✍ Scribed by F Bouillon; J Stevens
No coin nor oath required. For personal study only.
Les auteurs Btudient I'influence de la pr&ence de faibles quantit&s de nickel sur l'oxydation du euivre aux temp&atures infbrieures ou 6gafe It 200°C et B pression atmosph&rique d'oxygbne pur. Dans ces conditions, il existe toujours un large domaine oti il ne se forme qu'un seul oxyde: C&O. Cotte 6tude montre que. (1) les alliages Cu-Ni & 5 et 10% de Ni s'oxydent moins vite que le cuivre pur pendant toute la pbriode BtudiBe, (2) les a&ages Cu-Ni & 0,5 et 1% de Ni s'oxydent pIus rapidement pendant une pBriode initiale dont la du&e est inversement proportionnelle B la concentration en Ni, (3) l'allirtge B 0,l y0 s'oxyde plus r~pidem0nt dans tout la domaine BtudiB, (4) l'oxyde cuivrique CuO apparait toujours plus t6t SUP lea f&ages. INFLUENCE OF SMALL QUANTITIES OF NICKEL ON THE OXIDATION OF COPPER The authors have studied the influence of small quantities of nickel on the oxidation in pure oxygen at atmospheric pressure, of copper at temperatures equal to and below 200°C. Under these conditions, there always exists a large region where only Cu,O is formed.
This study shows that.:
(1) the alloys of C-a-Ni containing 5 and 10% nickel oxidize less rapidly than pure copper during the period studied.
(2) alloys containing 0,5 and 1% nickel oxidize more rapidly during an initial period, the length of which varies inversely with the nickel content.
(3) the alloys containing 0,l per cent oxidizes the most rapidly during the period investigated.
(4) the oxide CuO always appears sooner on these alloys.
EINFLUSS GERINGER NICKELZUS~TZE AUF DIE OXYDATION VON KUPFER
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