High temperature oxidation protective chromium-based coatings prepared by IBAD and PACVD methods

Chromium nitride films were prepared by high energy (90 keV) IBAD method and chromium oxide films were prepared by PACVD method on AISI 316 stainless steel. The chemical composition was evaluated by electron beam microanalysis. The mechanical properties of coatings were tested by Vickers indenter, scratch tester and calotest. The films were hard and exhibited a satisfactory adhesion to the steel substrate. The corrosion resistance of the coatings was tested at 700–1000 °C in oxidizing atmosphere (air). The corrosion kinetics was evaluated by the gravimetric method. The total corrosion exposure was up to 1000 h. The films decreased high temperature oxidation of stainless steel substrates.