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Synergistic effects of cavitation erosion and corrosion for nickel aluminium bronze with oxide film in 3.5% NaCl solution

Synergistic effects of cavitation erosion and corrosion for nickel aluminium bronze with oxide film in 3.5% NaCl solution
Synergistic effects of cavitation erosion and corrosion for nickel aluminium bronze with oxide film in 3.5% NaCl solution
Cavitation erosion-corrosion of nickel aluminium bronze with oxide films formed under two different conditions, oxide formed in air for 1 week and oxide formed after 3 months immersion in 3.5% NaCl solution, was conducted using a 19.5 kHz indirect ultrasonic vibratory system at a peak-to-peak amplitude of 80 (?}0.2) ?m in 3.5% NaCl solution. The synergistic interactions between the cavitation erosion and corrosion were determined via experiment comprising of three different tests: pure cavitation erosion test in distilled water, pure in-situ electrochemical corrosion tests using open circuit potentials (OCP) and polarization scanning, and a combination of cavitation erosion-corrosion kept at OCP in 3.5% NaCl solution to understand the overall synergism existing between cavitation wear and corrosion. The results were then analysed and compared using mass loss analysis. Scanning electron microscopy was used to analyse microstructural characteristics of the cavitated sample surfaces, as well as the transverse--?sections of the surface features. It was seen that samples with water formed film exhibited high synergy and was more susceptible to selective phase attack and phase boundary erosion in comparison to air-formed film.
cavitation erosion--?corrosion, tribo--?corrosion, synergy, nickel aluminium bronze
0043-1648
Basumatary, Jahnabi
f68916bd-e5d9-432d-92dd-e33c30330fa3
Wood, Robert
d9523d31-41a8-459a-8831-70e29ffe8a73
Basumatary, Jahnabi
f68916bd-e5d9-432d-92dd-e33c30330fa3
Wood, Robert
d9523d31-41a8-459a-8831-70e29ffe8a73

Basumatary, Jahnabi and Wood, Robert (2017) Synergistic effects of cavitation erosion and corrosion for nickel aluminium bronze with oxide film in 3.5% NaCl solution. [in special issue: WOM2017] Wear. (doi:10.1016/j.wear.2017.01.047).

Record type: Article

Abstract

Cavitation erosion-corrosion of nickel aluminium bronze with oxide films formed under two different conditions, oxide formed in air for 1 week and oxide formed after 3 months immersion in 3.5% NaCl solution, was conducted using a 19.5 kHz indirect ultrasonic vibratory system at a peak-to-peak amplitude of 80 (?}0.2) ?m in 3.5% NaCl solution. The synergistic interactions between the cavitation erosion and corrosion were determined via experiment comprising of three different tests: pure cavitation erosion test in distilled water, pure in-situ electrochemical corrosion tests using open circuit potentials (OCP) and polarization scanning, and a combination of cavitation erosion-corrosion kept at OCP in 3.5% NaCl solution to understand the overall synergism existing between cavitation wear and corrosion. The results were then analysed and compared using mass loss analysis. Scanning electron microscopy was used to analyse microstructural characteristics of the cavitated sample surfaces, as well as the transverse--?sections of the surface features. It was seen that samples with water formed film exhibited high synergy and was more susceptible to selective phase attack and phase boundary erosion in comparison to air-formed film.

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Accepted/In Press date: 12 January 2017
e-pub ahead of print date: 15 June 2017
Venue - Dates: 21st International Conference on Wear of Materials, United States, 2017-03-26 - 2017-03-30
Keywords: cavitation erosion--?corrosion, tribo--?corrosion, synergy, nickel aluminium bronze
Organisations: nCATS Group

Identifiers

Local EPrints ID: 405429
URI: http://eprints.soton.ac.uk/id/eprint/405429
ISSN: 0043-1648
PURE UUID: 0aaa3f66-4d54-4ce9-88c6-4bad15b1bdd3
ORCID for Robert Wood: ORCID iD orcid.org/0000-0003-0681-9239

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Date deposited: 03 Feb 2017 14:39
Last modified: 17 Dec 2019 06:24

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Author: Jahnabi Basumatary
Author: Robert Wood ORCID iD

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