Effect of adding ceramic powder on the microstructure, wear and corrosion resistance of NiCrBSi/WC coating

Abstract

The present study envisaged the preparation of four kinds of coatings on 45# steel substrate by using the Supersonic plasma spraying (SPS) technology. The structure and morphology of the four coatings were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), and the hardness, wear resistance and corrosion resistance of the coatings were studied. The results show that there was an increase in the ceramic particles. The wear resistance and corrosion performance of the coatings was improved to some extent. The hardness of N6WA decreased with an increase in the coating distance, but it showed good wear resistance. The wear mechanism was found to involve mainly the abrasive wear. A series of electrochemical tests were carried out in 3.5 wt.% NaCl solution, and the corrosion behavior and corrosion resistance mechanism were studied.

Keywords

• PS
• Ceramic coating
• Hardness
• Wear resistance
• Corrosion performance