Electrophoretic Deposition of Aqueous Nano-Cr2O3 Suspension

The coating of nano-Cr 2 O 3 was successfully fabricated via aqueous electrophoretic deposition (EPD). The deposition behavior aqueous nano-Cr 2 O 3 suspension was affected by the added amount of nitric acid. The morphology of electrophoretic Cr 2 O 3 coating was significantly influenced by the deposition voltage. For a suitable EPD, stable aqueous nano-Cr 2 O 3 suspension could be obtained by the addition of 0.0025 M nitric acid, and the suitable deposition voltage was 5 V. For the purpose of increasing deposition rate which was limited by lower deposition voltage, it was suggested to employ higher suspension concentration of Cr 2 O 3 .