Tuesday, 11 February 2025

Time:
10:30 - 11:30 AM
Place: This Tutorial is a hybrid event. You can join the event on-site and online.
Rhein-Sieg-Forum, Bachstraße 1, 53721 Siegburg
Moderator:
Dr.-Ing. Jens Jürgensen

When investigating the effects of hydrogen on metals, hydrogen analyses are of high importance. Within this field there are many different methods available. The most widely used techniques trigger hydrogen effusion by elevated temperature during the analyses. Hydrogen is subsequently quantitively analyzed within conductivity cells or by mass spectrometry. When performing these kinds of analyses, it is of highest importance to apply the correct temperature and heating rate. For example, when embrittling effects caused by diffusive hydrogen are of interest, thermal analyses must not exceed 300 °C. Otherwise, trapped hydrogen would be activated as well, resulting in a wrong reading and interpretation. Equally of importance are handling, cleaning and storage steps of the samples prior to the analyses.

This workshop presents an overview of all common and some specific hydrogen analyses methods. While emphasis will be placed on thermal hydrogen analyses such as TDMS (Thermal Desorption Mass Spectrometry), CGHA (Carriere Gas Hot Extraction) or HCA (Hydrogen Collecting Analysis), other methods such as electrochemical analysis by LHA (Local Hydrogen Analysis) or magnetic Barkhausen Noise Analysis (BNA) will also be introduced.

The workshop aims on proving an understanding of how to choose the best suiting analysis method for a specific application and details which parameters are required and how samples should be handled in order to generate highly accurate readings. In addition, we will discuss how trapped hydrogen is analyzed with accompanying calculations of trapping energy.