Cerium oxide films electrodeposition

Li, F.B., Newman, R.C., and Thompson, G.E., In situ atomic force microscopy studies of electrodeposition mechanism of cerium oxide films Nucleation and growth out of a gel mass precursor. Electrochimica Acta, 1997. 42(16) 2455-2464. 

Figure 2. Optical Micrograph of an electrodeposited cerium oxide film on stainless steel. 800x magnification, (from T.

Wang AQ, Golden TD. Electrodeposition of oriented cerium oxide films. Int. J. Elec-trochem. 2013 482187 1-10. DOT 10.1155/2013/482187. 

Li F, Thompson GE, Newman RC. Force modulation atomic force microscopy background, development and application to electrodeposited cerium oxide films. Appl. Surf. Sci. 1998 126 21-33. DOI 10.1016/50169-4332(97)00590-4. 

Yang L, Pang X, Fox-Rabinovich G, Veldhuis S, Zhitomirsky I. Electrodeposition of cerium oxide films and composites. Surf. Coat. Technol. 2011 206 1-7. DOI 10.1016/ j.surfcoat.2011.06.029. 

The electrodeposition of cerium oxide has an approximate linear relationship with fixed current density and deposition time up to a point. T3rpically, the faradaic peld drops off 35% after a certain film thickness due to the insulating quality of the cerium oxide coating [73]. After long periods of deposition time ( 24 hrs), the current becomes negligible. [27, 28]. 

A major thrust in recent years has been to electrodeposit cerium oxide onto various substrates for corrosion protection. Successful deposition of cerium oxide has been accomplished on surfaces such steels [77-79], zinc [15,80], aluminum [81], and nickel superaUoys [82,83]. Linear polarization and tafel analysis were applied to test the corrosion protection effect of the as-deposited cerium oxide-oriented films [1]. The corrosion current decreased from 7.94 x 10 for the substrate to 7.59 x 10 A cm for the Ce02 film coated substrate in a 0.1 M NaCl solution. Film coated substrate in a 0.1 M NaCl increased from 2.63 x lO for the substrate to 6.69 x 10 0 cm for the Ce02 film showing increased corrosion protection for the coating. 

Hamlaoui Y, Pedraza F, Tifouti L. Investigation of electrodeposited cerium oxide based films on carbon steel and of the induced formation of carbonated green rusts. Corros. Sd. 2008 50 2182-2188. DOI 10.1016/j.corsci.2008.05.017. 

Kulp, E. A., S. J. Limmer, E. W. Bohannan, and J. A. Switzer. 2007. Electrodeposition of nanometer-thick ceria films by oxidation of cerium(IIt)-acetate. Solid State Ionics 178 749-757. 

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