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Flow influenced electrochemical corrosion of nickel aluminium bronze – Part II. Anodic polarisation and derivation of the mixed potential

Flow influenced electrochemical corrosion of nickel aluminium bronze – Part II. Anodic polarisation and derivation of the mixed potential
Flow influenced electrochemical corrosion of nickel aluminium bronze – Part II. Anodic polarisation and derivation of the mixed potential
The mixed charge and mass transfer influenced anodic current response of CA 104 nickel aluminium bronze (NAB) is presented as a function of both laminar (rotating disc electrode) and fully turbulent (rotating cylinder electrode) fluid flow. At low values of positive polarisation, the overall behaviour of the freshly polished material in filtered and artificial seawaters is closely related to that of unalloyed copper. The primary anodic reaction in this case is the selective dissolution of the copper component via a cuprous di-chloride complex anion. At large positive polarisation, the solid solution mole fraction for the production of a discrete film of protective alumina (Al2O3) is examined as a function of Reynolds number and discussed in terms of a new mechanism for the passivation NAB in seawater. The polarisation data is used to replicate experimental Reynolds number dependent, corrosion potentials and corrosion current densities over a wide range of electrode angular velocities.
flow-enhanced corrosion, mass transfer, nickel aluminium bronze, rotating cylinder electrode, rotating disc electrode, seawater
1241-1248
Kear, G.
eb25b3ff-b75c-47ba-b545-233fee85b0a3
Barker, B.D.
74e8d2f7-7cd3-418c-8190-ebf2197b51b9
Stokes, K.
5fb4e7f7-2f7e-4e6e-a045-6d7690626695
Walsh, F.C.
309528e7-062e-439b-af40-9309bc91efb2
Kear, G.
eb25b3ff-b75c-47ba-b545-233fee85b0a3
Barker, B.D.
74e8d2f7-7cd3-418c-8190-ebf2197b51b9
Stokes, K.
5fb4e7f7-2f7e-4e6e-a045-6d7690626695
Walsh, F.C.
309528e7-062e-439b-af40-9309bc91efb2

Kear, G., Barker, B.D., Stokes, K. and Walsh, F.C. (2004) Flow influenced electrochemical corrosion of nickel aluminium bronze – Part II. Anodic polarisation and derivation of the mixed potential. Journal of Applied Electrochemistry, 34 (12), 1241-1248. (doi:10.1007/s10800-004-1759-0).

Record type: Article

Abstract

The mixed charge and mass transfer influenced anodic current response of CA 104 nickel aluminium bronze (NAB) is presented as a function of both laminar (rotating disc electrode) and fully turbulent (rotating cylinder electrode) fluid flow. At low values of positive polarisation, the overall behaviour of the freshly polished material in filtered and artificial seawaters is closely related to that of unalloyed copper. The primary anodic reaction in this case is the selective dissolution of the copper component via a cuprous di-chloride complex anion. At large positive polarisation, the solid solution mole fraction for the production of a discrete film of protective alumina (Al2O3) is examined as a function of Reynolds number and discussed in terms of a new mechanism for the passivation NAB in seawater. The polarisation data is used to replicate experimental Reynolds number dependent, corrosion potentials and corrosion current densities over a wide range of electrode angular velocities.

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Published date: 2004
Keywords: flow-enhanced corrosion, mass transfer, nickel aluminium bronze, rotating cylinder electrode, rotating disc electrode, seawater

Identifiers

Local EPrints ID: 23116
URI: http://eprints.soton.ac.uk/id/eprint/23116
PURE UUID: 132b9057-7bfc-4160-a866-517bbb2dd11c

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Date deposited: 23 Mar 2006
Last modified: 15 Mar 2024 06:44

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Contributors

Author: G. Kear
Author: B.D. Barker
Author: K. Stokes
Author: F.C. Walsh

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