Abstract

The thickness loss rate was applied to evaluate the chlorine-induced high-temperature corrosion properties of four nickel-based cladding layers. The results indicate that merely increasing the Cr content cannot improve the corrosion resistance, but instead severely aggravates the internal corrosion. The characteristics of laser cladding technology render the role of Mo in enhancing corrosion resistance closely related to its content and distribution. Transverse penetration cracks tend to occur in NiO surrounded by NiCr2O4. However, the generation of short rod-like NbO2 enhances the mechanical properties of the NiO layer, leading to the absence of such cracks.

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