par Clerbois, Françoise 
;Neelemans, Lucien ;Massart, Jean
Référence Electrochimica acta, 11, 1, page (31-52)
Publication Publié, 1966-01
;Neelemans, Lucien ;Massart, Jean Référence Electrochimica acta, 11, 1, page (31-52)
Publication Publié, 1966-01
Article révisé par les pairs
| Résumé : | It is shown that the oscillation phenomena observed during the anodic passivation of metals can be distinguished as two cases, according to whether the response rate of the potentiostat is sufficient or not. The two cases are discussed. For the case of oscillations with a sufficient response rate, a "passivation" equation is established and linearized by well-known methods. The constants of an equivalent electrical circuit are then defined so that the relation between the external current and the cell pd is identical with the preceding linearized equation. Associating this circuit with a potentiostat, an equation for the functioning of the assembly is deduced. It is possible to show that a potentiostat with one time constant functions in a stable manner whereas one with two or more time constants can give oscillations. The criterion of instability of such systems is established. A potentiostatic scheme with one time constant is described. © 1966. |
