Hot Corrosion Behavior of Arc-Sprayed NiCrB and NiCrTi Coatings with Different Oxide Contents

In this study, newly developed NiCrB and conventional NiCrTi coatings were produced by arc spraying using compressed air nitrogen as atomization gases. way, four with different oxide contents produced. The investigated in terms of their phase compositions, oxygen contents, microstructures. results showed that the pronouncedly reduced nitrogen-atomized compared to air-atomized. about one-fourth those corresponding air-atomized coatings, respectively. No significant phases observed XRD patterns coatings. Moreover, corrosion behavior was studied a hot test molten Na2SO4-10 wt.% NaCl salt at T = 800 °C. All significantly corroded under condition. However, exhibited higher resistance than prepared more severely initial stage atomization. coating best due low chromium content addition boron.