METHOD OF COATING FROM GOLD AND ITS ALLOYS ON METALLIC PARTS AND COMPOSITIONS OF INGREDIENTS FOR METHOD IMPLEMENTATION Russian patent published in 2010 - IPC C23C18/18 C23C18/42 

FIELD: metallurgy.

SUBSTANCE: inventions relate to field of coating from gold and its alloys on metallic details without current application with usage of compositions, not containing cyanides and other noxious reactants. Method includes defatting, chemical etching, activation, washing and treatment of prepared details by composition for coating. Activation of details is implemented by treatment by composition, containing, wt %: chloroaurate hydrogen acid 0.1-0.3, silver chloride 0.05-0.2, cobalt chloride 0.1-0.3, sal ammoniac 0.1-0.5, propylene carbonate 5-22, dimethyl sulfoxide - the rest, at temperature 70-90 °C during 30-90 seconds, and coating is implemented by treatment of prepared details by composition, containing, wt %: gold halogenide or chloroaurate hydrogen acid, in accounting to metal 0.1-0.5, sal ammoniac 0.2-1.0, boric acid 0.1-1.5, sodium nitrite 0.1-0.5, and/or cobalt chloride 0.1-1.0, and/or metal chloride, forming alloy with gold 0.1-2.0, propylene carbonate 5-22, dimethyl sulfoxide - the rest. Additionally details during the activation process and coating is joggled at a rate 60-90 oscillations per minute.

EFFECT: invention provides creation of reliable and ergonomic method of coating from gold and its alloys on metallic details with ability of detail surface activation, including with sublayer of chemical nickel, composition, accelerating process of growing of gold coating with possible intensification of process at ecologically friendly no-current gilding of details of complex shape, including allowing sublayer of chemical nickel, with receiving of coating of thickness up to 1,5 mcm.

3 cl, 1 tbl, 9 ex