DEVELOPMENT OF A REFERENCE MATERIAL FOR HYDROGEN CONTENTS MEASUREMENT |
|---|
| A. Yun-Hee Lee, B. Yongil Kim, C. Jongseo Park, D. Unbong Baek, E. Kwon Sang Ryu |
- Abstract:
- By heating a metal sample exposed to hydrogen environment until its melting point, whole hydrogen can be released and its content is quantitatively measured with a thermal conductivity detector (TCD). Reference materials with already-known hydrogen contents are needed to calibrate the detector. In this study, we proposed a new concept for making the reference material; the targeted hydrogen content can be obtained by controlling mixing amount of a hydride with its balancing weight. The hydrogen contents can be roughly calculated by considering the chemical stoichiometry of the hydride. A linear proportional relationship was identified between the calculated hydrogen contents and the empirically measured values from the detector. However, both hydrogen contents did not coincide with each other numerically. This phenomenon was discussed from several factors such as partial hydrogenation and air-bone contaminants in the hydride, inconsistent calibration procedure, impurity involved in the measurement, etc.
- Keywords:
- reference material, gravimetric hydrogen contents, thermal hydrogen release, metal hydride, hydrogen-assisted damage
- Download:
- IMEKO-WC-2012-TC20-O9.pdf
- DOI:
- -
- Event details
- Event name:
- XX IMEKO World Congress
- Title:
Metrology for Green Growth
- Place:
- Busan, REPUBLIC of KOREA
- Time:
- 09 September 2012 - 12 September 2012