In a previous paper [l], we sought to demonstrate the validity of the complete current-time relationship for the diffusion controlled growth or hemispherical nuclei, ie equation (19) cf[l] 312 I(L) = zFNoAM"2(2DC)3'2
Electrochemical study of copper in molten alkali nitrates
β Scribed by A. Conte
- Publisher
- Elsevier Science
- Year
- 1966
- Tongue
- English
- Weight
- 480 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0013-4686
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β¦ Synopsis
Preliminary results on the electrochemical behaviour of copper in contact with fused NaNO,-KNO, at 250Β°C are reported. Electrode-potential measurements and X-ray analysis indicate that films formed on the copper surface consist mainly of Cu,O. Passivation of copper is induced by anodic polarization. A possible mechanism of the anodic passivation of copper is discussed. Rkun&Des resultats prkliminaires sont dorm&s sur le comportement Blectrochimique du cuivre en contact avec le melange fondu NaNO,-KNO,, a 250Β°C. Les mesures de potentiel et les analyses aux rayons X indiquent que les films qui se forment sur la surface du cuivre consistent essentiellement en Cu,O. Une passivation du cuivre est induite par polarisation anodique. On discute un mkcanisme possible de la passivation anodique du cuivre. Zusammenf~g-Es wird kurz tiber des elektrochemische Verhalten von Kupfer im Kontakt mit geschmolzenem NaNO,-KNO, bei 250Β°C berichtet. Messungen der Elektrodenpotentiale und Roentgenstahlenanalyse deuten auf die Bildung einer Schicht von Cu,O auf der Kupferoberlltiche hin. Eine Passivitiit des Kupfers kann durch anodische Polarisation induziert werden. Ein wahrscheinlicher Mechanismus der anodischen Passivierung wird bcsprochen.
π SIMILAR VOLUMES
The chronopotentiometric behaviour of NaNO,-KNO\* melts made basic with OH-, 04\*-or electrogenerated Oa-has been studied in the temperature range 240-350Β°C. The anodic curves exhibit two diffusion-controlled steps corresponding to the reactions and 10z-j -2e-c+0, NO,--e 4 NO,. Oxygen evolution from
The electrochemical behaviour of Ni electrodes in a KNO, melt in the 350400Β°C temperature range has been studied, using the cyclic voltammetry method. The occurrence of an additional anodic double-peak is attributed to some ionic species of nickelite (NiO:-) and nickelate (NiO;) type, of a very diff