An electrochemical sodium sensor for aluminium melts

The modification of aluminium-silicon alloys by sodium addition before casting results in an improvement of the mechanical properties of the alloy. As sodium has a high reactivity with air, it forms sodium oxide or sodium hydroxide vapours and the total amount of sodium in the alloy decreases as a f...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 1995-03, Vol.24 (1), p.273-275
Main Authors: Dekeyser, J.C., De Schutter, F., Van der Poorten, C., Zhang, L., Fray, D.J.
Format: Article
Language:English
Subjects:
Aluminium melts
Analytical chemistry
Applied sciences
Chemistry
Electrochemical sensor
Exact sciences and technology
General, instrumentation
Metals. Metallurgy
Sodium sensor
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Summary:The modification of aluminium-silicon alloys by sodium addition before casting results in an improvement of the mechanical properties of the alloy. As sodium has a high reactivity with air, it forms sodium oxide or sodium hydroxide vapours and the total amount of sodium in the alloy decreases as a function of time. This paper describes the development of test results of an electrochemical sodium sensor for the determination of sodium in an aluminum-silicon alloy. The described experiments show the promising features of such a sensor in the aluminum casting industry, where the sodium level must be held between 50 and 200 ppm for modification of the alloy.
ISSN:0925-4005
1873-3077
DOI:10.1016/0925-4005(95)85058-9