METHOD FOR OBTAINING PROTECTIVE POLYMER-CONTAINING COATINGS ON METALS AND ALLOYS Russian patent published in 2015 - IPC C25D11/00 C25D11/18 C25D13/06 

FIELD: chemistry.

SUBSTANCE: method includes plasma-electrolytic oxidation (PEO) of metal surface in electrolyte, containing soluble salts of organic and inorganic acids, with obtaining a layer of oxide ceramics and further application of polytetrafluoroethylene (PTFE) with thermal processing of obtained coating, with PEO being realised in bipolar mode, PTFE being applied by means of electrophoresis from its water dispersion, additionally containing sodium dodecylsulphate and OP-10 with the following content of components, g/l: PTFE with particle size not larger than 1 mcm 10-30, sodium dodecylsulphate 0.1-2.0, OP-10 0.1-2.0, and isopropyl alcohol in amount 5-100 ml/l and water - the remaining part, under voltage 40-300 V for 25-75 s, with thermal processing being realised at temperature 300-310°C for 10-15 minutes.

EFFECT: improved quality of applied coatings, increase of their wear- and corrosion resistance with simultaneous simplification of method and extension of range of processed metals.

4 cl, 6 ex, 2 dwg, 1 tbl