METHOD OF ELECTROCHEMICAL POLISHING OF ARTICLES FROM SILVER AND ITS ALLOYS Russian patent published in 1998 - IPC

Abstract RU 2117718 C1

FIELD: jewelry industry; may be used in restoration works or in precision instrumentation engineering and mechanical engineering. SUBSTANCE: method includes anode treatment with pulse current including dissolving of silver articles in aqueous solutions containing salts of hydrocyanic acid. In this case, pulse current of relatively high frequency within the range of 0.1-10.0 Hz is modulated by pulses of relatively low frequency within the range of 0.01-0.10 Hz. Pulses applied to bath are of rectangular shape and their relative pulse duration is determined by bath impedance and is within 1.0-10.0. As a result, passivating film is removed and surface finish is attained equalling Ra = 0.16 with uniform luster and arbitrary article configuration. EFFECT: higher efficiency. 2 tbl

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RU 2 117 718 C1

Authors

Mirzoev R.A.

Styrov M.I.

Stepanova N.I.

Alekseev Ju.B.

Alikberova N.S.

Dates

1998-08-20Published

1996-09-25Filed