FIELD: chemistry.
SUBSTANCE: galvanoplastic method involves using moulds made from aluminium or alloys thereof and galvanic deposition of nickel onto the mould with subsequent removal thereof, wherein before depositing nickel, the surface of the mould made from aluminium or alloys thereof is chemically passivated in 35-40 g/l ammonium persulphate solution and 25-30 g/l boric acid at temperature of 18-25°C for 1 minute.
EFFECT: obtaining a dense, light galvanic nickel coating of high purity class on moulds made from aluminium and alloys thereof.
1 dwg, 1 ex
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