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Measurements of electrochemical noise on the passive layer of differently heat treated stainless steels

✍ Scribed by M. Slemnik; A. Petek; Prof. Dr. V. Doleček

Publisher
John Wiley and Sons
Year
1995
Tongue
German
Weight
417 KB
Volume
46
Category
Article
ISSN
0947-5117

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✦ Synopsis

Abstract

The passivation current fluctuations have been studied for differently heat treated steels X 20 Cr 13, after 20 h of passivation in 0.2 M H~2~SO~4~ at constant potentials + 0.20 V, + 0.40 V and + 0.60 V vs. SCE, respectively. Signals of the alternating passivation current have been monitored on the oscilloscope and transformed into a frequency domain by FFT. PSD (Power Spectral Density) values were calculated and represented in the dependence of frequency. These curves (PSD vs. frequency) change with heat treatment, passivation potential and the quality of the passive layers on the steel: ace. to stability and ability of self‐repairing.

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