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Colloidal silica coatings were deposited on copper substrates and their structural properties and corrosion resistance to a saline solution were studied. Optacol colloidal silica was used as primary reactive. Coatings were obtained by immersion and withdrawal speed was 2.1 mm/s. They were dried at 100 o C during 15 min and given a heat treatment at 180 o C for 30 min. X-ray diffraction...
SiO 2 amorphous thin films containing two different concentrations of copper-based colloidal particles were prepared by the sol-gel method. Thermal treatments in air at 350 o C result in the segregation of cupric oxide particles. Subsequent reducing treatments in a CO atmosphere at 300 and 500 o C for one hour partially reduces the cupric oxide into particles with metallic...
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