Surface engineering analysis of detonation-gun sprayed Cr3C2-NiCr coating under high-temperature oxidation and oxidation-erosion environments

► D-gun spray Cr3C2-NiCr coated steel showed better oxidation and oxidation-erosion resistance ► The coating showed good adherence to the boiler steel during the exposures with no spallation of its oxide scale ► Bare T22 steel suffered from accelerated oxidation in the form of intense spalling of the scale during oxidation in air ► Bare T22 steel suffered from higher weight loss during the exposure at 700 ± 10 °C in the actual boiler environment.