CN106167914A - A kind of magnesium alloy release agent for electrolytic - Google Patents
A kind of magnesium alloy release agent for electrolytic Download PDFInfo
- Publication number
- CN106167914A CN106167914A CN201610468133.0A CN201610468133A CN106167914A CN 106167914 A CN106167914 A CN 106167914A CN 201610468133 A CN201610468133 A CN 201610468133A CN 106167914 A CN106167914 A CN 106167914A
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- Prior art keywords
- magnesium alloy
- electrolytic
- parts
- agent
- release agent
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Classifications
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F5/00—Electrolytic stripping of metallic layers or coatings
Abstract
The invention discloses a kind of magnesium alloy release agent for electrolytic, its raw material includes by weight: oxidant: 50 100 parts；Conducting salt: 100 180 parts；Corrosion inhibiter: 30 60 parts；Chelating agent: 10 20 parts；Fog inhibitor: 13 parts；Buffer agent: 45 60 parts.Magnesium alloy release agent for electrolytic disclosed by the invention has to copper coating that strip is effective, efficiency is high, environmental protection, the advantage that is beneficial to safety in production, it is possible to reduce cost, increase the benefit.
Description
Technical field
The present invention relates to electroplating technology field, be specifically related to a kind of magnesium alloy release agent for electrolytic.
Background technology
In electroplating technology field, due to electroplating facility can run in actual electroplating process various uncertain factor (as
Machinery equipment, material, operational method, environment, management etc.), therefore in large-scale industrial production, electricity often occurs
Plating defective products, causes a large amount of waste, makes cost increase.For reduce waste, cost-effective, it will usually use various method by bad
Product surface of the work coating peels off, it is achieved the recovery of workpiece uses.Conventional stripping means is divided into chemical stripping and electrolysis stripping.
At present, magnesium alloy surface coating is peeled off or in the way of chemical stripping, by the coating work of Mg alloy surface
The copper coating on part surface peels off, it is achieved the recovery of magnesium alloy work-piece surface copper material uses.During for guaranteeing to peel off, its conduction is good
Good, it is commonly employed as the copper coating of the strong acid such as nitric acid, sulphuric acid corrosion stripping Mg alloy surface.But, utilize the strong corruption such as nitric acid
Coating is peeled off in erosion agent, can constantly discharge substantial amounts of tobacco and discharge the highest heat when reaction during strip, right
Operator's health and safety have the biggest danger；The tobacco (being mainly composed of nitrogen dioxide) simultaneously discharged etc. produce
Raw large quantity of exhaust gas can cause environmental pollution, easily causes the generation of acid rain；Perishable workpiece substrate, the recovery affecting workpiece uses.
For meeting the needs of environmentally friendly safety in production, improve effect and the efficiency of strip further, be badly in need of finding more
Good magnesium alloy release agent for electrolytic solves the problems referred to above.
Summary of the invention
In view of this, the present invention discloses the environmental-protection type magnesium alloy electricity that a kind of strip is effective, efficiency is high, be beneficial to safety in production
Solve remover.
The purpose of the present invention is achieved through the following technical solutions:
A kind of magnesium alloy release agent for electrolytic, its raw material includes by weight:
Oxidant: 50-100 part；
Conducting salt: 100-180 part；
Corrosion inhibiter: 30-60 part；
Chelating agent: 10-20 part；
Fog inhibitor: 1-5 part；
Buffer agent: 45-60 part；
Wherein, described oxidant is bichromate, and described conducting salt is nitrate, and described corrosion inhibiter is Fluohydric acid. or Fluohydric acid.
Salt, described chelating agent is alcohol compound, and described fog inhibitor is dodecyl benzene sulfonate, and described buffer agent is acetate.
Further, the one or several during described oxidant is potassium dichromate, sodium dichromate, Calcium bichromate., Ammonium bichromate.
Kind.
Use bichromate as oxidant, during electrolysis, the metal copper layer of Mg alloy surface is had well
Oxidation effectiveness.Concrete, in the presence of hydrion, the central atom in dichromate ion forms d-p π key etc. with oxygen atom
The chemical bond of similar effect strengthens the diffusivity of electron cloud so that it is can be very that the electron cloud of central atom reduces at pH value
Good is cut in；According further to Nai Site (or claiming energy this spy) equation, containing O atom in dichromate ion, product has water,
So being that in the case of H+ concentration increases, reaction tendency can be strengthened in acid condition, showing strong oxidizing property, can be copper
Oxidant, dichromate ion makes coated metal dissolve stripping at anode discharge, thus reaches to strip the purpose of the above-mentioned coat of metal.
Further, one or more during described conducting salt is ammonium nitrate, potassium nitrate, sodium nitrate, calcium nitrate.
The present invention selects the inertia that nitrate adds as improving decoating liquid electric conductivity (electrical conductivity) in stripping process
Strong electrolyte, almost absolutely can be ionized into positive and negative ion in the plating solution.Specifically, the sun that nitrate ionization produces
The deposition potential of ion is the most negative, will not in cathodic reduction, and the anion generated anode oxidizing potential the most just, will not
Oxidized at anode, only take loss out of, therefore there is good electric conductivity.By the effect of conducting salt, it is effectively improved and moves back
Electric conductivity in plating solution, it is possible to be effectively improved the detachment rate of copper coating, reaches to shorten the effect in strip cycle.Because it is electric
Solve in liquid and there is NO3-, react the most as follows:
NO3 -+7H2O+8e→NH4 ++10OH-
NO3 -+10H++8e→NH4 ++3H2O
This reaction consumes H+, thus inhibit H+Reduction process, decrease plating piece surface produce pin hole.The NH simultaneously produced4 +
NH can be provided3, it and the Cu in electric double layer2+Coordinate, thus reduce high current density region Cu2+Sedimentation rate, it is to avoid use
Occur during high current density that phenomenon is burnt in local, thus expand the electric current density upper limit, provide guarantee for improving electrolysis speed.
Meanwhile, NO3-Can also be the oxidant of copper, NO3-Make coated metal dissolve at anode discharge to peel off, thus reach
Strip the purpose of the above-mentioned coat of metal.Simultaneously as nitrate character is more stable, toxicity is relatively low, produces without waste gas, waste water during use
Raw, to equipment non-corrosiveness, meet the requirement that safety and environmental protection produces, simultaneously facilitate transport, storage.
Further, described corrosion inhibiter is Fluohydric acid., triethylamine trihydrofluoride, tetra-n-butyl fluoram Fluohydric acid.
Salt, N, one or more in N-diisopropylethylamine three hydrofluoride.
The corrosion inhibiter that the present invention selects is because the ability combined between hydrogen atom and fluorine atom is the strongest so that Fluohydric acid. exists
Water can not ionize completely, thus form polarity gene, can be by metallic surface charge adsorption, at whole anode and cathode zone
Forming one layer of monomolecular film, thus stop or slow down the generation of electrochemical reaction, suppression magnesium alloy substrate corrosion, is magnesium alloy
Preferable corrosion inhibiter.
Further, during described chelating agent is mannitol, glycerol, propylene glycol, ethylene glycol, sorbitol, xylitol
Plant or several.
The alcohols chelating agent that the present invention uses, it is ensured that do not produce plated metal ion accumulation during strip, it is possible to
Play the effect of purified solution, stablize strip speed, and coated metal is had activation, strip speed can be improved.
Further, described fog inhibitor is Potassium dodecylbenzenesulfonate, DBSA ammonium, DBSA
One or more in sodium, DBSA ferrum.The fog inhibitor that the present invention uses is for suppressing the volatilization of acid mist to produce, main
In decoating liquid to be used for, the suppression of chromium mist, can suppress chromium mist to escape effectively, removes air exhausting device and chromium mist retracting device, protection behaviour from
Make the health of workman.Slow down simultaneously or suppress strong acid radical ion to corrosion of metal, with dichromate ion, there is good collaborative effect
Really, have stable performance, simple to operate, consumption is little, efficiency is high, expense is low, nontoxic odorless, environmentally safe, uses safety
Advantage；Dodecyl benzene sulfonate can also play the capillary effect of reduction simultaneously.
Further, one or more during described buffer agent is sodium acetate, potassium acetate, calcium acetate, magnesium acetate.
Hydrion and metal ion compete reduction on negative electrode so that near negative electrode, the pH of solution is higher than bulk solution.When
When the pH of electrolyte is relatively low, reducing hydrogen ions is more, and current efficiency reduces；When pH is higher, be easily formed the precipitation such as Copper hydrate and
Affect amount of electrolyte, even if electrolyte pH controls in certain scope, if without buffer agent or electric current density the biggest time, also can be
Negative electrode is formed about the precipitations such as Copper hydrate.Additionally, buffer agent can also coordinate chelating agent to play the effect reducing pH value of solution, enter
One step improves the stability of pH value of reaction system.Visible, buffer agent plays very important effect in this process.
Compared with prior art, the method have the advantages that
Contrasting traditional nitric acid and add the magnesium alloy strip layers of copper remover of sulphuric acid, the present invention uses the more excellent electrolysis stripping of technique
Mode, selecting oxidant especially is bichromate, and conducting salt is nitrate, and corrosion inhibiter is the new work of Fluohydric acid. or hydrofluoride
Skill, strip speed fast 1 times than traditional handicraft, strip efficiency has the lifting of matter, and strip is effective, effectively shortens the strip time, joint
Save production cost.
In the present invention due to eliminate the chemical substance of nitric acid and sulphuric acid, first workman produce safety on protected
Barrier；And owing to formula not adding nitric acid, so the pollutants such as tobacco the most also will not be discharged, for
Environmentally friendly remover.
Present invention process is easy to use, low cost, and service life is long, is the best of bad magnesium alloy plating part anti-electricity stripping copper
Select.
Detailed description of the invention
The present invention is described in further detail below in conjunction with embodiment for the ease of it will be appreciated by those skilled in the art that:
Embodiment 1
The present embodiment provides a kind of magnesium alloy release agent for electrolytic, and its raw material includes by weight:
Oxidant: 85 parts；
Conducting salt: 150 parts；
Corrosion inhibiter: 45 parts；
Chelating agent: 16 parts；
Fog inhibitor: 2 parts；
Buffer agent: 55 parts；
Wherein, described oxidant is bichromate, and described conducting salt is nitrate, and described corrosion inhibiter is Fluohydric acid. or Fluohydric acid.
Salt, described chelating agent is alcohol compound, and described fog inhibitor is dodecyl benzene sulfonate, and described buffer agent is acetate.
In the present embodiment, described oxidant is potassium dichromate, and described conducting salt is ammonium nitrate, and described corrosion inhibiter is hydrogen fluorine
Acid, described chelating agent is glycerol, and described fog inhibitor is dodecylbenzene sodium sulfonate, and described buffer agent is sodium acetate.
Embodiment 2
The present embodiment provides a kind of magnesium alloy release agent for electrolytic, and its raw material includes by weight:
Oxidant: 85 parts；
Conducting salt: 100 parts；
Corrosion inhibiter: 45 parts；
Chelating agent: 16 parts；
Fog inhibitor: 2 parts；
Buffer agent: 55 parts；
Wherein, described oxidant is bichromate, and described conducting salt is nitrate, and described corrosion inhibiter is Fluohydric acid. or Fluohydric acid.
Salt, described chelating agent is alcohol compound, and described fog inhibitor is dodecyl benzene sulfonate, and described buffer agent is acetate.
In the present embodiment, described oxidant is potassium dichromate, and described conducting salt is ammonium nitrate, and described corrosion inhibiter is hydrogen fluorine
Acid, described chelating agent is glycerol, and described fog inhibitor is dodecylbenzene sodium sulfonate, and described buffer agent is sodium acetate.
Embodiment 3
The present embodiment provides a kind of magnesium alloy release agent for electrolytic, and its raw material includes by weight:
Oxidant: 85 parts；
Conducting salt: 150 parts；
Corrosion inhibiter: 30 parts；
Chelating agent: 16 parts；
Fog inhibitor: 2 parts；
Buffer agent: 55 parts；
Wherein, described oxidant is bichromate, and described conducting salt is nitrate, and described corrosion inhibiter is Fluohydric acid. or Fluohydric acid.
Salt, described chelating agent is alcohol compound, and described fog inhibitor is dodecyl benzene sulfonate, and described buffer agent is acetate.
In the present embodiment, described oxidant is potassium dichromate, and described conducting salt is ammonium nitrate, and described corrosion inhibiter is hydrogen fluorine
Acid, described chelating agent is glycerol, and described fog inhibitor is dodecylbenzene sodium sulfonate, and described buffer agent is sodium acetate.
Embodiment 4
The present embodiment provides a kind of magnesium alloy release agent for electrolytic, and its raw material includes by weight:
Oxidant: 60 parts；
Conducting salt: 150 parts；
Corrosion inhibiter: 45 parts；
Chelating agent: 16 parts；
Fog inhibitor: 2 parts；
Buffer agent: 55 parts；
Wherein, described oxidant is bichromate, and described conducting salt is nitrate, and described corrosion inhibiter is Fluohydric acid. or Fluohydric acid.
Salt, described chelating agent is alcohol compound, and described fog inhibitor is dodecyl benzene sulfonate, and described buffer agent is acetate.
Described oxidant is sodium dichromate, and described conducting salt is calcium nitrate, and described corrosion inhibiter is triethylamine trihydrofluoride,
Described chelating agent is mannitol, and described fog inhibitor is DBSA ammonium, and described buffer agent is potassium acetate.
Embodiment 5
The present embodiment provides a kind of magnesium alloy release agent for electrolytic, and its raw material includes by weight:
Oxidant: 95 parts；
Conducting salt: 160 parts；
Corrosion inhibiter: 50 parts；
Chelating agent: 18 parts；
Fog inhibitor: 5 parts；
Buffer agent: 60 parts；
Wherein, described oxidant is bichromate, and described conducting salt is nitrate, and described corrosion inhibiter is Fluohydric acid. or Fluohydric acid.
Salt, described chelating agent is alcohol compound, and described fog inhibitor is dodecyl benzene sulfonate, and described buffer agent is acetate.
Described oxidant is potassium dichromate, and described conducting salt is sodium nitrate, and described corrosion inhibiter is DIPEA
Three hydrofluorides, described chelating agent is ethylene glycol, and described fog inhibitor is DBSA ammonium, and described buffer agent is acetic acid
Sodium.
Embodiment 6
The present embodiment provides a kind of magnesium alloy release agent for electrolytic, and its raw material includes by weight:
Oxidant: 65 parts；
Conducting salt: 110 parts；
Corrosion inhibiter: 40 parts；
Chelating agent: 16 parts；
Fog inhibitor: 2 parts；
Buffer agent: 45 parts；
Wherein, described oxidant is bichromate, and described conducting salt is nitrate, and described corrosion inhibiter is Fluohydric acid. or Fluohydric acid.
Salt, described chelating agent is alcohol compound, and described fog inhibitor is dodecyl benzene sulfonate, and described buffer agent is acetate.
Described oxidant is potassium dichromate, and described conducting salt is sodium nitrate, and described corrosion inhibiter is DIPEA
Three hydrofluorides, described chelating agent is ethylene glycol, and described fog inhibitor is DBSA ammonium, and described buffer agent is acetic acid
Sodium.
Embodiment 7
The present embodiment provides a kind of magnesium alloy release agent for electrolytic, and its raw material includes by weight:
Oxidant: 75 parts；
Conducting salt: 140 parts；
Corrosion inhibiter: 45 parts；
Chelating agent: 15 parts；
Fog inhibitor: 2 parts；
Buffer agent: 50 parts；
Wherein, described oxidant is bichromate, and described conducting salt is nitrate, and described corrosion inhibiter is Fluohydric acid. or Fluohydric acid.
Salt, described chelating agent is alcohol compound, and described fog inhibitor is dodecyl benzene sulfonate, and described buffer agent is acetate.
In the present embodiment, described oxidant is potassium dichromate, and described conducting salt is sodium nitrate, and described corrosion inhibiter is four positive fourths
Base fluoram hydrofluoride, described chelating agent is ethylene glycol, and described fog inhibitor is dodecylbenzene sodium sulfonate, described buffer agent
For sodium acetate.
Comparative example 1
This comparative example provides a kind of magnesium alloy release agent for electrolytic, and its raw material includes by weight:
Oxidant: 75 parts；
Conducting salt: 140 parts；
Corrosion inhibiter: 45 parts；
Chelating agent: 15 parts；
Fog inhibitor: 3 parts；
Buffer agent: 50 parts；
In this comparative example, described oxidant is nitric acid, and described conducting salt is sulfate, and described corrosion inhibiter is polyhydroxy aldehyde, described
Chelating agent is glycerol, and described fog inhibitor is dodecyl dimethyl carboxylate methyl ester inhibitor, and described buffer agent is Soluble tartar.
Sodium.
Comparative example 2
This comparative example provides a kind of magnesium alloy release agent for electrolytic, and its raw material includes by weight:
Oxidant: 75 parts；
Conducting salt: 140 parts；
Corrosion inhibiter: 45 parts；
Chelating agent: 15 parts；
Fog inhibitor: 3 parts；
Buffer agent: 50 parts；
In this comparative example, described oxidant is ammonium nitrate, and described conducting salt is calcium pyrophosphate, and described corrosion inhibiter is polyhydroxy aldehyde,
Described chelating agent is glycerol, and described fog inhibitor is dodecyl dimethyl carboxylate methyl ester inhibitor, and described buffer agent is winestone
Acid potassium sodium.
Experimental example
The copper coating that quality is 0.5-1g is plated on the magnesium alloy plate of 1000kg.Use prior art (such as voltage 6-10V, electricity
Current density 10-25A/dm3, negative electrode is magnesium alloy plate), and above-mentioned coating stripping copper liquid medicine copper coating is carried out electrolysis process.Logical
Cross the change of plate quality before and after calculating processes and obtain coating stripping rate.Coefficient of friction between test steel plate.Test electrolytic vessel
Bottom solid sediment quality.Above index test result is three groups of parallel laboratory test result meansigma methodss, its result such as following table institute
Show.
Being more than the wherein specific implementation of the present invention, it describes more concrete and detailed, but can not therefore manage
Solve as the restriction to the scope of the claims of the present invention.It should be pointed out that, for the person of ordinary skill of the art, without departing from
On the premise of present inventive concept, it is also possible to make some deformation and improvement, these obvious alternative forms belong to this
Bright protection domain.
Claims (7)
1. a magnesium alloy release agent for electrolytic, its raw material includes by weight:
Oxidant: 50-100 part；
Conducting salt: 100-180 part；
Corrosion inhibiter: 30-60 part；
Chelating agent: 10-20 part；
Fog inhibitor: 1-5 part；
Buffer agent: 45-60 part；
Wherein, described oxidant is bichromate, and described conducting salt is nitrate, and described corrosion inhibiter is Fluohydric acid. or Fluohydric acid.
Salt, described chelating agent is alcohol compound, and described fog inhibitor is dodecyl benzene sulfonate, and described buffer agent is acetate.
Magnesium alloy release agent for electrolytic the most according to claim 1, it is characterised in that: described oxidant is potassium dichromate, weight
One or more in sodium chromate, Calcium bichromate., Ammonium bichromate..
Magnesium alloy release agent for electrolytic the most according to claim 1, it is characterised in that: described conducting salt is ammonium nitrate, nitric acid
One or more in potassium, sodium nitrate, calcium nitrate.
Magnesium alloy release agent for electrolytic the most according to claim 1, it is characterised in that: described corrosion inhibiter is Fluohydric acid., three second
One or several in amine three hydrofluoride, tetra-n-butyl fluoram hydrofluoride, N, N-diisopropylethylamine three hydrofluoride
Kind.
Magnesium alloy release agent for electrolytic the most according to claim 1, it is characterised in that: described chelating agent be mannitol, the third three
One or more in alcohol, propylene glycol, ethylene glycol, sorbitol, xylitol.
Magnesium alloy release agent for electrolytic the most according to claim 1, it is characterised in that: described fog inhibitor is detergent alkylate sulphur
One or more in acid potassium, DBSA ammonium, dodecylbenzene sodium sulfonate, DBSA ferrum.
Magnesium alloy release agent for electrolytic the most according to claim 1, it is characterised in that: described buffer agent is sodium acetate, acetic acid
One or more in potassium, calcium acetate, magnesium acetate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610468133.0A CN106167914A (en) | 2016-06-24 | 2016-06-24 | A kind of magnesium alloy release agent for electrolytic |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610468133.0A CN106167914A (en) | 2016-06-24 | 2016-06-24 | A kind of magnesium alloy release agent for electrolytic |
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Family
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109778299A (en) * | 2019-02-22 | 2019-05-21 | 江门市瑞期精细化学工程有限公司 | A kind of release agent for electrolytic of iron-based material copper coating layer and preparation method thereof and stripping technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109778299A (en) * | 2019-02-22 | 2019-05-21 | 江门市瑞期精细化学工程有限公司 | A kind of release agent for electrolytic of iron-based material copper coating layer and preparation method thereof and stripping technology |
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