Article ID Journal Published Year Pages File Type
8027366 Surface and Coatings Technology 2014 33 Pages PDF
Abstract
The influence of electric fields at different temperatures on the anodic oxide layer growth was studied on AA 5083. Barrier-type alumina layers showed a fair morphology with multiform pores. The diameter of dominating pores performed a transversal amplification from barrier-type layer to pore structure. The pore cells were perpendicular with column constriction near the second-phase particles and parallel with the layer growth. Both the barrier-type oxide layer and porous oxide layer perform excellent corrosion protection on aluminium substrate with the corrosion current density of 10− 10 A/cm2 and transfer impedance of 107 Ω cm2. The former leads to the more effective anti-corrosion property.
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Physical Sciences and Engineering Materials Science Nanotechnology
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