Parametric optimization of corrosion and erosive wear performance of FeCrCoNiSiB coated Q235 steel by using Taguchi's method

Abstract

AbstractHigh‐speed oxy‐fuel warm showering is utilized to cover Q235 steel with Fe32Cr21Co21Ni16Si5B5 and Fe43Cr16Co12Ni14Si5B10. The resistance of coatings to slurry wear is tested using a jet‐type apparatus. Investigations of the surface are conducted. Taguchi's and wear model verify the significance of impact of the most important factors. In this case, the wear model‘s proposed process closely matches with the experiments. In this study, the impact velocity was entitled as the most influential component, with a commitment proportion of 70 %, trailed by the impingement point, with proportions of 28.16 % and 28.70 % for Fe32Cr21Co21Ni16Si5B5 and Fe43Cr16Co12Ni14Si5B10, separately. It is by and large concurred that the main success of the control boundaries is influence speed>impingement point>erodent feed rate>erodent size for Fe43Cr16Co12Ni14Si5B10, and the opposite is true for Fe43Cr16Co12Ni14Si5B10. Scanning electron microscopy has shown that the principal erosion processes for Fe32Cr21Co21Ni16Si5B5 and Fe43Cr16Co12Ni14Si5B10 coatings are miniature cutting and blended cutting and furrowing at low impingement point while platelets are apparent at ordinary impingement point. Coatings formed passivation films, as shown by their greater value relative to the substrate.