Corrosion and synergy in a WCCoCr HVOF thermal spray coating—understanding their role in erosion–corrosion degradation

Souza, V.A.D.; Neville, Anne

doi:10.1016/j.wear.2004.12.003

Cited by 114 publications

(58 citation statements)

References 22 publications

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“…Rate of erosion increased with increase in particle size. These results were similar to as reported by various authors [8,9].…”

Section: Effect Of Average Particle Size On the Slurry Erosionsupporting

confidence: 93%

Experimental Investigation of Slurry Erosion Behaviour of Hard Faced AISI 316L Stainless Steel

Singh¹,

Virdi²,

Goyal³

2015

ujme

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The slurry Erosion behaviour of AISI 316L stainless steel has been investigated in this research work. The samples hard faced with cobalt based (stellite-6) and titanium based alloys specimens were used during the experimentation. Erosion test was performed on a Slurry Erosion test rig fabricated as per ASTM standards G73. Three variables which were used in the experimentation are concentration level of the Slurry, nozzle diameter of the jet and average particle size of erodent. After a fix time, weight loss of samples was compared. It was found that the samples hard faced with titanium based alloy are more hard than hard faced with cobalt based alloy and substrate material.

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“…Rate of erosion increased with increase in particle size. These results were similar to as reported by various authors [8,9].…”

Section: Effect Of Average Particle Size On the Slurry Erosionsupporting

confidence: 93%

Experimental Investigation of Slurry Erosion Behaviour of Hard Faced AISI 316L Stainless Steel

Singh¹,

Virdi²,

Goyal³

2015

ujme

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“…Recent research has shown that this solution has difficulties, as Souza and Neville [41] and Bello et al [42] and Thakare et al [43] show, the performance of WC-Co-Cr systems can suffer localized corrosion of the carbide phases, thereby compromising the performance of such surfaces as well as the importance of composition and integrity of Cr based passive films.…”

Section: Tribo-corrosion Of Different Coating Typesmentioning

confidence: 99%

“…The role of binder corrosion in the erosion-corrosion degradation of HVOF thermally sprayed WC-Co-Cr coatings has been studied by Souza and Neville [41] using electrochemical polarization techniques in a 3.5% NaCl solution at varying temperatures. They report that initially corrosion proceeds primarily by dissolution of the Co phase, depending on the integrity and thickness of the passive film (thought to be mainly Cr 2 O 3 ) on the binder phase.…”

Section: Thermally Sprayed Coatingsmentioning

confidence: 99%

Tribo-corrosion of coatings: a review

Wood¹

2007

J. Phys. D: Appl. Phys.

230

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This paper reviews the available literature relating to the emerging research into the performance of coatings under combined wear and corrosion conditions. Understanding how coatings perform under these tribo-corrosion conditions is essential if the service life of equipment is to be predicted and to allow service life to be extended. Therefore, the tribo-corrosion performance of coatings deposited by a variety of techniques is discussed and the main mechanisms associated with their degradation under combined wear and corrosion highlighted. Coating composition, microstructure, defect level, adhesion, cohesion and substrate properties are seen as some of the critical elements in coating performance when subjected to tribo-corrosion contacts. The importance of post-coating deposition treatments such as laser resurfacing and sealing are also discussed. Interactions between wear and corrosion mechanisms are identified along with some models and mapping techniques that aim to inform coating selection and predict performance. Recent investigations into mono-layer as well as multilayered and functionally graded coatings are reviewed as candidates for wear-corrosion resistant surfaces. The review reveals the need for a more considered approach to tribo-corrosion testing and the way in which the results are analysed and presented. For example, the test conditions should be appropriate to the coating system under test; the level of in situ instrumentation deployed and the post-test analysis of in situ electrochemical data should be carefully selected as well as details given of the composition of any surface tribofilms formed and the identification of the degradation mechanisms.

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“…Under slurry impingement conditions, coatings are subjected to a highly destructive environment and are degraded as a result of two contributing factors; mechanical wear due to sand particulates within the slurry impacting on the material surface and corrosion from the saline solution [13]. Under these conditions, the degradation process is known as erosion-corrosion.…”

Section: I In Nt Tr Ro Od Du Uc Ct Ti Io On Nmentioning

confidence: 99%

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

Peat

Galloway

Toumpis

et al. 2016

Surface and Coatings Technology

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A Ab bs st tr ra ac ct tThe 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. 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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Corrosion and synergy in a WCCoCr HVOF thermal spray coating—understanding their role in erosion–corrosion degradation

Cited by 114 publications

References 22 publications

Experimental Investigation of Slurry Erosion Behaviour of Hard Faced AISI 316L Stainless Steel

Experimental Investigation of Slurry Erosion Behaviour of Hard Faced AISI 316L Stainless Steel

Tribo-corrosion of coatings: a review

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

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