A method for preparing cucr electrical contact material by electrolytic chromium sintering on copper surface
An electrical contact material, electrolytic chromium technology, applied in the field of materials, can solve the problems of reducing production costs, shortening production time, etc., and achieve the effects of reducing production costs, convenient control, and shortening time
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Embodiment 1
[0046] 1. Copper mesh surface activation treatment
[0047]Select a 200-mesh copper mesh with a copper wire diameter of Ф0.24mm, put the copper mesh into the HCl solution with a concentration of 10wt% and corrode it for 5 minutes, wash it with distilled water after taking it out, then soak it in acetone solution for 1 minute, and use absorbent cotton after taking it out Wipe it clean, and then wash it with distilled water, the copper mesh can be used as the cathode for electrolytic adsorption of chromium;
[0048] 2. Electrolytic adsorption chromium treatment
[0049] The electrolyte composition is: chromic anhydride (CrO 3 ) 240g / L, sulfuric acid (H 2 SO 4 ) 2g / L, chromium mist inhibitor 0.1g; the anode material is lead plate, the cathode material is copper mesh, the area ratio of anode and cathode is 2:1; use a heating rod to heat the plating tank, and keep the temperature of the electrolyte in the plating tank at 60°C , pass current, keep cathode current density 60A / dm ...
Embodiment 2
[0056] 1. Copper wire surface activation treatment
[0057] Select a copper wire with a diameter of Ф0.1mm, put it into the HCl solution with a concentration of 30wt% to corrode for 1min, take it out, wash it with distilled water, then soak it in acetone solution for 5min, wipe it clean with absorbent cotton, and then wash it with distilled water, then Copper wire wrapped around an aluminum plate serves as a cathode for electrolytic adsorption of chromium;
[0058] 2. Electrolytic adsorption chromium treatment
[0059] The electrolyte composition is: chromic anhydride (CrO 3 ) 260g / L, sulfuric acid (H 2 SO 4 ) 2.2g / L, chromium mist inhibitor 1g; anode material is lead antimony plate, cathode material is copper wire wrapped on aluminum plate, anode and cathode area ratio is 1:3; use resistance heating rod to heat the plating tank to maintain electrolysis The temperature of the liquid is 30°C; the current is passed through and the cathode current density is kept at 30A / dm 2...
Embodiment 3
[0066] 1. Copper mesh surface activation treatment
[0067] Select a 20-mesh copper mesh with a copper wire diameter of Ф0.5mm, put the copper mesh into a 20wt% HCl solution to corrode for 3 minutes, take it out, wash it with distilled water, then soak it in acetone solution for 3 minutes, take it out and wipe it with absorbent cotton clean, and then rinsed with distilled water, it can be used as a cathode for electrolytic adsorption of chromium;
[0068] 2. Electrolytic adsorption chromium treatment
[0069] The electrolyte composition is: chromic anhydride (CrO 3 ) 250g / L, sulfuric acid (H 2 SO 4 ) 2.1g / L, chromium mist inhibitor 0.5g; the anode material is lead-tin plate, the cathode material is copper mesh, and the area ratio of anode and cathode is 3:1; use a heating rod to heat the plating tank and keep the electrolyte temperature at 45°C; Pass current, keep cathode current density 60A / dm 2 , after electroplating for 1h, the mass fraction of chromium in the copper m...
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