Anti-corrosion and anti-tarnish process for copper alloy packing box
A technology for packaging boxes and copper alloys, which is applied in the coating process of metal materials, devices for coating liquid on the surface, coatings, etc., can solve the problems of corrosion and discoloration of packaging boxes, damage to the color of packaging boxes, etc., and achieve the purpose of inhibiting corrosion and discoloration Effect
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Embodiment 1
[0021] (a): Put the electrochemically polished copper alloy packaging box at 60 ℃, 4mol / L CrO 3 After soaking in the aqueous solution for 3 minutes, rinse and dry;
[0022] (b): Immerse the dried packaging box in 0.1 mol / L benzotriazole aqueous solution for 3 minutes, wash it with water, and then dry it in the air.
[0023] (c): Put the dried copper alloy packaging box at 63°C, 5mol / L CrO 3 After soaking in the aqueous solution for 5 minutes, then rinse and dry;
[0024] (d): Immerse the dried packaging box in 0.1mol / L benzotriazole aqueous solution for 3 minutes, wash it with water and then dry it in the air;
[0025] (e): Put the dried copper alloy package in 4mol / L of H 2 SO 4 Soak in the medium for a moment, then rinse it, and then soak it in 1% K2Cr2O7 for 2min;
[0026] (f): Coat the surface of the impregnated copper alloy packaging box with nitro-lacquer, bake it at 60°C for 10 minutes, and cool it indoors;
Embodiment 2
[0028] (a): Put the electrochemically polished copper alloy packaging box at 61°C, 4.5mol / L CrO 3 After soaking in the aqueous solution for 3.5 minutes, rinse and dry;
[0029] (b): Immerse the dried packaging box in 0.1 mol / L benzotriazole aqueous solution for 3.4 minutes, wash it with water, and then dry it in the air.
[0030] (c): Put the dried copper alloy packaging box at 64°C, 5.2mol / L CrO 3 After soaking in the aqueous solution for 5.2min, then rinse and dry;
[0031] (d): Immerse the dried packaging box in 0.1mol / L benzotriazole aqueous solution for 3.2min, wash it with water and then dry it in the air;
[0032] (e): put the dried copper alloy package in H 2 Immerse in O for a moment, then rinse it, and then immerse it in 1.2% K2Cr2O7 for 2.1min;
[0033] (f): Coat the surface of the impregnated copper alloy packaging box with metallic paint, bake it at 62°C for 12 minutes, and cool it indoors;
Embodiment 3
[0035] (a): Put the electrochemically polished copper alloy packaging box at 64°C, 4.5mol / L CrO 3 After soaking in the aqueous solution for 3.5 minutes, rinse and dry;
[0036] (b): Immerse the dried packaging box in 0.1 mol / L benzotriazole aqueous solution for 3.8 minutes, wash it with water, and then dry it in the air.
[0037] (c): Put the dried copper alloy packaging box at 66°C, 5.8mol / L CrO 3 After soaking in the aqueous solution for 5.8min, then rinse and dry;
[0038] (d): Immerse the dried packaging box in 0.1mol / L benzotriazole aqueous solution for 3.8min, wash it with water and then dry it in the air;
[0039] (e): the dried copper alloy package box in 4.8mol / L of H 2 SO 4 Soak in the medium for a moment, then rinse it, and then soak it in 1.9% K2Cr2O7 for 2.8min;
[0040] (f): Coat the surface of the impregnated copper alloy packaging box with nitro-lacquer or metallic paint, bake at 70°C for 20 minutes, and cool indoors;
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