Effect of the Electrolytic Solution Composition on Properties of Ceramic Coatings on Ti Produced by PEO
Ceramic oxide coatings were produced on pure titanium by plasma electrolytic oxidation in different electrolytes. The variation of coating thickness with applied voltages revealed coating almost kept a steady-state growth rate in electrolyte A and B, but not for electrolyte C. Numerous nodules occurred on the surface of the coatings at 200V in electrolyte A and B, and then nodules disappeared with the applied voltage increasing to 300V. There was no nodules occurred, and pore size was evidently different in electrolyte C. When the applied voltage was 300V, the coating formed in electrolyte C exhibited the highest corrosion potential and lowest corrosion current density in 3.5% NaCl aqueous solution.
Yongbo Shao, Shuguang Hao, Yuping Luo, Jibo Xing and Zhiyong Liu
P. Y. Guo et al., "Effect of the Electrolytic Solution Composition on Properties of Ceramic Coatings on Ti Produced by PEO", Applied Mechanics and Materials, Vols. 174-177, pp. 596-599, 2012