Near-wall hydrodynamic effects related to flow-induced localized corrosion

The relationship between near‐wall hydrodynamic conditions and flow‐induced localized corrosion of copper alloys was investigated. Flow‐induced localized corrosion tests for copper alloys were conducted in corrosive solutions using a jet‐in‐slit testing apparatus, in which various hydrodynamic condi...

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Bibliographic Details
Published in:Materials and corrosion 2009-07, Vol.60 (7), p.501-506
Main Author: Yabuki, A.
Format: Article
Language:English
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Summary:The relationship between near‐wall hydrodynamic conditions and flow‐induced localized corrosion of copper alloys was investigated. Flow‐induced localized corrosion tests for copper alloys were conducted in corrosive solutions using a jet‐in‐slit testing apparatus, in which various hydrodynamic conditions were reproduced. To evaluate local damage, the profiles of the specimens were measured using a surface roughness meter. In addition, the near‐wall hydrodynamic conditions on the material surface in the apparatus were measured by pressure gauges to determine the distribution of near‐wall velocities and velocity fluctuations. In the equation used to predict corrosion damage, three types of hydrodynamic conditions were applied as parameters related to the mass transfer coefficient in the film of corrosion products. The damage profiles calculated from the equation could be fitted to that obtained from the corrosion test.
ISSN:0947-5117
1521-4176
DOI:10.1002/maco.200805114