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Nano‐enamel: a new way to produce glass‐like protective coatings for metals
Author(s) -
Nguyen H. Q.,
Fürbeth W.,
Schütze M.
Publication year - 2002
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/1521-4176(200210)53:10<772::aid-maco772>3.0.co;2-#
Subject(s) - enamel paint , nano , materials science , composite material , metallurgy
Nanoparticles and nanostructured films have gained an increasing interest for industrial application in the last years. Based on chemical nanotechnology glass‐like protective coatings thermally processed at comparatively lower temperatures around 500°C were developed for metal substrates by two different ways. Starting from polymeric sols (suspension consisting of branched macromolecules) containing multicomponent oxide of the SiO 2 ‐B 2 O 3 ‐P 2 O 5 ‐Na 2 O system produced by hydrolysis and polycondensation of an alkoxide mixture under acidic condition, thin, hard, transparent, crack‐free and corrosion resistant coatings could be applied to aluminium and steel. Coatings from particulate sols (suspension consisting of solid particles) containing multicomponent oxide synthesized under basic condition by electrophoretic deposition (EPD) proved to be a promising method when very thick coatings are required. Both routes offer the potential of a new type of purely inorganic coatings for corrosion and abrasion protection.