscopy (TDS) was performed on two steels, (i) S550MC (an industrial, micro-alloyed high strength low alloy steel), and (ii) C075, a lab cast TiC containing steel. The influence of experimental parameters was studied which were related to hydrogen charging, sample features and the TDS measurement itself. It was found that the experimental conditions can significantly influence the TDS results. The results indicated that all experimental parameters are important in hydrogen related research and a reproducible experimental procedure is important in order to guarantee a reproducible analysis of the hydrogen trapping behavior by means of thermal desorption spectroscopy.