Benefits of Nickel-Bonded Carbide for Corrosive Applications

Introduction

Standard cemented carbide uses cobalt as the binder. In corrosive environments, cobalt can degrade. Nickel-bonded carbide provides superior corrosion resistance for demanding applications.

Corrosion Resistance

Nickel is more resistant to acids, alkalis, and other corrosive fluids than cobalt. Nickel-bonded carbide maintains its structural integrity in chemical processing, marine, and food-grade applications.

Mechanical Properties

Nickel-bonded carbide offers hardness and wear resistance similar to cobalt-bonded grades. While slightly lower in transverse rupture strength, it performs well in most wear applications.

Common Applications

Nickel-bonded carbide is used in mechanical seals, valve components, nozzles, pump parts, and food processing equipment. It is essential when corrosive fluids contact carbide surfaces.

Food and Pharmaceutical

Nickel-bonded grades are preferred in food and pharmaceutical processing where cobalt leaching is a concern. They meet stricter purity and corrosion requirements.

Selection Guide

Choose nickel-bonded carbide when corrosion resistance is critical. For general wear applications without chemical exposure, standard cobalt-bonded carbide remains more economical.

Conclusion

Nickel-bonded carbide expands the range of applications where cemented carbide can be used. Its corrosion resistance ensures reliable performance in challenging chemical and marine environments.

References

GB/T 7714: GUPTA R, SONG J. Powder metallurgy processing and mechanical properties of cemented tungsten carbide composites[J]. International Journal of Refractory Metals and Hard Materials, 2020, 91: 105246.

APA 7th: Gupta, R., & Song, J. (2020). Powder metallurgy processing and mechanical properties of cemented tungsten carbide composites.

MLA 9th: Gupta, R., and J. Song. "Powder Metallurgy Processing and Mechanical Properties of Cemented Tungsten Carbide Composites."