CN110684997B - Zinc-plating electroplating liquid and preparation method thereof - Google Patents
Zinc-plating electroplating liquid and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a galvanizing electroplating solution, which comprises the following components: 20-80 g/L of zinc chloride, 200-300 g/L of potassium chloride, 20-50 g/L of boric acid, 0.3-3 mL/L of main light agent and 20-35 mL/L of softening agent, wherein the main light agent can be prepared from aqueous solutions of a carrier and a brightening agent, and the softening agent is prepared from aqueous solutions of a dispersing agent and a dispersing agent. The galvanizing electroplating solution can improve the glossiness and the depth of a coating, simultaneously reduces organic impurities, reduces smell, reduces the difficulty of wastewater treatment, simplifies the maintenance operation of the plating solution and reduces the production cost.
Description
Technical Field
The invention belongs to the technical field of electroplating, and particularly relates to a zinc-plating electroplating solution and a preparation method thereof.
Background
Since the eighties of the last century, the potassium chloride galvanizing process has been more and more widely applied in production due to the advantages of high current efficiency, good coating brightness, easy treatment of heavy metal ions in wastewater, direct electroplating on various substrates and the like. However, in the traditional potassium chloride galvanizing process, a large amount of surfactants, cosolvents and the like are often used for improving the solubility of main light agent components, so that the problems that a plated coating is difficult to clean, a large amount of organic impurities exist, a passive film is poor in binding force and easy to discolor, the content of the surfactants in production wastewater is high, the amount of foams is large, the Chemical Oxygen Demand (COD) exceeds the standard, a production area is full of pungent odor and the like are caused. In addition, organic compounds used in a large amount in the brightener have a long degradation period and even cannot be degraded, and waste products and garbage generated generate great harm to the environment.
The main brightening agent for potassium chloride galvanization generally comprises three components of a main brightening agent, a carrier brightening agent and an auxiliary brightening agent. Among these components, the main brightener crystallizes the plating layer more finely and presents a bright appearance by changing the crystal structure; the carrier brightener is used for solubilizing the main brightener which is insoluble in water so as to uniformly disperse the main brightener into the plating solution, and can obviously improve the cathode polarization of the plating solution and ensure that the plating layer is crystallized and fine; the auxiliary brightener can make the bright area of the plating layer expand to the high and low current density areas in two directions, so that the brightness of the plating layer is further improved.
The conventional potassium chloride galvanizing brightener is divided into three generations according to the development periods of a main brightener and a carrier brightener. The first generation of carrier brightener totally adopts nonionic surfactants such as alkyl polyoxyethylene ether, alkylphenol polyoxyethylene ether, alkyl polyoxyethylene polyoxypropylene ether and the like; the second generation introduces anionic surfactant, and the cloud point of the plating solution is improved; the third generation changes the carrier brightener component to obtain a plating solution with reduced foam and reduced COD. However, the third generation of main brightening agents are all insoluble in water, and a large amount of surfactant is needed to be used for solubilization when the main brightening agents are used, so that the obtained coating has a large number of impurities and poor corrosion resistance, particularly, COD in wastewater is easy to exceed the standard, the odor is heavy, the burden is brought to wastewater treatment and environment, and the application in production is limited.
Disclosure of Invention
Based on the technical scheme, the invention provides the zinc plating electroplating solution which can improve the glossiness and the depth of a plated layer after plating, reduce the smell of the electroplating solution and reduce organic impurities.
The specific technical scheme is as follows:
a zinc plating electroplating solution comprising the components: 20-80 g/L of zinc chloride, 200-300 g/L of potassium chloride, 20-50 g/L of boric acid, 0.3-3 mL/L of main light agent and 20-35 mL/L of softening agent, wherein the main light agent can be prepared from aqueous solutions of a carrier and a brightening agent, and the softening agent is prepared from aqueous solutions of a dispersing agent and a dispersing agent.
In one embodiment, the composition comprises the following components: 40-60 g/L of zinc chloride, 220-250 g/L of potassium chloride, 30-35 g/L of boric acid, 0.5-2 mL/L of main light agent and 25-30 mL/L of softening agent.
In one embodiment, the concentration of the carrier in the aqueous solution is 10 g/L-20 g/L, and the concentration of the brightener in the aqueous solution is 80 g/L-120 g/L.
In one embodiment, the carrier is sodium nonylphenol polyoxyethylene ether sulfonate; and/or the presence of a gas in the gas,
the brightener is methoxy o-chlorobenzaldehyde.
In one embodiment, the concentration of the dispersing agent in the aqueous solution is 20 g/L-40 g/L, and the concentration of the dispersing agent in the aqueous solution is 160 g/L-200 g/L.
In one embodiment, the dispersant is 2-naphthalene sulfonic acid formaldehyde polymer sodium salt; and/or the presence of a gas in the gas,
the dispersing agent is a mixture of sodium benzoate and sodium sulfonate.
The invention also provides a preparation method of the galvanizing electroplating solution.
The specific technical scheme is as follows:
a preparation method of a galvanizing plating solution comprises the following steps:
(1) preparation of the brightener solution: dissolving brightener in water, adding carrier, stirring and dissolving to obtain main brightener solution;
(2) preparation of softener solution: dissolving a dispersing agent in water, adding a dispersing agent, and stirring for dissolving to obtain a softening agent solution;
(3) preparing a plating solution: adding zinc chloride and boric acid into water, heating and stirring to dissolve, adding potassium chloride, dissolving, standing and cooling; adding zinc powder and active peptide for treatment, filtering, taking filtrate, and adding the main light agent solution obtained in the step (1) and the softening agent solution obtained in the step (2) to obtain the plating solution.
In one embodiment, the heating temperature in step (3) is 50 ℃ to 70 ℃.
In one embodiment, the amount of the zinc powder in the step (3) is 1 g/L; and/or the presence of a gas in the gas,
the dosage of the active peptide is 1 g/L.
In one embodiment, the processing time of the zinc powder and the active peptide in the step (3) is 0.5-1.5 hours.
The zinc plating electroplating solution and the preparation method thereof have the following advantages and beneficial effects:
the inventor of the invention discovers through a great deal of creative experimental research that organic cosolvents such as alcohols and the like are not used in the main brightener of the prepared galvanizing electroplating solution, meanwhile, the brightener which is easy to dissolve in water is used, the using amount of carrier substances can be reduced, the obtained electroplating solution can provide higher glossiness of a coating, meanwhile, the softener added into the electroplating solution effectively improves the depth of the coating, and the main brightener and the softener are used together to effectively promote the effect of enhancing the glossiness of the main brightener.
The zinc plating solution prepared by the invention reduces organic impurities, reduces odor, reduces the difficulty of wastewater treatment, simplifies the maintenance operation of the plating solution and reduces the production cost.
Detailed Description
In order that the invention may be more fully understood, reference will now be made to the accompanying examples. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The invention provides a galvanizing electroplating solution, which comprises the following components: 20-80 g/L of zinc chloride, 200-300 g/L of potassium chloride, 20-50 g/L of boric acid, 0.3-3 mL/L of main light agent and 20-35 mL/L of softening agent, wherein the main light agent can be prepared from aqueous solutions of a carrier and a brightening agent, and the softening agent is prepared from aqueous solutions of a dispersing agent and a dispersing agent.
In one particular example, the composition comprises the following components: 40-60 g/L of zinc chloride, 220-250 g/L of potassium chloride, 30-35 g/L of boric acid, 0.5-2 mL/L of main light agent and 25-30 mL/L of softening agent.
In a specific example, the concentration of the carrier in the aqueous solution is 10 g/L-20 g/L, and the concentration of the brightener in the aqueous solution is 80 g/L-120 g/L.
In one specific example, the carrier is preferably sodium nonylphenol polyoxyethylene ether sulfonate and the brightener is preferably methoxy o-chlorobenzaldehyde. The methoxy o-chlorobenzaldehyde is easy to dissolve in water, so that the dosage of a carrier in a main photosensitizer is further reduced, the smell of the plating solution is reduced, the difficulty of wastewater treatment is reduced, and the brightness of a plating layer is further improved.
In a specific example, the concentration of the dispersing agent in the aqueous solution is 20 g/L-40 g/L, and the concentration of the dispersing agent in the aqueous solution is 160 g/L-200 g/L.
Further, the dispersing agent is preferably 2-naphthalene sulfonic acid formaldehyde polymer sodium salt, and the dispersing agent is a mixture of sodium benzoate and sulfonic acid sodium salt.
The invention also provides a preparation method of the galvanizing electroplating solution, which comprises the following steps:
(1) preparation of the brightener solution: dissolving the brightener methoxy o-chlorobenzaldehyde in water, adding the carrier sodium nonylphenol polyoxyethylene ether sulfonate, and stirring to dissolve to obtain a main brightener solution;
(2) preparation of softener solution: dissolving 2-naphthalene sulfonic acid formaldehyde polymer sodium salt in water, adding sodium benzoate and sulfonic acid sodium salt, stirring and dissolving to obtain a softening agent solution;
(3) preparing a plating solution: adding zinc chloride and boric acid into water, heating and stirring to dissolve, adding potassium chloride, dissolving, standing and cooling; adding zinc powder and active peptide for treatment, filtering, taking filtrate, and adding the main light agent solution obtained in the step (1) and the softening agent solution obtained in the step (2) to obtain the plating solution.
In one specific example, the heating temperature in step (3) is 50 ℃ to 70 ℃.
In a specific example, the amount of zinc powder used in step (3) is 1 g/L.
In one embodiment, the amount of active peptide used in step (3) is 1 g/L.
In a specific example, the processing time of the zinc powder and the active peptide in the step (3) is 0.5-1.5 hours.
In the following examples, all the starting materials were commercially available unless otherwise specified.
The unit mL/L represents the amount of solution added in milliliters per liter of solvent or solution.
Example 1
A preparation method of a galvanizing plating solution comprises the following steps:
1. preparation of the brightener solution
Dissolving 100g of methoxy o-chlorobenzaldehyde in 500mL of water, adding 15g of sodium nonylphenol polyoxyethylene ether sulfonate, stirring for dissolving, and adding water to 1000mL to obtain a main light agent solution for later use.
2. Preparation of softener solution
Dissolving 30g of 2-naphthalenesulfonic acid formaldehyde polymer sodium salt in 500mL of water, adding 120g of sodium benzoate and 60g of sulfonic acid sodium salt, stirring until solid substances are completely dissolved, and adding water to 1000mL to obtain a softener solution for later use.
3. Preparation of plating solutions
Adding 80g of zinc chloride and 50g of boric acid into 500mL of water, heating to 60 ℃, stirring to dissolve the zinc chloride and the boric acid, adding 300g of potassium chloride, adding water to 900mL, standing and cooling; adding 1g of zinc powder and 1g of activated carbon for treatment for one hour, then filtering to obtain a clean filtrate, adding 2.5mL of the main light agent prepared in the step 1 and 35mL of the softening agent prepared in the step 2 into the filtrate, and then adding water to 1000mL to obtain the galvanizing electroplating solution.
Example 2
A preparation method of a galvanizing plating solution comprises the following steps:
1. preparation of the brightener solution
Dissolving 100g of methoxy o-chlorobenzaldehyde in 500mL of water, adding 15g of sodium nonylphenol polyoxyethylene ether sulfonate, stirring for dissolving, and adding water to 1000mL to obtain a main light agent solution for later use.
2. Preparation of softener solution
Dissolving 30g of 2-naphthalenesulfonic acid formaldehyde polymer sodium salt in 500mL of water, adding 120g of sodium benzoate and 60g of sulfonic acid sodium salt, stirring until solid substances are completely dissolved, and adding water to 1000mL to obtain a softener solution for later use.
3. Preparation of plating solutions
Adding 60g of zinc chloride and 30g of boric acid into 500mL of water, heating to 60 ℃, stirring to dissolve the zinc chloride and the boric acid, adding 250g of potassium chloride, adding water to 900mL, standing and cooling; adding 1g of zinc powder and 1g of activated carbon for treatment for one hour, then filtering to obtain a clean filtrate, adding 1mL of the main brightening agent prepared in the step 1 and 30mL of the softening agent prepared in the step 2 into the filtrate, and then adding water to 1000mL to obtain the galvanizing electroplating solution.
Example 3
A preparation method of a galvanizing plating solution comprises the following steps:
1. preparation of the brightener solution
Dissolving 100g of methoxy o-chlorobenzaldehyde in 500mL of water, adding 15g of sodium nonylphenol polyoxyethylene ether sulfonate, stirring for dissolving, and adding water to 1000mL to obtain a main light agent solution for later use.
2. Preparation of softener solution
Dissolving 30g of 2-naphthalenesulfonic acid formaldehyde polymer sodium salt in 500mL of water, adding 120g of sodium benzoate and 60g of sulfonic acid sodium salt, stirring until solid substances are completely dissolved, and adding water to 1000mL to obtain a softener solution for later use.
3. Preparation of plating solutions
Adding 40g of zinc chloride and 30g of boric acid into 500mL of water, heating to 60 ℃, stirring to dissolve the zinc chloride and the boric acid, adding 250g of potassium chloride, adding water to 900mL, standing and cooling; adding 1g of zinc powder and 1g of activated carbon for treatment for one hour, then filtering to obtain a clean filtrate, adding 1mL of the main brightening agent prepared in the step 1 and 30mL of the softening agent prepared in the step 2 into the filtrate, and then adding water to 1000mL to obtain the galvanizing electroplating solution.
Example 4
A preparation method of a galvanizing plating solution comprises the following steps:
1. preparation of the brightener solution
Dissolving 100g of methoxy o-chlorobenzaldehyde in 500mL of water, adding 15g of sodium nonylphenol polyoxyethylene ether sulfonate, stirring for dissolving, and adding water to 1000mL to obtain a main light agent solution for later use.
2. Preparation of softener solution
Dissolving 30g of 2-naphthalenesulfonic acid formaldehyde polymer sodium salt in 500mL of water, adding 120g of sodium benzoate and 60g of sulfonic acid sodium salt, stirring until solid substances are completely dissolved, and adding water to 1000mL to obtain a softener solution for later use.
3. Preparation of plating solutions
Adding 40g of zinc chloride and 35g of boric acid into 500mL of water, heating to 60 ℃, stirring to dissolve the zinc chloride and the boric acid, adding 220g of potassium chloride, adding water to 900mL, standing and cooling; adding 1g of zinc powder and 1g of activated carbon for treatment for one hour, then filtering to obtain a clean filtrate, adding 1mL of the main brightening agent prepared in the step 1 and 30mL of the softening agent prepared in the step 2 into the filtrate, and then adding water to 1000mL to obtain the galvanizing electroplating solution.
Example 5
A preparation method of a galvanizing plating solution comprises the following steps:
1. preparation of the brightener solution
Dissolving 100g of methoxy o-chlorobenzaldehyde in 500mL of water, adding 15g of sodium nonylphenol polyoxyethylene ether sulfonate, stirring for dissolving, and adding water to 1000mL to obtain a main light agent solution for later use.
2. Preparation of softener solution
Dissolving 30g of 2-naphthalenesulfonic acid formaldehyde polymer sodium salt in 500mL of water, adding 120g of sodium benzoate and 60g of sulfonic acid sodium salt, stirring until solid substances are completely dissolved, and adding water to 1000mL to obtain a softener solution for later use.
3. Preparation of plating solutions
Adding 50g of zinc chloride and 35g of boric acid into 500mL of water, heating to 60 ℃, stirring to dissolve the zinc chloride and the boric acid, adding 230g of potassium chloride, adding water to 900mL, standing and cooling; adding 1g of zinc powder and 1g of activated carbon for treatment for one hour, then filtering to obtain a clean filtrate, adding 1mL of the main brightening agent prepared in the step 1 and 30mL of the softening agent prepared in the step 2 into the filtrate, and then adding water to 1000mL to obtain the galvanizing electroplating solution.
Example 6
A preparation method of a galvanizing plating solution comprises the following steps:
1. preparation of the brightener solution
Dissolving 100g of methoxy o-chlorobenzaldehyde in 500mL of water, adding 15g of sodium nonylphenol polyoxyethylene ether sulfonate, stirring for dissolving, and adding water to 1000mL to obtain a main light agent solution for later use.
2. Preparation of softener solution
Dissolving 30g of 2-naphthalenesulfonic acid formaldehyde polymer sodium salt in 500mL of water, adding 120g of sodium benzoate and 60g of sulfonic acid sodium salt, stirring until solid substances are completely dissolved, and adding water to 1000mL to obtain a softener solution for later use.
3. Preparation of plating solutions
Adding 50g of zinc chloride and 35g of boric acid into 500mL of water, heating to 60 ℃, stirring to dissolve the zinc chloride and the boric acid, adding 250g of potassium chloride, adding water to 900mL, standing and cooling; adding 1g of zinc powder and 1g of activated carbon for treatment for one hour, then filtering to obtain a clean filtrate, adding 1mL of the main brightening agent prepared in the step 1 and 30mL of the softening agent prepared in the step 2 into the filtrate, and then adding water to 1000mL to obtain the galvanizing electroplating solution.
Example 7
A preparation method of a galvanizing plating solution comprises the following steps:
1. preparation of the brightener solution
Dissolving 100g of methoxy o-chlorobenzaldehyde in 500mL of water, adding 15g of sodium nonylphenol polyoxyethylene ether sulfonate, stirring for dissolving, and adding water to 1000mL to obtain a main light agent solution for later use.
2. Preparation of softener solution
Dissolving 30g of 2-naphthalenesulfonic acid formaldehyde polymer sodium salt in 500mL of water, adding 120g of sodium benzoate and 60g of sulfonic acid sodium salt, stirring until solid substances are completely dissolved, and adding water to 1000mL to obtain a softener solution for later use.
3. Preparation of plating solutions
Adding 50g of zinc chloride and 35g of boric acid into 500mL of water, heating to 60 ℃, stirring to dissolve the zinc chloride and the boric acid, adding 250g of potassium chloride, adding water to 900mL, standing and cooling; adding 1g of zinc powder and 1g of activated carbon for treatment for one hour, then filtering to obtain a clean filtrate, adding 0.5mL of the main light agent prepared in the step 1 and 30mL of the softening agent prepared in the step 2 into the filtrate, and then adding water to 1000mL to obtain the galvanizing electroplating solution.
Example 8
A preparation method of a galvanizing plating solution comprises the following steps:
1. preparation of the brightener solution
Dissolving 100g of methoxy o-chlorobenzaldehyde in 500mL of water, adding 15g of sodium nonylphenol polyoxyethylene ether sulfonate, stirring for dissolving, and adding water to 1000mL to obtain a main light agent solution for later use.
2. Preparation of softener solution
Dissolving 30g of 2-naphthalenesulfonic acid formaldehyde polymer sodium salt in 500mL of water, adding 120g of sodium benzoate and 60g of sulfonic acid sodium salt, stirring until solid substances are completely dissolved, and adding water to 1000mL to obtain a softener solution for later use.
3. Preparation of plating solutions
Adding 50g of zinc chloride and 35g of boric acid into 500mL of water, heating to 60 ℃, stirring to dissolve the zinc chloride and the boric acid, adding 250g of potassium chloride, adding water to 900mL, standing and cooling; adding 1g of zinc powder and 1g of activated carbon for treatment for one hour, then filtering to obtain a clean filtrate, adding 1mL of the main brightening agent prepared in the step 1 and 20mL of the softening agent prepared in the step 2 into the filtrate, and then adding water to 1000mL to obtain the galvanizing electroplating solution.
Example 9
A preparation method of a galvanizing plating solution comprises the following steps:
1. preparation of the brightener solution
Dissolving 100g of methoxy o-chlorobenzaldehyde in 500mL of water, adding 15g of sodium nonylphenol polyoxyethylene ether sulfonate, stirring for dissolving, and adding water to 1000mL to obtain a main light agent solution for later use.
2. Preparation of softener solution
Dissolving 30g of 2-naphthalenesulfonic acid formaldehyde polymer sodium salt in 500mL of water, adding 120g of sodium benzoate and 60g of sulfonic acid sodium salt, stirring until solid substances are completely dissolved, and adding water to 1000mL to obtain a softener solution for later use.
3. Preparation of plating solutions
Adding 50g of zinc chloride and 35g of boric acid into 500mL of water, heating to 60 ℃, stirring to dissolve the zinc chloride and the boric acid, adding 250g of potassium chloride, adding water to 900mL, standing and cooling; adding 1g of zinc powder and 1g of activated carbon for treatment for one hour, then filtering to obtain a clean filtrate, adding 3mL of the main brightening agent prepared in the step 1 and 5mL of the softening agent prepared in the step 2 into the filtrate, and then adding water to 1000mL to obtain the galvanizing electroplating solution.
Comparative example 1
In addition to the above example 8, the main light agent prepared in step 1 was not added to the preparation of the plating solution in step 3, and a plating bath for zinc plating was obtained in the same manner as in the other steps.
Comparative example 2
In addition to the above example 8, the plating bath prepared in step 3 was prepared in the same manner as in the other steps without adding the softening agent prepared in step 2.
Test example
The results of plating the surfaces of the iron pieces with the plating solutions prepared in examples 1 to 9 and comparative examples 1 to 2, respectively, and measuring the surface gloss and the plating depth of the iron pieces are shown in table 1:
TABLE 1
| Surface gloss | Coating depth/mm | |
| Example 1 | High glossiness | 94.3 |
| Example 2 | High glossiness | 90.3 |
| Example 3 | High glossiness | 101.2 |
| Example 4 | High glossiness | 92.4 |
| Example 5 | High glossiness | 93.6 |
| Example 6 | High glossiness | 96.4 |
| Example 7 | The glossiness is darker | 95.3 |
| Example 8 | General degree of gloss | 80.1 |
| Example 9 | The glossiness is darker | 74.8 |
| Comparative example 1 | Dull luster | 71.4 |
| Comparative example 2 | Dull luster | 9.6 |
The results of performance analysis after plating iron pieces by the different plating solutions prepared in the above test examples are shown in Table 1. The plating solution prepared by the invention can obtain a plating layer with high glossiness after being electroplated, and the influence of the content of the self-made water-soluble main light agent added into the plating solution on the brightness of the plated plating layer is obvious by comparing the results of the examples 7-8 and the comparative example 1, and the results of the example 9, the comparative example 1 and the comparative example 2 show that the main light agent and the softening agent can provide certain glossiness of the plating layer when being used in combination, which is probably related to the effect of the main light agent solubilized by the softening agent. The results of examples 1 to 9 and comparative example 2 show that the softening agent has a large influence on the depth of the plated layer after the plating solution is electroplated, and the concentrations of zinc chloride, boric acid and potassium chloride in the plating solution also have a certain influence on the depth of the plated layer.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A zinc plating solution, characterized by comprising the components: 20 g/L-80 g/L of zinc chloride, 200 g/L-300 g/L of potassium chloride, 20 g/L-50 g/L of boric acid, 0.3 mL/L-3 mL/L of main light agent and 20 mL/L-35 mL/L of softening agent, wherein the main light agent is prepared from an aqueous solution containing a carrier and a brightening agent, and the softening agent is prepared from an aqueous solution containing a dispersing agent and a dispersing agent;
the carrier is sodium nonylphenol polyoxyethylene ether sulfonate, and the brightener is methoxy o-chlorobenzaldehyde;
the dispersing agent is 2-naphthalenesulfonic acid formaldehyde polymer sodium salt, and the dispersing agent is a mixture of sodium benzoate and sulfonic acid sodium salt.
2. The plating bath as recited in claim 1 comprising the components: 40-60 g/L of zinc chloride, 220-250 g/L of potassium chloride, 30-35 g/L of boric acid, 0.5-2 mL/L of main light agent and 25-30 mL/L of softening agent.
3. The plating solution of claim 1, wherein the concentration of the carrier in the aqueous solution is 10 to 20g/L, and the concentration of the brightener in the aqueous solution is 80 to 120 g/L.
4. The plating solution of any one of claims 1 to 3, wherein the concentration of the dispersant in the aqueous solution is 20g/L to 40g/L, and the concentration of the dispersant in the aqueous solution is 160g/L to 200 g/L.
5. A method for producing the plating solution of zinc plating according to any one of claims 1 to 4, characterized by comprising the steps of:
(1) preparation of the brightener solution: dissolving brightener in water, adding carrier, stirring and dissolving to obtain main brightener solution;
(2) preparation of softener solution: dissolving a dispersing agent in water, adding a dispersing agent, and stirring for dissolving to obtain a softening agent solution;
(3) preparing a plating solution: adding zinc chloride and boric acid into water, heating and stirring to dissolve, adding potassium chloride, dissolving, standing and cooling; and (3) adding zinc powder and activated carbon for treatment, filtering, taking filtrate, and adding the main light agent solution obtained in the step (1) and the softening agent solution obtained in the step (2) to obtain the plating solution.
6. The method for preparing a plating solution for zinc plating according to claim 5 wherein the heating temperature in step (3) is 50 ℃ to 70 ℃.
7. The production method of a plating solution according to claim 5, wherein the amount of zinc powder used in step (3) is 1 g/L; and/or the presence of a gas in the gas,
the dosage of the active carbon is 1 g/L.
8. The method of producing a zinc-plating bath according to any one of claims 5 to 7, wherein the zinc powder and activated carbon treatment time in step (3) is 0.5 to 1.5 hours.
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| CN102383152B (en) * | 2011-11-17 | 2013-11-27 | 广州三孚新材料科技有限公司 | Low-foam carrier brightening agent and using method thereof |
| CN105200463A (en) * | 2015-11-03 | 2015-12-30 | 江苏梦得电镀化学品有限公司 | Preparation method of cyanide-free alkaline rack zinc plating solution and electroplating technology |
| CN108149283A (en) * | 2017-11-29 | 2018-06-12 | 武汉风帆电化科技股份有限公司 | A kind of zinc-plated low soaked dissolubility electroplate liquid and preparation method thereof |
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