Oxidation of Electrodeposited Nickel–1.6 Wt% Alumina Available to Purchase

Oxidation of electrodeposited nickel containing 1.6 wt% alumina particles dispersed in it has been studied in the temperature range 800 to 975 C. Metallographic examination of specimens oxidized for 24 hours or more at 900 C and above revealed a two-layer scale; an outer columnar grey layer and an inner fine-grained layer. Although strongly adherent scales were formed, a comparative investigation with electrodeposited nickel at only 900 C indicated a slightly higher rate constant for Ni-Al₂O₃.