Powdered filler metals are increasingly commonly used in surfacing and spraying processes involving the use of concentrated energy (e.g. plasma arc or the laser beam). The article presents industrial applications of processes tasked with the protection of surfaces against abrasive and cavitation wear. Some of the methods enabling the obtainment of protective layers include plasma powder transferred arc surfacing or gas-powder spraying. Technological tests revealed the usability of both these technologies in relation to duplex steels and led to the obtainment of higher protection against and resistance to abrasive and cavitation wear when using NiBSi powders than that obtained by elements made of the steel alone. Tests concerning resistance to abrasive and cavitation wear followed a six-month long period of operation. Test specimens were subjected to visual tests, macroscopic metallographic tests, microscopic measurements of sprayed layers and the analysis of the coating microstructure. The tests revealed the obtainment of high protective properties of coatings made using gas-powder spraying involving the post-spray remelting process.  

doi: 10.17729/ebis.2022.5/6