Eletrodeposição de níquel aplicada à produção de ferramentas superabrasivas

Abstract

Superabrasive tools have been widely used in processes of modern material machining that are increasingly challenging. There are so many challenges that the superabrasive tools assume specific compositions designed exclusively for each of their purposes. Commonly these tools are classified according to the type of binder used for superabrasive grains agglutination. Superabrasive tools that use a metal monolayer as a binding agent are called single-layer superabrasive tools. Its increasing application in the industrial production sector has shown its great promising aspect. One of the methodologies used to make the metallic monolayer is nickel electroplating. In this context, the present work brings a detailed chemical approach to the steps that constitute the production chain of a single-layer superabrasive tool based on this methodology. It explores the richness of the chemical nature when considering the aspects involved, from the preparation of the base body to obtaining the finished product. It discourses regarding the importance of cleaning to promote good adhesion of electrodeposits. It highlights the phenomenon of electrolysis for the achievement of nickel electroplating, discussing the composition of the electrolyte solution and the operating parameters. In general, it exposes the different performances of nickel electrodeposits and their respective relevances throughout the production process, which can be mentioned: protection of the part surface, superabrasive grains agglutination, and a bright finish.