CN104988543A - Environment-friendly brightener for non-cyanide alkaline zinc plating and preparation method thereof - Google Patents
Environment-friendly brightener for non-cyanide alkaline zinc plating and preparation method thereof Download PDFInfo
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- CN104988543A CN104988543A CN201510474643.4A CN201510474643A CN104988543A CN 104988543 A CN104988543 A CN 104988543A CN 201510474643 A CN201510474643 A CN 201510474643A CN 104988543 A CN104988543 A CN 104988543A
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Abstract
The invention relates to the technical field of electroplating additives and discloses environment-friendly brightener for non-cyanide alkaline zinc plating and a preparation method thereof. The brightener is prepared through polymine, IMZE, nitrogen heterocyclic derivatives, modified aromatic aldehyde compounds, epoxy chloropropane and water. According to the environment-friendly brightener for non-cyanide alkaline zinc plating and the preparation method thereof, the brightness of a galvanization layer is improved, the thickness of the galvanization layer can reach 30 micrometers, the galvanization layer is free of frangibility, and the dispersing power and the covering power of plating solution exceed those of traditional alkaline zinc plating brightener.
Description
Technical field
The present invention relates to electroplating additive technical field, be specifically related to a kind of environmental non-cyanide alkaline zinc plating brightening agent and preparation method thereof.
Background technology
In a very long time in the past, because cyanide bath good stability, covering power is strong, and the reasons such as coating is careful, and solidity to corrosion is good, prussiate zincincation is widely adopted.But, because in prussiate galvanizing process, liberation of hydrogen is serious, zinc coating is caused to have very high fragility, add prussiate galvanizing solution and there is very high toxicity, wastewater treatment difficulty, serious to air and groundwater pollution, present alkaline zinc plating and slightly acidic zincincation are developed gradually and to carry out substitute for industry plating zinc-plated.Corresponding prussiate zincincation, the destructive force of alkaline galvanizing technology to environment reduces greatly, but the current efficiency of plating solution not high (about 70%), to make metallic matrix that the problem of " hydrogen embrittlement " occur more serious for the precipitation of a large amount of hydrogen and the hydrogen that oozes that produces, increase the weight of the burden of dehydrogenation after electro-galvanizing, in alkaline zinc plating liquid, the employing of a large amount of organic additive makes the fragility of coating increase, and coating is thicker, and brittleness problems is more serious.
In use, easily occur that luminance brightness sent out dim by coating not high, thickness of coating is easily foaming more than 10 microns more than, and fragility is larger for tradition non-cyanide alkali zinc-plating brightener.Plating solution narrow ranges of process parameters, current density range is little, and solution dispersibility and covering power difference cause the product height Current Zone of electroplating out to follow the thickness difference in low current district very large.
Since the sixties; in order to ensure the requirement basis that coating performance is good reaching further environment protection; in zincincation, mainly adopt low cyanogen, micro-cyanogen and cyanogenless electroplating technology, promote that the key of this technique progress is to develop high performance electroplating additive.Since 80 offsprings, in order to the requirement of the low chromium of scalable use, ultra-low passivation technique, and improve zinc-plated state of the art further, electroplating industry brings into use exclusively organic synthesis zinc-plating brightener, to obtain the surfacing of high brightness, then price is higher for some multiple organic synthesis product composition type electroplating additives of external import, limits and promotes the use of on a large scale.
Summary of the invention
The object of the invention is to overcome defect of the prior art, a kind of environmental non-cyanide alkaline zinc plating brightening agent and preparation method thereof is provided, not only improve zinc coating luminance brightness, thickness can reach 30 microns without fragility, solution dispersibility and covering power exceed traditional alkaline electrogalvanize bright agent, and environmental protection.
To achieve these goals, a kind of environmental non-cyanide alkaline zinc plating brightening agent provided by the invention, described brightening agent is obtained by polymine, imidazoles propoxy-condenses, nitrogen heterocycles derivative, modified aromatic aldehyde compound, epoxy chloropropane and water.
Further, in described brightening agent, each component concentration is counted by weight: polymine 10 ~ 20 parts, imidazoles propoxy-condenses 15 ~ 25 parts, 25 ~ 35 parts, nitrogen heterocycles derivative, modified aromatic aldehyde compound 13 ~ 23 parts, epoxy chloropropane 70 ~ 80 parts, 400 ~ 500 parts, water.
A preparation method for environmental non-cyanide alkaline zinc plating brightening agent, is prepared by following steps:
S1, polymine, imidazoles propoxy-condenses, nitrogen heterocycles derivative, modified aromatic aldehyde compound and water are added in reactor, be warming up to 45 DEG C;
S2, epoxy chloropropane is added in dropping funnel, in the reactor slowly in instillation step S1 and stirring reaction;
S3, be added dropwise to complete after epoxy chloropropane through step S2, the temperature of reactor be increased to 80 DEG C, stirring reaction 6 h, obtain environmental non-cyanide alkaline zinc plating brightening agent.
Further, in described step S1 and S2, each material composition content is counted by weight: polymine 10 ~ 20 parts, imidazoles propoxy-condenses 15 ~ 25 parts, 25 ~ 35 parts, nitrogen heterocycles derivative, modified aromatic aldehyde compound 13 ~ 23 parts, epoxy chloropropane 70 ~ 80 parts, 400 ~ 500 parts, water.
Further, described step S2 temperature of reaction is no more than 45 DEG C, and time for adding is 3 ~ 5 h.
Beneficial effect of the present invention:
1, a kind of environmental non-cyanide alkaline zinc plating brightening agent dispersive ability provided by the invention reaches 84.12%, far above the dispersive ability of 59.4% ~ 72.7% of domestic pharmaceutical industry industry, close to the dispersive ability of 86.04% of advanced foreign technology.
2, after adopting a kind of environmental non-cyanide alkaline zinc plating brightening agent provided by the invention, plating solution performance comparatively domestic corporation is improved largely, significantly improve coating surface glossiness and stability, though also still have certain gap comparatively abroad, but external high-tech technical monopoly is broken for the domestic non-cyanide alkali galvanizing technique of lifting, there is pioneering and enthusiasm beyond doubt greatly, there are wide market outlook.
3, a kind of environmental non-cyanide alkaline zinc plating brightening agent provided by the invention is adopted, the zinc coating of full sheet bright in mirror surface can be obtained in alkaline non-cyanogen galvanization electroplate liquid, current density range is wide, can obtain surfacing, anti-discoloration is good, anticorrosive wear-resistant is high.
4, a kind of environmental non-cyanide alkaline zinc plating brightening agent provided by the invention is applied in the zinc-plated electroplate liquid of non-cyanide alkali, and binding force of cladding material is good, dispersive ability and covering power good, electroplating wastewater processing is easier, safeguards simple, economical and practical.
Embodiment
Below embodiments of the present invention are elaborated.It is emphasized that following explanation is only exemplary, instead of in order to limit the scope of the invention and apply.
Embodiment 1
A preparation method for environmental non-cyanide alkaline zinc plating brightening agent, is prepared by following steps:
S1,10 parts of polymines, 15 parts of imidazoles propoxy-condensess, 25 parts of nitrogen heterocycles derivatives, 13 parts of modified aromatic aldehyde compounds and 400 parts of water are added in reactor, be warming up to 45 DEG C;
S2, add in dropping funnel by 70 parts of epoxy chloropropane, in the reactor slowly in instillation step S1 and stirring reaction, temperature of reaction is no more than 45 DEG C, and time for adding is 3 ~ 5 h;
S3, be added dropwise to complete after epoxy chloropropane through step S2, the temperature of reactor be increased to 80 DEG C, stirring reaction 6 h, obtain environmental non-cyanide alkaline zinc plating brightening agent.
Embodiment 2
A preparation method for environmental non-cyanide alkaline zinc plating brightening agent, is prepared by following steps:
S1,15 parts of polymines, 20 parts of imidazoles propoxy-condensess, 30 parts of nitrogen heterocycles derivatives, 18 parts of modified aromatic aldehyde compounds and 450 parts of water are added in reactor, be warming up to 45 DEG C;
S2, add in dropping funnel by 75 parts of epoxy chloropropane, in the reactor slowly in instillation step S1 and stirring reaction, temperature of reaction is no more than 45 DEG C, and time for adding is 3 ~ 5 h;
S3, be added dropwise to complete after epoxy chloropropane through step S2, the temperature of reactor be increased to 80 DEG C, stirring reaction 6 h, obtain environmental non-cyanide alkaline zinc plating brightening agent.
Embodiment 3
A preparation method for environmental non-cyanide alkaline zinc plating brightening agent, is prepared by following steps:
S1,20 parts of polymines, 25 parts of imidazoles propoxy-condensess, 35 parts of nitrogen heterocycles derivatives, 13 ~ 23 parts of modified aromatic aldehyde compounds and 500 parts of water are added in reactor, be warming up to 45 DEG C;
S2, add in dropping funnel by 80 parts of epoxy chloropropane, in the reactor slowly in instillation step S1 and stirring reaction, temperature of reaction is no more than 45 DEG C, and time for adding is 3 ~ 5 h;
S3, be added dropwise to complete after epoxy chloropropane through step S2, the temperature of reactor be increased to 80 DEG C, stirring reaction 6 h, obtain environmental non-cyanide alkaline zinc plating brightening agent.
Environmental non-cyanide alkaline zinc plating brightening agent electroplate liquid performance test prepared by embodiment 1-3, result is as follows:
Known by above-mentioned performance test table: a kind of environmental non-cyanide alkaline zinc plating brightening agent dispersive ability provided by the invention reaches 84.12%, far above the dispersive ability of 59.4% ~ 72.7% of domestic pharmaceutical industry industry, close to the dispersive ability of 86.04% of advanced foreign technology.Adopt a kind of environmental non-cyanide alkaline zinc plating brightening agent provided by the invention, the zinc coating of full sheet bright in mirror surface can be obtained in alkaline non-cyanogen galvanization electroplate liquid, current density range is wide, surfacing can be obtained, anti-discoloration is good, anticorrosive wear-resistant is high, binding force of cladding material is good, dispersive ability and covering power good, electroplating wastewater processing is easier, safeguard simple, economical and practical.
Beneficial effect of the present invention:
1, a kind of environmental non-cyanide alkaline zinc plating brightening agent dispersive ability provided by the invention reaches 84.12%, far above the dispersive ability of 59.4% ~ 72.7% of domestic pharmaceutical industry industry, close to the dispersive ability of 86.04% of advanced foreign technology.
2, after adopting a kind of environmental non-cyanide alkaline zinc plating brightening agent provided by the invention, plating solution performance comparatively domestic corporation is improved largely, significantly improve coating surface glossiness and stability, though also still have certain gap comparatively abroad, but external high-tech technical monopoly is broken for the domestic non-cyanide alkali galvanizing technique of lifting, there is pioneering and enthusiasm beyond doubt greatly, there are wide market outlook.
3, a kind of environmental non-cyanide alkaline zinc plating brightening agent provided by the invention is adopted, the zinc coating of full sheet bright in mirror surface can be obtained in alkaline non-cyanogen galvanization electroplate liquid, current density range is wide, can obtain surfacing, anti-discoloration is good, anticorrosive wear-resistant is high.
4, a kind of environmental non-cyanide alkaline zinc plating brightening agent provided by the invention is applied in the zinc-plated electroplate liquid of non-cyanide alkali, and binding force of cladding material is good, dispersive ability and covering power good, electroplating wastewater processing is easier, safeguards simple, economical and practical.
Last it is noted that obviously, above-described embodiment is only for example of the present invention is clearly described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of amplifying out or variation be still among protection scope of the present invention.
Claims (5)
1. an environmental non-cyanide alkaline zinc plating brightening agent, is characterized in that, described brightening agent is obtained by polymine, imidazoles propoxy-condenses, nitrogen heterocycles derivative, modified aromatic aldehyde compound, epoxy chloropropane and water.
2. a kind of environmental non-cyanide alkaline zinc plating brightening agent according to claim 1, it is characterized in that, in described brightening agent, each component concentration is counted by weight: polymine 10 ~ 20 parts, imidazoles propoxy-condenses 15 ~ 25 parts, 25 ~ 35 parts, nitrogen heterocycles derivative, modified aromatic aldehyde compound 13 ~ 23 parts, epoxy chloropropane 70 ~ 80 parts, 400 ~ 500 parts, water.
3. the preparation method of a kind of environmental non-cyanide alkaline zinc plating brightening agent according to any one of claim 1 or 2, be is characterized in that, prepared by following steps:
S1, polymine, imidazoles propoxy-condenses, nitrogen heterocycles derivative, modified aromatic aldehyde compound and water are added in reactor, be warming up to 45 DEG C;
S2, epoxy chloropropane is added in dropping funnel, in the reactor slowly in instillation step S1 and stirring reaction;
S3, be added dropwise to complete after epoxy chloropropane through step S2, the temperature of reactor be increased to 80 DEG C, stirring reaction 6 h, obtain environmental non-cyanide alkaline zinc plating brightening agent.
4. the preparation method of a kind of environmental non-cyanide alkaline zinc plating brightening agent according to claim 3, it is characterized in that, in described step S1 and S2, each material composition content is counted by weight: polymine 10 ~ 20 parts, imidazoles propoxy-condenses 15 ~ 25 parts, 25 ~ 35 parts, nitrogen heterocycles derivative, modified aromatic aldehyde compound 13 ~ 23 parts, epoxy chloropropane 70 ~ 80 parts, 400 ~ 500 parts, water.
5. the preparation method of a kind of environmental non-cyanide alkaline zinc plating brightening agent according to claim 3, it is characterized in that, described step S2 temperature of reaction is no more than 45 DEG C, and time for adding is 3 ~ 5 h.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105951139A (en) * | 2016-07-15 | 2016-09-21 | 佛山市仁昌科技有限公司 | Non-cyanogen alkali silver plating process |
| CN110079840A (en) * | 2019-04-26 | 2019-08-02 | 山东金宝电子股份有限公司 | A kind of surface treatment additive package improving copper foil high-temp antioxidizing performance |
| CN110093638A (en) * | 2019-04-30 | 2019-08-06 | 兴化市华成镀锌管件有限公司 | A kind of improved non-cyanide alkali galvanizing flux |
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| CN105951139A (en) * | 2016-07-15 | 2016-09-21 | 佛山市仁昌科技有限公司 | Non-cyanogen alkali silver plating process |
| CN110079840A (en) * | 2019-04-26 | 2019-08-02 | 山东金宝电子股份有限公司 | A kind of surface treatment additive package improving copper foil high-temp antioxidizing performance |
| CN110093638A (en) * | 2019-04-30 | 2019-08-06 | 兴化市华成镀锌管件有限公司 | A kind of improved non-cyanide alkali galvanizing flux |
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