A kind of bright alkaline cyanide-free galvanizing electroplating solution and preparation method thereof
An electroplating solution and alkaline technology, which is applied in the field of bright alkaline cyanide-free galvanizing electroplating solution and its preparation, can solve problems such as difficult wastewater treatment, achieve good dispersing ability and covering ability, improve brightness, and simplify maintenance
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Embodiment 1
[0033] The present embodiment provides the preparation method of additive A:
[0034] Take the preparation of 1L additive A as an example, measure softener 100-500mL, brightener 100-300mL, auxiliary brightener 10-100mL, thickener 5-15g, add deionized water to 1L.
[0035] Among them, the preparation steps of the softener: in the reactor, add triethylenetetramine 1-2moL, piperazine 0.5-1.5moL, 2, 4, 6 trimethylaniline 0.3-1.5moL, acetamide 0.8-1.5moL, Polyacrylamide 0.5-1.5moL, heat up to 60°C, slowly drop epichlorohydrin 1-4moL, after dripping epichlorohydrin, heat up to 90°C, react for 12 hours, cool, recover, and obtain softener.
[0036] Wherein, the brightener is sodium 1-picoline-3-formate.
[0037] Among them, the preparation steps of the auxiliary brightener: In the reactor, add 1.2moL of imidazole, raise the temperature to 45°C, slowly add epichlorohydrin to 1moL, after the dripping of epichlorohydrin, raise the temperature to 85°C, and react for 12 Hours, cooling, r...
Embodiment 2
[0040] The present embodiment provides the preparation method of additive B:
[0041] Take the preparation of 1L additive B as an example, accurately weigh 100-400g of fructose and 200-500g of glucose, add deionized water to 1L, mix and stir evenly.
Embodiment 3
[0043] The preparation steps for preparing the bright type alkaline cyanide-free galvanizing electroplating solution of the present embodiment are as follows:
[0044] (1) Accurately weigh 10g of zinc oxide and 100g of sodium hydroxide, add 250mL of deionized water to the beaker, pour the sodium hydroxide into the beaker and stir until it is completely dissolved, then mix the zinc oxide into a paste with a little deionized water, and stir while stirring Add to sodium hydroxide solution until completely dissolved, cool to room temperature, set aside;
[0045] (2) Add 4 mL of additive B to the solution prepared in step (1), then add 10 mL of additive A, add deionized water to 1 L, mix and stir evenly, and prepare a cyanide-free zinc plating solution.
[0046] The bright alkaline cyanide-free galvanizing solution prepared in this example is used for electroplating and performance tests. The test conditions are: current is 3A, temperature is 25°C, 500mL Hull Cell test, electroplat...
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Abstract
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