This paper describes results from investigations of tungsten carbide (WC) coatings with high alloy binders. Experimental powders were manufactured by agglomeration/sintering using pre-alloyed metal particles together with WC particles. Coatings were sprayed by the HVOF process and investigated with respect to microstructure, hardness, erosion and erosion-corrosion. For comparison coatings from commercial powder materials were sprayed and investigated. This and previous work has demonstrated the importance of having a corrosion resistant binder. A corrosion resistant binder is of major importance for constructions where maintenance is difficult for instance in constructions for oil and gas production from wells at large depths in the North Sea. Improved coating quality will lead to increased life time for coated components, improved safety conditions, fewer shut-downs and large reductions in maintenance costs.

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