Accession Number : AD0621802

Title :   FORMATION MECHANISM OF DOUBLE-LAYER OXIDE SCALE ON COPPER--ZINC ALLOYS,

Corporate Author : AEROSPACE INFORMATION DIV LIBRARY OF CONGRESS WASHINGTON D C

Personal Author(s) : Czerski,Lucjan ; Mrowec,Stanislaw ; Werber,Teodor

Report Date : 06 DEC 1963

Pagination or Media Count : 12

Abstract : The results obtained by the 'marker' method show that the double layer of scale forms on the alloys as a result of an outward diffusion of metal and an inward diffusion of oxygen. The 'marker' in all instances was found at the boundary of both layers of scale. Investigations of the chemical composition of the scale showed that the outer layer regardless of alloy composition consists of cuprous oxide Cu2O, while the inner layer consists of a two-phase mixture of Cu2O and ZnO. Furthermore, it is shown that the inner layer is of unstable composition and varies with distance from the metallic core. The highest ZnO content was always found near the scale-alloy interface. (Author)

Descriptors :   (*OXIDATION, COPPER ALLOYS), (*COPPER ALLOYS, ZINC ALLOYS), (*ZINC ALLOYS, COPPER ALLOYS), OXIDES, REACTION KINETICS, DIFFUSION

Distribution Statement : APPROVED FOR PUBLIC RELEASE