Protection of Metals and Physical Chemistry of Surfaces · 2019 · 13 citations · 35 references
Natural SciencesMaterials EngineeringMaterials ScienceCorrosion ScienceMaterials ChemistrySurface ScienceCoatingsCorrosion EngineeringCorrosion ResistanceCorrosion-resistant MaterialsMetal Oxide NanomaterialsMetal OxidesAluminaAlumina NanoparticlesAlumina Thin FilmsAluminum Alloy CorrosionAluminum CorrosionAluminum Oxide NanomaterialsCorrosion Of Aluminum AlloysSol-gel Processing
Abstract Dense alumina coatings were fabricated over aluminum alloy via dip coating method using oxime-modified aluminum(III) isopropoxide as a sol–gel precursor. The influence of important dip coating parameter; withdrawal rates on quality, thickness, uniformity and corrosion resistivity of coatings were investigated. Structural characterization of coated substrates were done by X-ray diffraction patterns (XRD), scanning electron microscopy (SEM) and atomic force microscopy studies (AFM). Corrosion tests by electrochemical studies indicated that corrosion resistive alumina coatings can be achieved by using withdrawal rate of 25 mm min–1 and 04 cycles of coatings in 3.5% aqueous NaCl solution.
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