FIELD: composite materials.
SUBSTANCE: invention relates to composite materials, namely to methods for obtainment of roughness on a surface of composite materials. Products of composite materials are placed in a discharge chamber with a gas-liquid medium at a distance between electrodes of 50-150 mm. In case of alternating current, voltage of 25-1000 V with a frequency of 50 Hz and discharge current of 0.05-8 A are supplied. In case of direct current, voltage of 20-1000 V and discharge current of 0.4-3 A are established. A discharge is ignited between electrodes, and processing is carried out for t≥1 s. Moreover, solutions of NaCl salt with concentration from 1% are used until the solution is saturated.
EFFECT: obtainment of roughness is provided, at which adhesive strength of composite materials is increased.
2 cl, 3 dwg
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