A critical review of the tribocorrosion of cemented and thermal sprayed tungsten carbide

Cemented and thermal sprayed tungsten carbide are extensively used in a wide range of applications, ranging from downhole drilling tools and oil and gas valves to gas turbine engines. These WC based systems offer improved wear resistance as a result of hard ceramic phases surrounded by a metallic bi...

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Bibliographic Details
Published in:Tribology international 2018-03, Vol.119, p.491-509
Main Authors: Wood, Robert J.K., Herd, Stephen, Thakare, Mandar R.
Format: Article
Language:English
Subjects:
Aqueous environments
Cemented carbides
Cementing
Ceramic
Ceramics
Corrosion resistance
Corrosion tests
Corrosive wear
Couplings
Drilling
Gas turbine engines
Gas valves
Natural gas
Numerical analysis
Synergism
Thermal spraying
Thermally-sprayed coating
Tungsten carbide
Wear mechanisms
Wear resistance
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Summary:Cemented and thermal sprayed tungsten carbide are extensively used in a wide range of applications, ranging from downhole drilling tools and oil and gas valves to gas turbine engines. These WC based systems offer improved wear resistance as a result of hard ceramic phases surrounded by a metallic binder matrix. However, the presence of hard and soft phases within these materials also leads to differing wear mechanisms and the formation of micro-galvanic couplings in aqueous environments often result in a reduction in combined wear-corrosion resistance. This paper examines the wear-corrosion performance of these WC based systems in a range of wear, electrochemical and wear-corrosion tests to develop models and establish relationships between wear mechanisms and environmental factors such as pH. •Significant difference in composition and structure between cemented WC and WC coating.•Tribocorrosion is an area of significant interest and needs further understanding.•Understanding of individual degradation mechanisms is required.•Numerical modelling provides a method for understanding and prediction of degradation.
ISSN:0301-679X
1879-2464
DOI:10.1016/j.triboint.2017.10.006