Thermal spraying technology today belongs to manufacturing technologies that significantly reduce production costs while achieving high utility performance. The paper focuses on the methodology of testing of selected technological tests, especially bending and twist tests, metallography and porosity analysis of layers made by HVOF technology. The above tests are used by standard for the quality control during production. Proper implementation and evaluation are key to detecting possible imperfections during production and the possibility of repairs. Sprayings samples were based on WC-Co, Cr3C2-NiCr, Stellite 6 made by HVOF technology on JP 5000, JP 8000 equipment’s.Keywords: HVOF, bending test, twist test, metallography, porosity
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