Esma AKCİ, BSc. Student
Metallurgy and Materials Engineering
Yıldız Technical University
Faculty of Chemistry - Metallurgy
Electrophoresis Ceramic Coatings
Electrophoretic deposition (EPD) is a colloidal process wherein bodies are coated directly from a
stable colloid suspension by DC electric field. It consists of two processes; the first one is electrophoresis that charged powder particles migrate towards the electrode. The second one is the
deposition that the powder particles deposit on the dense mass electrode. This coating technique is also known as electrodeposition, electrophoresis, E-coating and EPE in enameling industry. The aim of this study is the electrophoretic coating of metallic surfaces with advanced ceramic-based materials. The process route of the EPD is as follows. Firstly, the batch is prepared, during preparing batch, considering the effects of mill additives and oxides on coating is an important parameter.
Then, the particles are milled to gain the desired size (1-20 µm). After preparing suspension, the properties of suspension are tested. The substrate is dipped and the 2-50 Volts per inch voltage is applied to the electrodes. Due to the application of voltage, charged particles in the suspension move towards the electrode. After a certain time, the substrate is removed from the bath, dried, and then sintered at 800°C-850°C. During the experimental process, the thixotropy of the clays used in suspension was examined and the EPD voltage, current values will be determined.