A method for the electrodeposition of tungsten alloys

The present invention discloses a method for the electrodeposition of tungsten alloys. The method of the boric acid solution is first prepared, and then added sodium tungstate, cobalt sulfate, nickel sulfate, cobalt and dissolved with stirring to form a tungsten nickel ion molar concentration ratio of 3: 1: 1 salt solution; followed by the addition of citric acid and succinic compound complexing agent acid, the molar concentration ratio of 3: 1; final addition of sodium lauryl sulfate solution, stirred well; final amount of citric acid in the electrolytic solution 58 ~ 116g / L, a wetting agent is sodium lauryl sulfate used in an amount of 0.1g / L, sodium tungstate in an amount of 30 ~ 99g / L, an amount of boric acid 4 ~ 6g / L; constant current electrically depositing tungsten alloy, stainless steel cathode plate, an anode plate double graphite; cathanode placed parallel cell , the electrolysis time is 1 ~ 5h, the electrolysis temperature is 40 ~ 80 ℃, a current density of 500 ~ 750mA / dm2, pH 5 to 7. Electrolytic solution of the present invention is stable, amorphous tungsten alloy plating layer can be obtained, a dense smooth surface, plating hardness is strong.