Evaluation of the synergistic erosion-corrosion behaviour of HVOF thermal spray coatings

Tom Peat, Alexander Galloway, Athanasios Toumpis, David Harvey

Research output: Contribution to journalArticle

14 Citations (Scopus)
63 Downloads (Pure)

Abstract

The present study examines three High Velocity Oxy Fuel deposited coatings, Tungsten Carbide, Chromium Carbide and Aluminium Oxide, under slurry erosion-corrosion conditions. Coatings produced in this manner typically exhibit superior density and hardness over alternative thermal spray technologies, therefore are suitable for use in corrosive and highly erosive environments. The scope of the study concentrates on isolation of the contributing factors of erosion, corrosion and synergy through applied electrochemistry, as well as metallographic analysis to evaluate the mechanisms causing coating degradation. The aim of which is to provide comprehensive data on the performance of the mentioned coatings under erosion-corrosion in conditions representing a flowing environment. Results demonstrate the breakdown of Chromium Carbide and Aluminium Oxide coatings result in enhanced mass loss over the uncoated S355 steel. Despite this, results have shown Tungsten Carbide with a Cobalt binder to be an effective protective coating, resulting in a significant reduction in total material loss over uncoated S355 steel.
Original languageEnglish
Pages (from-to)37-48
Number of pages12
JournalSurface and Coatings Technology
Volume299
Early online date13 May 2016
Publication statusPublished - 15 Aug 2016

Fingerprint

erosion
sprayers
Erosion
corrosion
Corrosion
coatings
Coatings
evaluation
chromium carbides
tungsten carbides
Aluminum Oxide
Tungsten carbide
Steel
Chromium
Carbides
aluminum oxides
steels
Aluminum
Caustics
Oxides

Keywords

  • thermal spray coatings
  • corrosion
  • slurry erosion
  • synergy
  • wear
  • electrochemistry

Cite this

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abstract = "The present study examines three High Velocity Oxy Fuel deposited coatings, Tungsten Carbide, Chromium Carbide and Aluminium Oxide, under slurry erosion-corrosion conditions. Coatings produced in this manner typically exhibit superior density and hardness over alternative thermal spray technologies, therefore are suitable for use in corrosive and highly erosive environments. The scope of the study concentrates on isolation of the contributing factors of erosion, corrosion and synergy through applied electrochemistry, as well as metallographic analysis to evaluate the mechanisms causing coating degradation. The aim of which is to provide comprehensive data on the performance of the mentioned coatings under erosion-corrosion in conditions representing a flowing environment. Results demonstrate the breakdown of Chromium Carbide and Aluminium Oxide coatings result in enhanced mass loss over the uncoated S355 steel. Despite this, results have shown Tungsten Carbide with a Cobalt binder to be an effective protective coating, resulting in a significant reduction in total material loss over uncoated S355 steel.",
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Evaluation of the synergistic erosion-corrosion behaviour of HVOF thermal spray coatings. / Peat, Tom; Galloway, Alexander; Toumpis, Athanasios; Harvey, David.

In: Surface and Coatings Technology, Vol. 299, 15.08.2016, p. 37-48.

Research output: Contribution to journalArticle

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T1 - Evaluation of the synergistic erosion-corrosion behaviour of HVOF thermal spray coatings

AU - Peat, Tom

AU - Galloway, Alexander

AU - Toumpis, Athanasios

AU - Harvey, David

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Y1 - 2016/8/15

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AB - The present study examines three High Velocity Oxy Fuel deposited coatings, Tungsten Carbide, Chromium Carbide and Aluminium Oxide, under slurry erosion-corrosion conditions. Coatings produced in this manner typically exhibit superior density and hardness over alternative thermal spray technologies, therefore are suitable for use in corrosive and highly erosive environments. The scope of the study concentrates on isolation of the contributing factors of erosion, corrosion and synergy through applied electrochemistry, as well as metallographic analysis to evaluate the mechanisms causing coating degradation. The aim of which is to provide comprehensive data on the performance of the mentioned coatings under erosion-corrosion in conditions representing a flowing environment. Results demonstrate the breakdown of Chromium Carbide and Aluminium Oxide coatings result in enhanced mass loss over the uncoated S355 steel. Despite this, results have shown Tungsten Carbide with a Cobalt binder to be an effective protective coating, resulting in a significant reduction in total material loss over uncoated S355 steel.

KW - thermal spray coatings

KW - corrosion

KW - slurry erosion

KW - synergy

KW - wear

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JO - Surface and Coatings Technology

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