The Preparation and Properties of Thick Bronze Coating Using Friction-Assisted Jet Electrodeposition

Abstract

In this study, a novel friction-assisted jet electrodeposition technology was applied to prepare bronze coating on 40CrNiMoA structural steel surfaces. The bronze electrode was designed with internal flow channels and nozzles, and the friction brushes made of alumina and silicon carbide were connected to the electrode surface. It was reported that the quality and deposition rate of the thick bronze coatings were significantly improved with friction-assisted jet electrodeposition. The roughness and microstructures were refined, and the deposition rate was up to 100 μm/h when the current density was 8 A/dm2. In addition, the chemical composition was related to current density as the content of tin in the bronze coating made with FJED decreased at a high current density. Moreover, the grain structures were α-CuSn in the solid-solution phase and the average grain size of FJED coatings was refined at a current density of 8 A/dm2.