Galvanostatic polarization has been performed on passive iron and nickel in the range of constant current density. Two techniques have been employed (i) successive polarization measurements are made without interruption, (ii) the stationary state is established between each two galvanostatic reading
Measurement of time resolved photocurrents and photopotentials on passive layers of iron and titanium
β Scribed by H. J. Rieger; Prof. Dr. W. J. Plieth
- Publisher
- John Wiley and Sons
- Year
- 1988
- Tongue
- German
- Weight
- 628 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0947-5117
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β¦ Synopsis
The time dependence of photopotential and photocurrent decay occurring after the incidence of a laser pulse was measured at iron and titanium passive layers. The photopotential decay showed a second order reaction kinetic. The photopotential decay on titanium was found to be much slower than on iron. At the iron electrode the dependence of the photopotential transients on pH-value, potential and light intensity was examined. The photocurrent transients were mainly determined by the electronic RC-time constant of the cell and the measuring system.
Die nach Einfall eines Laserpulses auftretende Zeitabhangigkeit der Abnahme von Photopotential und Photostrom wurde an passiven Eisenund Titanschichten gemessen. Die Abnahme des Photopotentials zeigte eine Kinetik der zweiten Reaktionsordnung. Wir fanden, daB die Abnahme des Photopotentials auf Titan sehr vie1 langsamer erfolgte als auf Eisen. An der Eisenelektrode wurde die Abhangigkeit der Photopotentialtransienten von pH-Wert, Potential und Lichtintensitat untersucht. Die Photostromtransienten waren in erster Linie bestimrnt von der elektronischen RC Zeitkonstante der Zelle und des Measystems.
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