2.1.2 Electrochemical Hydrogen Sensor for Aluminium Melts
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
- 2.1 High Temperature Gas Sensors II
- C. Schwandt - Department of Materials Science and Metallurgy, University of Cambridge (UK)
- 156 - 158
The presence of dissolved hydrogen in molten aluminium and its alloys has a critical impact on the quality of cast aluminium components. The quantitative analysis of hydrogen in these melts is therefore of major importance in the aluminium industry. Research work conducted at the University of Cambridge and subsequent development work performed in conjunction with an industrial partner, have resulted in a novel, and now commercialised, electrochemical hydrogen sensor for aluminium melts. The sensor operates in the potentiostatic mode and relies on a proton-conducting solid electrolyte and a solid reference electrode. This contribution summarises the main steps of the underlying research and development programme, covering the actual gas sensor, test measurements in gas phases, the probe for molten metal application, and test measurements in aluminium melts.