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Electrodeposition of Ni-P alloy coatings: a review

Electrodeposition of Ni-P alloy coatings: a review
Electrodeposition of Ni-P alloy coatings: a review

Ni[sbnd]P coatings are extensively employed in engineering, owing to their mechanical and tribological properties which confer protection against corrosion and wear. Classically, such deposits can have a thickness of <500 μm, although there is a trend to thinner coatings to achieve faster deposition and lower costs. Depending on their composition and structure, as-plated deposits demonstrate good mechanical, tribological and electrochemical features, catalytic activity but also beneficial magnetic characteristics. Following thermal treatment, the hardness of Ni[sbnd]P metal deposits can approach or exceed that of hard Cr coatings. This paper provides a general survey of research on the electrodeposition of Ni[sbnd]P binary alloy coatings. Proposed phosphorus incorporation mechanisms, Ni[sbnd]P alloy microstructure before and after thermal treatment. Mechanical, tribological, corrosion, catalytic and magnetic properties are considered, as are the key process variables influencing the phosphorus content of deposits and the roles of the major electrolytic bath constituents. The merits of employing pulse plating and fabrication of newer (layered and functionally graded)structures are concisely explored. Interaction of four aspects: substrate state, electrolyte composition, process conditions and deposit properties is seen to be important during electrodeposition of Ni[sbnd]P alloys; areas deserving further study are identified.

coatings, electrochemical, electrolyte, engineering, mechanical properties, tribology
0257-8972
198-220
Lelevic, Aleksandra
8d2a7ea8-6bfd-4746-b023-69f0a2e968d5
Walsh, Frank
309528e7-062e-439b-af40-9309bc91efb2
Lelevic, Aleksandra
8d2a7ea8-6bfd-4746-b023-69f0a2e968d5
Walsh, Frank
309528e7-062e-439b-af40-9309bc91efb2

Lelevic, Aleksandra and Walsh, Frank (2019) Electrodeposition of Ni-P alloy coatings: a review. Surface and Coatings Technology, 369, 198-220. (doi:10.1016/j.surfcoat.2019.03.055).

Record type: Review

Abstract

Ni[sbnd]P coatings are extensively employed in engineering, owing to their mechanical and tribological properties which confer protection against corrosion and wear. Classically, such deposits can have a thickness of <500 μm, although there is a trend to thinner coatings to achieve faster deposition and lower costs. Depending on their composition and structure, as-plated deposits demonstrate good mechanical, tribological and electrochemical features, catalytic activity but also beneficial magnetic characteristics. Following thermal treatment, the hardness of Ni[sbnd]P metal deposits can approach or exceed that of hard Cr coatings. This paper provides a general survey of research on the electrodeposition of Ni[sbnd]P binary alloy coatings. Proposed phosphorus incorporation mechanisms, Ni[sbnd]P alloy microstructure before and after thermal treatment. Mechanical, tribological, corrosion, catalytic and magnetic properties are considered, as are the key process variables influencing the phosphorus content of deposits and the roles of the major electrolytic bath constituents. The merits of employing pulse plating and fabrication of newer (layered and functionally graded)structures are concisely explored. Interaction of four aspects: substrate state, electrolyte composition, process conditions and deposit properties is seen to be important during electrodeposition of Ni[sbnd]P alloys; areas deserving further study are identified.

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Accepted/In Press date: 22 March 2019
e-pub ahead of print date: 28 March 2019
Published date: 15 July 2019
Keywords: coatings, electrochemical, electrolyte, engineering, mechanical properties, tribology

Identifiers

Local EPrints ID: 432819
URI: http://eprints.soton.ac.uk/id/eprint/432819
ISSN: 0257-8972
PURE UUID: cfa6e300-7e14-484e-8da2-c95884982b4e

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Date deposited: 26 Jul 2019 16:30
Last modified: 06 Jun 2024 04:16

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Contributors

Author: Aleksandra Lelevic
Author: Frank Walsh

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