Abstract
A device has been developed for the accurate weighing of 20 specimens, using a single electronic microbalance. The balance output is interfaced to a data logger and a computer is used to process the results. The operation of the equipment and the computing is described. The results of several long duration experiments on mild steels in CO2-based gas at temperatures up to 770 K and pressures up to 2.8 MNm−2 are discussed particularly in terms of accuracy and reproducibility and the effects of temperature and hydrogen on the post breakaway rate. For an inert Ni specimen at 770 K and 2.8 MNm−2 the standard deviation of the weight determined over 200 and 800 h. at 1.5 h. intervals was found to be 43 and ∿ 60 μg respectively. For mild steel samples an oxidation rate of 5 μg cm−2h−1 could be determined to ± 5% at the 95% confidence level in an experiment of 200 h. duration. The oxidation rate of a mild steel in these tests was unaffected by graphite paint or by contact with Ni and it compared closely with results obtained by intermittent weighing methods.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
J.M. Ferguson, P. Livesey and D. Mortimer, Proc. 9th Int. Conf. Vacuum Microbalance Techniques, Berlin 1970 (to be published by Plenum Press, N.Y.)
W.B.A. Sharp and D. Mortimer, ibid.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1972 Springer Basel AG
About this chapter
Cite this chapter
Ferguson, J.M., Fuller, R.J., Mortimer, D. (1972). Operating Experience with a Multi-Specimen ‘Carousel’ Weighing Device. In: Wiedemann, H.G. (eds) Advances in Instrumentation. Birkhäuser, Basel. https://doi.org/10.1007/978-3-0348-7413-7_17
Download citation
DOI: https://doi.org/10.1007/978-3-0348-7413-7_17
Publisher Name: Birkhäuser, Basel
Print ISBN: 978-3-0348-7415-1
Online ISBN: 978-3-0348-7413-7
eBook Packages: Springer Book Archive