Mapping erosion-corrosion of WC/Co-Cr based composite coatings: Particle velocity and applied potential effects

M.M. Stack, T.M. Abd El-Badia

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

In studies of erosion-corrosion of composite based coatings, there have been few attempts to map the mechanisms of the erosion-corrosion process. This is despite the fact cermet-based coatings are being increasingly used to combat erosion on pipelines and pumps where the degradation is caused by a combination of sand particles and seawater. In addition, the interactions between the processes of erosion and corrosion have only been evaluated for a limited range of conditions, despite the fact that erosion-corrosion occurs over a wide range of variables in practice. In this study, the effects of velocity, particle concentration and potential were evaluated for a WC/Co-Cr based coating. The extent of wastage was assessed using scanning electron microscopy and weight loss techniques. Mechanisms of erosion-corrosion were identified from the results. The results were used to generate erosion-corrosion mechanism maps for the coated and uncoated specimens. Velocity/potential maps were constructed showing the transitions between the erosion-corrosion regimes as a function of these parameters. The extent of synergy was also superimposed on such maps, showing the conditions where synergistic effects were likely to be at a minimum for the main process parameters.
Original languageEnglish
Pages (from-to)1335-1347
Number of pages12
JournalSurface and Coatings Technology
Volume201
Issue number3-4
DOIs
Publication statusPublished - 2006

Fingerprint

Composite coatings
erosion
Erosion
corrosion
Corrosion
coatings
composite materials
Coatings
Cermet Cements
combat
Seawater
sands
Sand
Pipelines
Pumps
pumps
degradation
Degradation
Scanning electron microscopy
scanning electron microscopy

Keywords

  • plasma
  • velocity
  • dispersion
  • composite coating
  • tungsten carbide
  • surface treatment
  • erosion

Cite this

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title = "Mapping erosion-corrosion of WC/Co-Cr based composite coatings: Particle velocity and applied potential effects",
abstract = "In studies of erosion-corrosion of composite based coatings, there have been few attempts to map the mechanisms of the erosion-corrosion process. This is despite the fact cermet-based coatings are being increasingly used to combat erosion on pipelines and pumps where the degradation is caused by a combination of sand particles and seawater. In addition, the interactions between the processes of erosion and corrosion have only been evaluated for a limited range of conditions, despite the fact that erosion-corrosion occurs over a wide range of variables in practice. In this study, the effects of velocity, particle concentration and potential were evaluated for a WC/Co-Cr based coating. The extent of wastage was assessed using scanning electron microscopy and weight loss techniques. Mechanisms of erosion-corrosion were identified from the results. The results were used to generate erosion-corrosion mechanism maps for the coated and uncoated specimens. Velocity/potential maps were constructed showing the transitions between the erosion-corrosion regimes as a function of these parameters. The extent of synergy was also superimposed on such maps, showing the conditions where synergistic effects were likely to be at a minimum for the main process parameters.",
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Mapping erosion-corrosion of WC/Co-Cr based composite coatings: Particle velocity and applied potential effects. / Stack, M.M.; Abd El-Badia, T.M.

In: Surface and Coatings Technology, Vol. 201, No. 3-4, 2006, p. 1335-1347.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Mapping erosion-corrosion of WC/Co-Cr based composite coatings: Particle velocity and applied potential effects

AU - Stack, M.M.

AU - Abd El-Badia, T.M.

PY - 2006

Y1 - 2006

N2 - In studies of erosion-corrosion of composite based coatings, there have been few attempts to map the mechanisms of the erosion-corrosion process. This is despite the fact cermet-based coatings are being increasingly used to combat erosion on pipelines and pumps where the degradation is caused by a combination of sand particles and seawater. In addition, the interactions between the processes of erosion and corrosion have only been evaluated for a limited range of conditions, despite the fact that erosion-corrosion occurs over a wide range of variables in practice. In this study, the effects of velocity, particle concentration and potential were evaluated for a WC/Co-Cr based coating. The extent of wastage was assessed using scanning electron microscopy and weight loss techniques. Mechanisms of erosion-corrosion were identified from the results. The results were used to generate erosion-corrosion mechanism maps for the coated and uncoated specimens. Velocity/potential maps were constructed showing the transitions between the erosion-corrosion regimes as a function of these parameters. The extent of synergy was also superimposed on such maps, showing the conditions where synergistic effects were likely to be at a minimum for the main process parameters.

AB - In studies of erosion-corrosion of composite based coatings, there have been few attempts to map the mechanisms of the erosion-corrosion process. This is despite the fact cermet-based coatings are being increasingly used to combat erosion on pipelines and pumps where the degradation is caused by a combination of sand particles and seawater. In addition, the interactions between the processes of erosion and corrosion have only been evaluated for a limited range of conditions, despite the fact that erosion-corrosion occurs over a wide range of variables in practice. In this study, the effects of velocity, particle concentration and potential were evaluated for a WC/Co-Cr based coating. The extent of wastage was assessed using scanning electron microscopy and weight loss techniques. Mechanisms of erosion-corrosion were identified from the results. The results were used to generate erosion-corrosion mechanism maps for the coated and uncoated specimens. Velocity/potential maps were constructed showing the transitions between the erosion-corrosion regimes as a function of these parameters. The extent of synergy was also superimposed on such maps, showing the conditions where synergistic effects were likely to be at a minimum for the main process parameters.

KW - plasma

KW - velocity

KW - dispersion

KW - composite coating

KW - tungsten carbide

KW - surface treatment

KW - erosion

UR - http://dx.doi.org/10.1016/j.surfcoat.2006.01.069

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