Abstract
In the paper, protective coatings on titanium were obtained by an electrochemical method using electrolytes based on ethylene glycol, glycerin, ammonium fluoride, and sodium silicate. The surface morphology was studied by metallographic and scanning probe microscopy (SPM), the nature of the coatings obtained was proved by infrared spectroscopy (IR-) and Raman spectroscopy (RS-). The surface morphology of the original sample is a set of grooves (distance 10-140 µm according to SPM and metallography). After electrochemical treatment, the surface mor-phology changed: a system of pores up to 30 nm in size was formed for the electrolyte based on gly-cerol and a developed amorphous surface consisting of globules, pores 500 nm and 250 nm in size for electrolytes based on ethylene glycol and ammonium fluoride, respectively. After electrolysis in sodium silicate solutions, a coating is formed whose elements are globules sized from 40 to 200 nm, combined into elongated ones. Analysis of the IR and Raman spectra showed the formation of a film of titanium oxide (rutile modification) and titanosilicate (titanite type).
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