The University of Southampton
University of Southampton Institutional Repository

A simultaneous screening of the corrosion resistance of Ni–W thin film alloys

A simultaneous screening of the corrosion resistance of Ni–W thin film alloys
A simultaneous screening of the corrosion resistance of Ni–W thin film alloys
A range of Ni–W thin film alloys have been synthesised by evaporation from atomic sources to produce a compositional gradient across the substrate, and characterised by X-ray diffraction (phase identification and crystallite size) and EDX (composition). The corrosion resistance of 100 discrete alloy compositions has been measured simultaneously in identical environments using a high-throughput screening protocol based on cyclic voltammetry. The corrosion resistances and potentials are extracted from potentiodynamic data by both the linear polarisation resistance (LPR) and Tafel extrapolation methods; results from these are shown to be self-consistent. The high-throughput approach allows, for the first time, a direct correlation to be made between the bulk crystalline phases and morphology, and the corrosion behaviour of Ni–W alloys. The incorporation of W in the Ni–W solid solution at low W compositions results in a continuous reduction in crystallite size, a small cathodic shift in corrosion potential, and a small reduction in corrosion resistance. A large cathodic shift in corrosion potential together with a significant increase in the corrosion resistance is observed for alloy compositions greater than 24%at. W. This composition range coincides with the formation of the amorphous phase.
0013-4686
930-936
Aljohani, Talal A.
4b7c0518-3fc9-4564-975e-d013ed6274c4
Hayden, Brian E.
35335c7e-976e-4852-aff9-f4294215d0a4
Aljohani, Talal A.
4b7c0518-3fc9-4564-975e-d013ed6274c4
Hayden, Brian E.
35335c7e-976e-4852-aff9-f4294215d0a4

Aljohani, Talal A. and Hayden, Brian E. (2013) A simultaneous screening of the corrosion resistance of Ni–W thin film alloys. Electrochimica Acta, 111, 930-936. (doi:10.1016/j.electacta.2013.08.097).

Record type: Article

Abstract

A range of Ni–W thin film alloys have been synthesised by evaporation from atomic sources to produce a compositional gradient across the substrate, and characterised by X-ray diffraction (phase identification and crystallite size) and EDX (composition). The corrosion resistance of 100 discrete alloy compositions has been measured simultaneously in identical environments using a high-throughput screening protocol based on cyclic voltammetry. The corrosion resistances and potentials are extracted from potentiodynamic data by both the linear polarisation resistance (LPR) and Tafel extrapolation methods; results from these are shown to be self-consistent. The high-throughput approach allows, for the first time, a direct correlation to be made between the bulk crystalline phases and morphology, and the corrosion behaviour of Ni–W alloys. The incorporation of W in the Ni–W solid solution at low W compositions results in a continuous reduction in crystallite size, a small cathodic shift in corrosion potential, and a small reduction in corrosion resistance. A large cathodic shift in corrosion potential together with a significant increase in the corrosion resistance is observed for alloy compositions greater than 24%at. W. This composition range coincides with the formation of the amorphous phase.

Full text not available from this repository.

More information

Accepted/In Press date: 16 August 2013
e-pub ahead of print date: 30 August 2013
Published date: 30 November 2013
Organisations: Electrochemistry

Identifiers

Local EPrints ID: 403380
URI: https://eprints.soton.ac.uk/id/eprint/403380
ISSN: 0013-4686
PURE UUID: 1eb46299-af8b-43e5-a563-ed2dd3281cb6

Catalogue record

Date deposited: 30 Nov 2016 14:03
Last modified: 15 Jul 2019 19:52

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×