FIELD: performing operations.
SUBSTANCE: invention relates to surface treatment of articles from aluminium alloys and can be used in machine building and related industries. Articles made from aluminium alloys are subjected to microarc oxidation in a solution containing potassium hydroxide 3-5 g/l, sodium silicate 10-20 g/l and vanadium oxide 3-5 g/l, in anodic-cathodic mode at current density 3.5-15.0 A/dm2 for 3-35 minutes.
EFFECT: obtaining homogeneous uniform coatings of stable black colour with absorption coefficient of 93-96 % on articles from aluminium alloys.
1 cl, 4 ex
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