✦ LIBER ✦

Electrochemical behaviour of aluminium in sodiumpolysulphide melts at 330°C

✍ Scribed by R. Knoedler; S. Mennicke

Publisher: Elsevier Science
Year: 1983
Tongue: English
Weight: 328 KB
Volume: 28
Category: Article
ISSN: 0013-4686
DOI: 10.1016/0013-4686(83)80004-8

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✦ Synopsis

An experimental set-up was developed which allows the investigation of electrodes in pure sodiumpolysulphide melts. It could be shown that aluminium forms a passivating layer of aluminiumsulphlde ar an anodic potential of about 1 V zs a sodium reference electrode. Below this value, aluminium is active. With a copper containmgaluminium alloy the passivating potent&4 I$ increased to about 1.2 V. Pining corrosion was observed after operating the alummium electrode at current densities of several hundred mA cm-'. Reaction mechanisms which could exulain the acme, passlvc and trampassive rcgmns observed, are discussed.

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