A kind of surface treatment method of aluminum products before painting
A technology for surface treatment and aluminum products, applied in the direction of surface pretreatment, device for coating liquid on the surface, coating, etc., can solve limited problems, achieve simple wastewater treatment, good wear resistance, and good wear resistance. Effect
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Embodiment 1
[0038] (1) Preparation of cyanide-free zinc dipping solution:
[0039] ① Dissolve zinc sulfate, ferric chloride, sodium hydroxide, potassium pyrophosphate, triethanolamine, EDTA disodium, BOZ, ALS and SP with deionized water to obtain a cylinder opener; wherein the concentration of each component is Zinc ion 40g / L, iron ion 1g / L, sodium hydroxide 150g / L, potassium pyrophosphate 100g / L, triethanolamine 10g / L, disodium EDTA 3g / L, BOZ0.1g / L, ALS1.85g / L , SP0.05g / L.
[0040] ② The tank starter is 300ml / L, and the rest is deionized water to obtain a cyanide-free zinc dipping solution.
[0041] (2) Coating aluminum products with the cyanide-free zinc dipping solution prepared above, the steps are:
[0042] Grinding→Washing→Zincing→Washing→Etching→Washing→Anodizing→Washing→Coating and subsequent processes; the washing steps are all washed with deionized water;
[0043] ① Grinding: Use two 3M nylon roller brushes to grind the workpiece made of aluminum plate. The rotation speed of ...
Embodiment 2
[0049] (1) Preparation of cyanide-free zinc dipping solution:
[0050] ① Dissolve zinc oxide, ferric sulfate, cobalt acetate, sodium hydroxide, HEDP, monoethanolamine, tetraethylenepentamine, DEP, PS and MESS with deionized water to obtain a cylinder opener; the concentration of each component is 20g of zinc ion / L, iron ion 0.05g / L, cobalt ion 1g / L, sodium hydroxide 80g / L, HEDP50g / L, monoethanolamine 20g / L, tetraethylenepentamine 5g / L, DEP1g / L, PS0.2g / L , MESS0.05g / L.
[0051] ② The potting agent is 500ml / L, and the rest is deionized water to obtain a cyanide-free zinc dipping solution.
[0052] (2) Coating aluminum products with the cyanide-free zinc dipping solution prepared above, the steps are:
[0053] Grinding→Washing→Zincing→Washing→Etching→Washing→Anodizing→Washing→Coating and subsequent processes; the washing steps are all washed with deionized water;
[0054] ① Grinding: Use three 3M nylon roller brushes to grind the workpiece made of aluminum plate. The rotation...
Embodiment 3
[0060] (1) Preparation of cyanide-free zinc dipping solution:
[0061] ① Dissolve zinc chloride, nickel acetate, cuprous chloride, ferric nitrate, ATMP, potassium pyrophosphate, nitrilotriacetic acid, diethanolamine, PPS-OH, PA, IZEC and TPS with deionized water to obtain a cylinder opener; The concentration of each component is zinc ion 30g / L, nickel ion 6g / L, copper ion 0.001g / L, iron ion 0.5g / L, potassium hydroxide 160g / L, ATMP50g / L, potassium pyrophosphate 30g / L, Nitrilotriacetic acid 20g / L, diethanolamine 10g / L, PPS-OH0.5g / L, PA0.2g / L, IZEC0.05g / L, TPS0.08g / L;
[0062] ② The potting agent is 400ml / L, and the rest is deionized water to obtain a cyanide-free zinc dipping solution.
[0063] (2) Coating aluminum products with the cyanide-free zinc dipping solution prepared above, the steps are:
[0064] Grinding→Washing→Zincing→Washing→Etching→Washing→Anodizing→Washing→Coating and subsequent processes; the washing steps are all washed with deionized water;
[0065] 1. grin...
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