Production of protective coatings on metallic surfaces, especially anti-corrosion coatings, involves hydrolysis and polycondensation of coating compositions based on hydrolyzable silane compounds

摘要

Protective organic-inorganic coatings are produced on metallic substrates by the hydrolysis and polycondensation of coating compositions containing (a) silanes with hydrolyzable groups or hydroxyl groups and optionally with non-hydrolyzable groups and (b) other compounds. A method for the production of protective organic-inorganic coatings on metallic substrates involves using a coating composition based on the hydrolysis and polycondensation of silane(s) of formula RnSiX4-n (I) or their oligomers, plus one or more other compounds, in which X : hydrolyzable groups or hydroxyl groups; R : non-hydrolyzable groups; and n : 0, 1 or 2.