Nano-dispersion phase components - ratio influence onCr-SiO_2-C nano-composition coatings corrosion resistance

摘要

The report presents the results of experiments on introduction of nano-size par-ticles of silicon dioxide SiO_2 (5-50 nm) and lamp soot C (11-100 nm) into chromium coatings and investigation of corrosion resistance in 3% NaCl solution. Nano-composition electrolytic coatings were received at the various density of current: 2, 3, 4, 5, 6, 7 kА/m~2, temperature 303-343 K and nano-dispersion phase components’ ratio.rnThe microstructure was investigated by electron- and atom-force microscope be-fore and after corrosion tests. It was established, that nanostructured composition elec-trolytic coatings, which were obtained in electrolytes containing 18-14 g/dm~3 SiO_2 and 2-6 g/dm~3 C, have the highest corrosion resistance.