Aspersão térmica de um esmalte porcelânico a base de oxido de silício sobre um substrato de ferro fundido

Abstract

Study of thermal spraying of a silicon oxide-based porcelain enamel on a gray cast iron substrate. Course Conclusion Work Theme – Mechanical Engineering, Federal Technological University of Paraná, Pato Branco campus, Pato Branco 2023. The work in question concerns the application by thermal spraying of a porcelain enamel onto a gray cast iron piece. These thermal spraying methods are applied to various types of metallic alloys to protect the surface against corrosion, protection against high temperatures, among others. Therefore, they are used in cast iron alloys to prevent corrosion of the material as treated in this work. The justification for application by spraying is the replacement of the conventional method used by a certain company that uses electrostatic painting with porcelain enamel, which generates a high cost of time and consumables. In the case of application by a spraying method, some of these problems can be healed. The main purpose of this work is to study the deposition of silicon oxide-based porcelain enamel on a gray cast iron substrate by thermal spraying. The powder flame, plasma and HVOF processes were used in order to verify the best process for deposition of the enamel on the cast iron to have good adhesion and adequate thickness. It can be highlighted that the plasma and HVOF spraying methods proved to be more effective, presenting a good layer of deposit and an adequate level of adhesion, thus proving to be the methods with the greatest potential for deposition and burning.