CN104099650A - Dehydrator - Google Patents
Dehydrator Download PDFInfo
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- CN104099650A CN104099650A CN201410376889.3A CN201410376889A CN104099650A CN 104099650 A CN104099650 A CN 104099650A CN 201410376889 A CN201410376889 A CN 201410376889A CN 104099650 A CN104099650 A CN 104099650A
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- dewatering agent
- agent according
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- dewatering
- dehydrator
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Abstract
The invention belongs to the technical field of chemical products and particularly relates to a dehydrator used for surface dehydration of electroplated workpieces. The dehydrator comprises, by weight, 20-30% of plant extract aliphatic acid, 25-35% of stabilizer, 3-7% of thickener, 0.1-0.5% of antifreeze, 1-7% of thinner and the balance being water. As compared with the prior art, the dehydrator is prepared by creatively taking the plant extract aliphatic acid which is biodegradable as a surfactant and adding the antifreeze, so that caking and solidifying of the dehydrator are prevented even at a low temperature, surfaces of the electroplated workpieces which are treated with the dehydrator are free of defects such as water stains, water drops and yellow sports, and the dehydrator has good dehydrating effect.
Description
Technical field
The invention belongs to technical field of chemical products, particularly a kind of dewatering agent for electroplating parts surface dewatering.
Background technology
Workpiece outward appearance and color after electroplating can meet the demands; but without the electroplating parts of processing later; start to change at utmost point short period of time outer; color also starts to change; so need to do immediately corresponding aftertreatment to play the effect of the outside surface of protecting electroplating parts, make electroplating parts maintain its appearance requirement.
At present, some small-sized plating factory owners will adopt natural ventilation to dry, dry the method drying up with pressurized air electroplating parts is carried out to aftertreatment, but the problems such as production efficiency is low, power consumption large (latter two method), difficult to govern control that these methods exist, cannot form continuously, produce in batches, and product quality is unstable.
Also have some Electroplate Factories to adopt organic solvent to carry out aftertreatment to the surface of electroplating parts, to reach the object of dehydration, but organic solvent is inflammable, explosive, volatile, therefore can aggravating working environment, the health of operator to this solvent of Long Term Contact is unfavorable, and also have potential safety hazard, and cost is higher.
Therefore, some enterprises bring into use dewatering agent to carry out aftertreatment to electroplating parts.Conventional dewatering agent is the mixture of kinds of surface promoting agent (as triethanolamine oleate, sapn and tween etc.) at present, when use, metal plating is soaked in the solution that contains kinds of surface promoting agent, utilize the absorption of tensio-active agent and metallic surface, make metallic surface produce hydrophobic membrane, reach dehydration.But the dehydrating effect of dewatering agent of the prior art is not remarkable, adopt its surface of carrying out the electroplating parts after aftertreatment to there will be the phenomenons such as a certain proportion of sweat point, the globule and macula lutea be bad.In addition, due to the physical properties difference of various tensio-active agents, when room temperature is during lower than 10 DEG C, dewatering agent (as triethanolamine oleate) easily forms solid shape colloid, caking solidifies and cannot take out use, use difficulty thereby increased, and it is higher to adopt comparatively cold winter this dewatering agent to carry out surperficial sweat point, the globule and the bad ratio of macula lutea of the electroplating parts after aftertreatment at weather, cannot meet industry demand.
In view of this, though necessary provide a kind of dehydrating effect good and winter use can not lump yet solidify, the dewatering agent of safety and environmental protection.
Summary of the invention
The object of the invention is to: for the deficiencies in the prior art, even and provide a kind of dehydrating effect good and winter use can not lump yet solidify, the dewatering agent of safety and environmental protection.
To achieve these goals, the present invention adopts following technical scheme:
A kind of dewatering agent, by weight percentage, comprises following component:
One as dewatering agent of the present invention is improved, described plant extract lipid acid is at least one in oleic acid, linolic acid, linolenic acid, arachidonic acid and erucic acid, this several lipid acid is the lipid acid that can directly extract from plant (as peanut, sesame, soybean, corn and sunflower seeds etc.), contain unsaturated carbon-carbon double bond, liquid state, is also difficult for solidifying caking even if temperature is lower.
Improve as the one of dewatering agent of the present invention, described stablizer is at least one at least one and tertiarybutylhydroquinone, butylated hydroxy anisole and the 2,6 di tert butyl 4 methyl phenol in triethylamine, quadrol, diethanolamine and diethylamine.Front several stablizers are equivalent to the effect of sequestrant, make plant extract lipid acid form stable micella, thereby can stablize plant extract lipid acid.Rear several stablizer plays oxidation resistant effect, can prevent the oxidized generation of solidifying caking phenomenon causing of undersaturated carbon-carbon double bond because of plant extract lipid acid owing to containing undersaturated carbon-carbon double bond in plant extract lipid acid, adding the stablizer with antioxygenation.Wherein, the stablizer that plays sequestering action is (5～50) with the mass ratio of the stablizer with antioxygenation: 1.
One as dewatering agent of the present invention is improved, and described thickening material is at least one in Natvosol, methyl hydroxyethylcellulose, Type 3U, methylhydroxypropylcellulose, polyvinyl lactam, polyoxyethylene glycol and sodium alginate.Thickening material can improve viscosity, mechanical property and the stability in storage of dewatering agent.Wherein, the thickening mechanism of cellulose thickener is that hydrophobic main chain and the ambient water molecule of carboxymethyl cellulose passes through hydrogen bond association, has improved the fluid volume of cellulose thickener itself, has reduced the freely space of activity of micella, thereby has improved system viscosity.
One as dewatering agent of the present invention is improved, and the matter average molecular weight of described thickening material is 500～3000, to ensure that dewatering agent has certain viscosity and can not make again viscosity too large.
One as dewatering agent of the present invention is improved, and described frostproofer is at least one in methyl alcohol, ethanol, Virahol, ethylene glycol, propylene glycol, glycol ether, butyl glycol ether and propandiol butyl ether.These materials can reduce freezing point, ensure that dewatering agent does not freeze in the time of microthermal climate.
One as dewatering agent of the present invention is improved, described thinner is at least one in acetic acid/sodium acetate buffer solution, ammoniacal liquor/chloride buffer solution, Sodium phosphate dibasic/sodium dihydrogen phosphate buffer, sodium bicarbonate/carbonate buffer solution and saleratus/carbonate buffer solution, these buffered soln are all pH damping fluids, can stablize the pH value of whole dewatering agent system.
One as dewatering agent of the present invention is improved, and described dewatering agent also comprises that weight percent is 1%～2% pH adjusting agent, and described pH adjusting agent is sodium hydroxide or potassium hydroxide, makes the pH value of whole dewatering agent system higher, to improve its storage stability.
One as dewatering agent of the present invention is improved, and pH value when described dewatering agent uses is 10～11.If the pH value of dewatering agent while using is less than 10, its hydrophobic membrane in metallic surface formation in uneven thickness, metallic surface easily produces the globule, thereby greatly affects its dewatering.
One as dewatering agent of the present invention is improved, the working concentration of described dewatering agent is 10mL/L～20mL/L, by the present invention when aftertreatment is carried out in the surface of electroplating parts, the dewatering agent of the present invention that 1L dewatering agent solution contains 10mL～20mL in (dewatering agent of the present invention being added to the solution forming after stirring in distilled water).Dewatering agent concentration is too low, and its hydrophobic membrane forming in metallic surface is discontinuous, affects dehydrating effect; Dewatering agent concentration is too high, can cause the waste to dewatering agent.
With respect to prior art, the present invention creatively selects biodegradable plant extract lipid acid as tensio-active agent, carboxyl (hydrophilic group) is contained in one end of plant extract lipid acid, the other end is the long hydrocarbon chain of aliphatics (hydrophobic group), use it for when the workpiece after electroplating is carried out to aftertreatment, the hydrophilic absorption in carboxyl and metallic surface, thus hydrophobic membrane formed at metallic surface, reach the object of dehydration.This hydrophobic membrane can not be wiped by hand, but dissolves in polar solvent, if desired removes this hydrophobic membrane, only workpiece need be immersed in general polar solvent.Plant extract lipid acid is simple and easy to get, cost is lower, can be by decomposition such as bacteriums, meet the requirement of environmental protection, and, can there is not the caking problem of solidifying in plant extract lipid acid, adopt its surface of carrying out the electroplating parts after aftertreatment substantially to there will not be the phenomenons such as sweat point, the globule and macula lutea be bad in the time that temperature is lower, and dehydrating effect is better yet.
In addition, the present invention, by adding frostproofer, has further improved resistance to frost of the present invention, even if make it in temperature, the problem that caking solidifies can not occur yet very low winter.
Whole formula of the present invention is simple, use it for when electroplating parts is carried out to aftertreatment easy to operate, consumption is few, energy consumption is low, and can be decomposed by microorganisms such as bacteriums, at 5 DEG C～40 DEG C, can deposit 24 months, the aftertreatment of the workpiece after can being widely used in plating, alumilite process, steel iron phosphatising, resinous electricity and, remarkable for the preventive effect of the residual globule of workpiece surface, sweat point and macula lutea.Whole dewatering agent odorlessness, does not have corrodibility to human body skin, nonflammable, non-explosive, use safe and reliable, less to operator's healthy threat.
Embodiment
Below in conjunction with embodiment, the present invention and beneficial effect thereof are described in further detail, but embodiments of the present invention are not limited to this.
Embodiment 1
The dewatering agent that the present embodiment provides, by weight percentage, comprises following component:
When preparation, take in mass ratio each component, then oleic acid, triethylamine, butylated hydroxy anisole, Natvosol, ethylene glycol and acetic acid/sodium acetate buffer solution are added to the water in the lump, after stirring, obtain dewatering agent.Experiment shows, is that under the condition of 5 DEG C～40 DEG C, the dewatering agent that the present embodiment provides can be deposited 24 months in temperature.
When use, get the dewatering agent of the present embodiment, add in deionized water, stir, and to adjust pH value with sodium hydroxide or hydrochloric acid be 11, form translucent dewatering agent solution, wherein, the dewatering agent of the present embodiment containing in 1L dewatering agent solution is 15mL/L.
When electroplating parts is carried out to aftertreatment, first make electroplating parts through pure water groove, workpiece surface is carried out to twice washing (each time is 5s～10s) with pure water, then make electroplating parts through filling the groove (time is 35s) of above-mentioned dewatering agent, processed is carried out in the surface of workpiece with above-mentioned dewatering agent, make metallic surface form the hydrophobic membrane of one deck densification, wash (each time is 5s～10s) twice with pure water again, then use twice of hot pure water rinsing (each time is 5s～10s), at 80 DEG C, dry (time length is 20min～40min), completed the aftertreatment to electroplating parts surface.Electroplating parts passes through the time of the groove that fills above-mentioned dewatering agent and is advisable to be greater than 30s, because the soak time of electroplating parts in dewatering agent is too short, the thickness deficiency of hydrophobic membrane, cannot effectively dewater.
Wherein, need to change once after filling the groove non-stop run 24h of above-mentioned dewatering agent, if dewatering agent flavescence or while becoming muddy, or the pH value of dewatering agent is less than at 9.5 o'clock (in use procedure, pH value of need test per hour), need change immediately.Because the dehydrating effect with membership destruction dewatering agent of acidic substance: acidic substance destroy the hydrophobic membrane of metallic surface, produce poor dewatering, as formed the globule, spot and variable color etc.The processing of the waste water after replacing is identical with the treatment scheme of grease-removing agent waste water, and its COD and BOD than general grease-removing agent more easily by bacterial degradation.
In addition, experiment shows, in the time that the pH of dewatering agent is greater than 10, the impurity such as copper sulfate, single nickel salt, chromic acid and zinc-containing substance all cannot be adsorbed in hydrophobic membrane, after washing, impurity metal ion is diluted, and cannot remain in workpiece surface, and therefore impurity metal ion does not affect the dewatering of dewatering agent.And the impact of the dewatering of the temperature of dewatering agent on dewatering agent is very little, soaking thickness on hydrophobic membrane of time that the electroplating parts after dewatering agent stops and the dewatering of dewatering agent aloft does not almost affect.
The operation of whole aftertreatment can realize serialization and produce, and therefore can promote production capacity, reduce artificial, raising productivity effect, and ensure the stability of product quality.
Embodiment 2
The formula of dewatering agent as different from Example 1, the dewatering agent that the present embodiment provides, by weight percentage, comprises following component:
PH value when dewatering agent solution uses is that the dewatering agent of the present embodiment of containing in 10.5,1L dewatering agent solution is 10mL/L.
All the other,, with embodiment 1, repeat no more here.
Embodiment 3
The formula of dewatering agent as different from Example 1, the dewatering agent that the present embodiment provides, by weight percentage, comprises following component:
PH value when dewatering agent solution uses is that the dewatering agent of the present embodiment of containing in 10,1L dewatering agent solution is 17mL/L.
All the other,, with embodiment 1, repeat no more here.
Embodiment 4
The formula of dewatering agent as different from Example 1, the dewatering agent that the present embodiment provides, by weight percentage, comprises following component:
PH value when dewatering agent solution uses is that the dewatering agent of the present embodiment of containing in 10.3,1L dewatering agent solution is 12mL/L.
All the other,, with embodiment 1, repeat no more here.
Embodiment 5
The formula of dewatering agent as different from Example 1, the dewatering agent that the present embodiment provides, by weight percentage, comprises following component:
PH value when dewatering agent solution uses is that the dewatering agent of the present embodiment of containing in 10.7,1L dewatering agent solution is 18mL/L.
The electroplating parts that adopts the method described in embodiment 1 to 5 to carry out after aftertreatment is tested, found that: the surface of electroplating parts is carried out after the high bake of 300 DEG C, the phenomenons such as metallic surface can not turn to be yellow, blackout and variable color, and the fraction of coverage of sticky tin test at 245 DEG C reaches more than 95%.Metallic surface can also prevent the generation of fingerprint, and dewatering agent provided by the invention also has slight rust inhibition (hydrophobic interaction of hydrophobic membrane) to metallic surface.Also need to carry out in metallic surface if follow-up electrostatic spraying, electricity with the treatment process such as baking vanish, be not all subject to the impact of hydrophobic membrane through bonding force, weldability and the electroconductibility of dewatering agent of the present invention metallic surface after treatment.
The announcement of book and instruction according to the above description, those skilled in the art in the invention can also change and revise above-mentioned embodiment.Therefore, the present invention is not limited to embodiment disclosed and described above, also should fall in the protection domain of claim of the present invention modifications and changes more of the present invention.In addition,, although used some specific terms in this specification sheets, these terms just for convenience of description, do not form any restriction to the present invention.
Claims (10)
1. a dewatering agent, is characterized in that, by weight percentage, comprises following component:
2. dewatering agent according to claim 1, is characterized in that: described plant extract lipid acid is at least one in oleic acid, linolic acid, linolenic acid, arachidonic acid and erucic acid.
3. dewatering agent according to claim 1, it is characterized in that: described stablizer comprises at least one at least one and tertiarybutylhydroquinone, butylated hydroxy anisole and the 2,6 di tert butyl 4 methyl phenol in triethylamine, quadrol, diethanolamine and diethylamine.
4. dewatering agent according to claim 1, is characterized in that: described thickening material is at least one in Natvosol, methyl hydroxyethylcellulose, Type 3U, methylhydroxypropylcellulose, polyvinyl lactam, polyoxyethylene glycol and sodium alginate.
5. dewatering agent according to claim 4, is characterized in that: the matter average molecular weight of described thickening material is 500～3000.
6. dewatering agent according to claim 1, is characterized in that: described frostproofer is at least one in methyl alcohol, ethanol, Virahol, ethylene glycol, propylene glycol, glycol ether, butyl glycol ether and propandiol butyl ether.
7. dewatering agent according to claim 1, is characterized in that: described thinner is at least one in acetic acid/sodium acetate buffer solution, ammoniacal liquor/chloride buffer solution, Sodium phosphate dibasic/sodium dihydrogen phosphate buffer, sodium bicarbonate/carbonate buffer solution and saleratus/carbonate buffer solution.
8. dewatering agent according to claim 1, is characterized in that: described dewatering agent also comprises that weight percent is 1%～2% pH adjusting agent, and described pH adjusting agent is sodium hydroxide or potassium hydroxide.
9. dewatering agent according to claim 1, is characterized in that: pH value when described dewatering agent uses is 10～11.
10. dewatering agent according to claim 1, is characterized in that: the working concentration of described dewatering agent is 10mL/L～20mL/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410376889.3A CN104099650B (en) | 2014-08-01 | 2014-08-01 | A kind of dehydrating agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410376889.3A CN104099650B (en) | 2014-08-01 | 2014-08-01 | A kind of dehydrating agent |
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| Publication Number | Publication Date |
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| CN104099650A true CN104099650A (en) | 2014-10-15 |
| CN104099650B CN104099650B (en) | 2018-03-20 |
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| CN201410376889.3A Active CN104099650B (en) | 2014-08-01 | 2014-08-01 | A kind of dehydrating agent |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108396350A (en) * | 2018-03-20 | 2018-08-14 | 粟飞 | Dehydrating agent after a kind of plating |
| CN109423670A (en) * | 2017-08-21 | 2019-03-05 | 珠海市椿田机械科技有限公司 | The preparation method and its electroplate liquid of track copper bar plating nickel on surface tungsten phosphorus alloy |
| CN112267135A (en) * | 2020-10-19 | 2021-01-26 | 扬州市景杨表面工程有限公司 | Zinc-nickel alloy electroplating process for vacuum brake booster shell of new energy automobile |
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| CN112267135A (en) * | 2020-10-19 | 2021-01-26 | 扬州市景杨表面工程有限公司 | Zinc-nickel alloy electroplating process for vacuum brake booster shell of new energy automobile |
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| CN104099650B (en) | 2018-03-20 |
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