Characterisation and Corrosion-Erosion Behaviour of Carbide based Thermal Spray Coatings


Thermal spraying has emerged as a suitable and effective surface engineering technology and is widely used to apply wear, erosion and corrosion protective coatings for various kinds of industrial applications. Cr3C2-based coatings have been applied to a wide range of industrial components. Cr3C2-NiCr coatings offer greater corrosion and oxidation resistance, also having a high melting point and maintaining high hardness, strength and wear resistance up to a maximum operating temperature of 900 °C. The corrosion resistance is provided by NiCr matrix while the wear resistance is mainly due to the carbide ceramic phase. This paper reviews the performance, developments and applications of Cr3C2-NiCr thermal spray coatings for corrosion/erosion-corrosion under different types of environments and outlines the characterization of Cr3C2-NiCr coatings with respect to their microstructure and mechanical properties, together with some brief characterisation work by the author for HVOF sprayed 75Cr3C2-25NiCr coating on T91 boiler steel.

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S. Chatha, H. Sidhu and B. Sidhu, "Characterisation and Corrosion-Erosion Behaviour of Carbide based Thermal Spray Coatings," Journal of Minerals and Materials Characterization and Engineering, Vol. 11 No. 6, 2012, pp. 569-586. doi: 10.4236/jmmce.2012.116041.

Conflicts of Interest

The authors declare no conflicts of interest.


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