Diffusion of a Corroding Electrolyte through Defective Electroplated Ceria Based Coatings

S. Poupard; Fernando Pedraza-Diaz; J. Creus

doi:10.4028/www.scientific.net/DDF.289-292.235

Paper Titles

Hydrogen Embrittlement of High Strength Steels
p.203

Grain Boundary Diffusion of Fe in High-Purity Copper
p.211

Investigation of Phase Transformation of Forged Steel Cold Rolls due to Heat Affecting and Prevent its Failure
p.219

Diffusion Enhanced Rumpling Associated with Martensitic Transformation upon Cycling of Aluminide Bond-Coats
p.227

Diffusion of a Corroding Electrolyte through Defective Electroplated Ceria Based Coatings
p.235

Long Term Diffusion Studies in Fe Aluminide Coatings Deposited by Slurry Application on Ferritic Steel
p.243

Scanning Kelvin Probe Study on the Stability of the Steel/Coating Interfaces Contaminated by Soluble Salts
p.253

Diffusion Aluminide Coatings Using Spherical Micro-Sized Aluminium Particles
p.261

Numerical Determination of Intrinsic Diffusion Coefficient of Aluminide Coatings on Metals
p.269

HomeDefect and Diffusion ForumDefect and Diffusion Forum Vols. 289-292Diffusion of a Corroding Electrolyte through...

Diffusion of a Corroding Electrolyte through Defective Electroplated Ceria Based Coatings

Abstract:

Among the new environmentally friendly alternatives to improve the corrosion resistance of metallic substrates, cerium oxide based electrodeposited layers have raised particular attention. In this work, various electrodeposited layers on zinc substrate have been elaborated at different conditions to produce tailored compositions, microstructures and different degrees of porosity. The use of electrochemical techniques (polarisation resistance measurements, electrochemical impedance spectroscopy) has allowed to ascertain the porosity, which coupled to Scanning Electron Microscopy (FEG-SEM) and Energy Dispersive Spectrometry (EDS) studies along the cross sections have revealed the inward and/or outward diffusion of the different elements through the film till the metallic surface. The resulting corrosion mechanisms of these coatings immersed in 3% NaCl are finally discussed.