The failures of engineering materials from corrosion, oxidation, friction, abrasion and fatigue are commonly initiated in the surface, and therefore the composition and microstructure of this region is of relevance in obtaining the final desired properties such as resistance to abrasion, wear and corrosion. Different systems require different types of surface protection and in this project we study Fe-based amorphous coatings to be used on pipes of interest in the chemical industry, where the desirable properties are high resistance to abrasion, to wear and to corrosion. In this context, the objective of the present project is the production of metallic coatings with excellent characteristics of resistance to corrosion and wear, using easy glass former alloys of the Fe-Cr-Nb-B system and the processes of HVOF and cold spray. To achieve this objective, a detailed evaluation of the alloys already studied in our group will be carried out, to optimized the compositions according to the desired properties, and the coatings produced by thermal spray will be characterized in terms of the structure and microstructure, and the mechanical and electrochemical properties.
News published in Agência FAPESP Newsletter about the scholarship: