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Active and Passive Electronic Components
Volume 2011 (2011), Article ID 108423, 9 pages
http://dx.doi.org/10.1155/2011/108423
Research Article

Testing the Effects of Seacoast Atmosphere on Tantalum Capacitors

1Department of Electronics, Tampere University of Technology, P.O. Box 692, 33101 Tampere, Finland
2Department of Mathematics, Tampere University of Technology, P.O. Box 553, 33101 Tampere, Finland

Received 14 January 2011; Accepted 23 March 2011

Academic Editor: Jiun Wei Horng

Copyright © 2011 Johanna Virkki and Pasi Raumonen. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The goal of this research was to test the effects of seacoast atmosphere on tantalum capacitors. Four tests were chosen for this purpose: the 85/85 test was chosen for testing the effects of the combination of high humidity and high temperature, salt spray testing was done for examining the effects of high humidity and salt, temperature cycling test was applied for testing the effects of temperature changes, and a 100% RH humidity test was developed for examining the effects of very high humidity. The results show that combination of high humidity and high temperature did not possess a significant risk for these capacitors during their normal use. Very high humidity and radical temperature changes both affected the breakdown voltages of tantalum capacitors. Salt fog caused corrosion of these components and had a small effect on breakdown voltage but did not have an effect on capacitance or ESR.