Abstract
The production possibility of protective films of higher carboxylic (lauric, stearic (SA), oleic and linolenic) acids on a laser-textured surface of an aluminum alloy D16 is discussed. It is shown that such a modification leads to superhydrophobization (SHP) of the alloy surface. The most optimal type of laser processing has been determined: laser power is 12 W and the pass speed is 1000 mm / s. Profilometric measurements determined the average size of surface irregularities which is 6,47 microns. The degradation results of the SHP state in an aqueous solution of 0,05 M NaCl indicate greater stability of films formed from SA solutions. The protective ability of the coatings was evaluated by polarization measurements and corrosion tests in a salt chamber. It was found that films formed from an SA solution had the best anticorrosive properties. According to polarization measurements, an increase in ΔEpt = 220 mV, and the time of the first corrosion damage appears τcor = 384 h.
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