METHOD OF ELECTROLYTIC DEPOSITING OF SILICATE COATINGS ON ALUMINUM ALLOYS Russian patent published in 1996 - IPC

FIELD: galvanostegy, method is used for application of protective heat-and-wear-resistant depositions on aluminum alloys. SUBSTANCE: aim is to increase quality of depositing on alloys of aluminum with heterogeneous structure. For the purpose process of electrolytic depositing of silicate coatings in alkaline electrolyte is carried out with alternation of series of 2 - 50 positive half-periods of voltage with amplitude of 100 - 1000 V and of 2 - 150 negative half-periods with amplitude of 50 - 500 V observing ratio of cathodic and anodic half-periods number in limits from 3 to 1,5 in before sparking stage and uniformly decreasing it to 1.5 - 0.5 V in arc stage. EFFECT: increased quality of depositing on alloys of aluminum.