Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10628645 | Corrosion Science | 2005 | 10 Pages |
Abstract
The stress corrosion cracking (SCC) susceptibility of pure copper and four α-brasses of different zinc alloy concentration in NaNO2 1 M solution, at various pH values, was studied by means of potentiodynamic polarisation curves and constant potential slow strain rate experiments. The results confirmed that passivity rupture was a necessary condition for SCC of α-brass and copper in nitrite solutions. Susceptibility to SCC was observed only when the potential was equal to or higher than a certain critical value at which passivity breakdown was triggered by the slow dynamic straining of the metal. Cracks were found only in those metal areas where passivity rupture had taken place.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
M.G. Alvarez, P. Lapitz, S.A. Fernández, J.R. Galvele,