CN109137049A - A kind of easy pole electrophoretic aluminium section production technology being passivated pre-treatment - Google Patents
A kind of easy pole electrophoretic aluminium section production technology being passivated pre-treatment Download PDFInfo
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- CN109137049A CN109137049A CN201811039225.2A CN201811039225A CN109137049A CN 109137049 A CN109137049 A CN 109137049A CN 201811039225 A CN201811039225 A CN 201811039225A CN 109137049 A CN109137049 A CN 109137049A
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/20—Pretreatment
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/44—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for electrophoretic applications
- C09D5/4407—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for electrophoretic applications with polymers obtained by polymerisation reactions involving only carbon-to-carbon unsaturated bonds
- C09D5/4411—Homopolymers or copolymers of acrylates or methacrylates
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/48—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
- C23C22/56—Treatment of aluminium or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/04—Electrophoretic coating characterised by the process with organic material
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Abstract
The invention discloses a kind of easy pole electrophoretic aluminium section production technology for being passivated pre-treatment, the production technology is the following steps are included: hanging up frame for profile, carrying out degreasing degreasing processing, pickling, three pure water series connection cleaning, passivation, major trough electrophoresis, drip-dry, drying to profile.The electrophoresis production technology provided by the invention, it can replace the chromic acid salt treatment process being gradually forbidden to use, it is applicable in each aluminium alloy extrusions manufacturer, the chromium-free deactivation film layer of preparation, film layer colloid is fine and close, with fine corrosion resistance, with the adhesion of profile base and electrodeposited paint film is good, uniform film thickness；Simultaneously by adjusting the electrophoretic paint and operating method of electrophoresis tank, it eliminates anodic oxidation and colours this two high energy consumption processes, not only energy conservation and environmental protection, the discharge for reducing waste water, also greatly shortens the production time, it is processed after section quality stablize, superficial film corrosion resistance is high, weather-proof length, surface color and polish is more, and fitment material for family selectivity is high.
Description
Technical field
The present invention relates to the technical field of surface of aluminum profile, and in particular to a kind of easy pole electrophoresis aluminium for being passivated pre-treatment
Profile production technology.
Background technique
With flourishing for national economy, currently, China is aluminium consumption big country.Aluminum profile is often adopted before electrophoretic painting
Pre-treatment is carried out with chromate chemical deactivation method, but hexavalent chromium has carcinogenesis, processing to human body in chromic acid salt treatment
It is improper that serious pollution can be caused to environment, therefore chromating technique is greatly paid close attention to, some countries have limited it
It uses.Recent domestic has conducted extensive research non-chromium inactivating technique, develop rare earth, cobalt salt, silicate, molybdic acid, titanium/
A variety of passivating solution system for handling such as zirconates have certain corrosion resistance.But passivation effect still can have passivating film not
Enough uniform, compactness is inadequate, poor adhesive force, and the not ideal enough disadvantage of corrosion resistance needs to improve.
Passivation operation belongs to the step before electrophoretic painting in pretreatment, and pretreated profile generally will also pass through anode
How the main techniques such as oxidation-coloring-electrophoresis-drying are guaranteeing to produce as the environmental protection of people is constantly reinforced with awareness of saving energy
Under the premise of quality, some high energy consumption processes in the preparation process of aluminium alloy extrusions are reduced, to reach environmental protection and energy saving
Purpose is also numerous researchers problem to be solved.
Summary of the invention
The object of the invention is to one of in order to solve the defects of prior art, provide a kind of Yi Ji electricity for being passivated pre-treatment
Swimming production process of aluminium section.
The present invention provides a kind of easy pole electrophoretic aluminium section production technology for being passivated pre-treatment, the production technology includes such as
Lower step:
(1) bridging
Profile is hung up into frame, profile is washed；
(2) degreasing degreasing
Degreasing degreasing processing is carried out to the profile after washing；
(3) pickling
The described profile of step (2) after processed is put into descaling bath, further removes the Surface of profile greasy dirt, oxidation
Film；
The series connection cleaning of (4) three pure water
The series connection cleaning of three pure water is used to the described profile of step (3) after processed；
Wherein: first of pure water conductivity is less than 1500us/cm；
Second pure water conductivity is less than or equal to 200us/cm；PH is more than or equal to 4.5；
Third road pure water conductivity is less than or equal to 80us/cm, and PH is more than or equal to 5.0；
(5) it is passivated
The described profile of step (4) after processed is put into deactivation slot and is passivated processing, makes the Surface of profile shape
At the thick uniform colourless chemical composition coating of a tunic；
Wherein, the main component in the deactivation slot is nanometer plating solution, and the nanometer plating solution is by nanocrystal silicon, tartaric acid, second
Acid, ethyl alcohol, vitamin and cerium composition；
(6) major trough electrophoresis
The described profile of step (5) after processed is put into electrophoresis major trough, has electrophoretic paint in electrophoresis tank, profile is totally submerged
Be powered japanning after 30-90s, colouring；
Wherein, the electrophoretic paint includes following raw material: acrylic acid, methyl methacrylate, butyl acrylate, metering system
Sour hydroxyl ethyl ester, glycerin monomethyl acrylic ester, trimethylol-propane trimethacrylate, ethoxyquin trimethylolpropane tris first
Base acrylate and ethoxylated bisphenol A dimethylacrylate；
(7) drip-dry
By the profile drip-dry after washing of step (6) after processed, profile has certain gradient in drip-dry area；
(8) it dries
Profile after drip-dry is put into drying oven and is dried, the profile is placed in the cooling of the area Xie Jia after drying, so
After unload frame the profile be made.
Preferably, in the step (5), the concentration of nanometer plating solution is 1-2%, tank liquor total acid in slot in the passivation tank liquor
Less than or equal to 6, PH:3.1-3.6, passivation time: 30-60s, aluminium ion concentration are less than or equal to 1.5g/L, and conductivity is more than or equal to
200, zirconium ion: 20-60mg/L.
Preferably, it is 6-8g/L that solid ingredient is painted in the step (6), in the electrophoresis tank, and toner 1-3kg, PH are
5.8-8.0, amine value 0.2-0.4,350-1000us/cm, time 60- when electrophoresis temperature is 20-30 DEG C, 25 DEG C of conductivity
220s, voltage 90-180V.
Preferably, the electrophoretic paint each component includes: acrylic acid 2-4%, methyl methacrylate by weight percentage
10-20%, butyl acrylate 20-30%, hydroxyethyl methacrylate 6-10%, glycerin monomethyl acrylic ester 6.5-
12.5%, trimethylol-propane trimethacrylate 3-7%, ethoxyquin trimethylol-propane trimethacrylate 5-9%
With ethoxylated bisphenol A dimethylacrylate 2.5-6.5%.
It preferably, further include polymerization reaction buffering solvent, amino resins, the tertiary fourth of perbenzoic acid in the electrophoretic paint
Ester and chromium sulfate.
Preferably, the buffering solvent includes isopropanol and ethylene glycol ethyl ether.
Preferably, in the electrophoretic paint by weight percentage, the isopropanol be 1-3%, ethylene glycol ethyl ether 1-3%,
Amino resins 10-24%, peroxidized t-butyl perbenzoate 0.8-1.6% and chromium sulfate 1.2-2.4%.
Preferably, in the step (2), tank liquor is formed in degreasing degreasing slot are as follows: free acid point: 15-70, aluminium ion are dense
Degree: less than 3.5g/L, tank liquor temperature: 0-40 DEG C, degreasing time: 2-5min.
Preferably, in the step (3), tank liquor is formed in the descaling bath are as follows: free acid point: 20-70, aluminium ion:
Less than 3.5g/L, tank liquor temperature: room temperature, pickling time: 2.5-5min.
Preferably, in the step (5), the content of zirconium ion presses colorimetric in the chemical composition coating that the Surface of profile is formed
It is 1.0-5.0mg/m when method measures2, it is 20-150mg/m when being measured by weight-loss method2。
The beneficial effects of the present invention are: a kind of easy pole electrophoretic aluminium section production technology of passivation pre-treatment of the invention,
After the passivated processing of profile formed colloid densification chromium-free deactivation film layer, the passivation film with fine corrosion resistance,
With the adhesion of profile base and electrodeposited paint film is good, uniform film thickness, high production efficiency, section small to aluminium Influence of Fatigue Properties
The advantages that about energy consumption, environmental pollution is few, can replace the chromic acid salt treatment process being gradually forbidden to use, and can be widely used for aluminium conjunction
The surface treatment of metal type material, aluminium sheet, aluminium alloy castings and Al-alloy products.
Meanwhile the processing technology by changing electrophoresis process, the electrophoretic paint and operating method of electrophoresis tank are adjusted, sun is eliminated
Pole aoxidizes and colours this two high energy consumption processes, and not only energy conservation and environmental protection, reduces the discharge of waste water, also greatly shortens production
Time, it is processed after section quality stablize, superficial film corrosion resistance is high, and weather-proof length, surface color and polish is more, fitment material for family selection
Property it is high.
Specific embodiment
Below with reference to embodiment, the present invention is described in further detail, and embodiments of the present invention are not limited thereto.
A kind of easy pole electrophoretic aluminium section production technology for being passivated pre-treatment of embodiment 1, the production technology include following step
It is rapid:
(1) bridging
Profile is hung up into frame, profile is washed；
Bridging is that profile to be processed is hung up frame, according to plan scheduled production monokaryon to the model, length, number of profile whether
Be consistent, determine it is errorless after can restocking, the profile of different colours does not allow as far as possible while feeding, the type of same color difference odd numbers
Material, which is fitted together, must carry out mark, stringent to distinguish.
Non-woven fabric gloves operation need to be worn when feeding, forbid having impression of the hand and footprint to step on profile.It should handle with care when material lift, profile
It keeps a fixed spacing, be uniformly distributed, separate, guarantee there are enough gaps between profile, it is ensured that tank liquor flows smoothly, and guarantees passivation
Effect.
(2) degreasing degreasing
Degreasing degreasing processing is carried out to the profile after washing, degreasing degreasing processing is to remove Surface of profile oil
Dirty, oxidation film, Surface of profile cleans when guaranteeing to enter descaling bath；
Wherein, tank liquor forms in degreasing degreasing slot are as follows: free acid point: 15-70, aluminium ion concentration: less than 3.5g/L, tank liquor
Temperature: 0-40 DEG C, degreasing time: 2-5min；
As stacked too long with the serious profile of surface dirt, it should suitably slow down chain speed depending on specific deoiling effect, oil removing
Surface of profile has to clean light afterwards, otherwise will have a direct impact on passivation effect；
It is analyzed once by lab technician within free acid per tour 3-4 hours, measurement aluminium ion is primary daily, and technique person will be according to analysis
As a result it is adjusted, irregularly clears up liquid level greasy dirt, according to deoiling effect, Surface of profile brightness, cleannes and cross doses, determine
Whether slot or replacement tank liquor.The slot that at least falls every month produced doses while according to aluminium point, free acid testing result
About 1-2 months, i.e., tank liquor when about 2000T produced doses about 4 months, i.e., when about 5000T replaces tank liquor.
(3) pickling
The described profile of step (2) after processed is put into descaling bath, further removes the Surface of profile greasy dirt, oxidation
Film increases profile surface cleanness, brightness, accelerates film speed on passivating film；
Wherein, tank liquor forms in the descaling bath are as follows: free acid point: 20-70, aluminium ion: less than 3.5g/L, tank liquor temperature
Degree: room temperature, pickling time: 2.5-5min；Wherein, room temperature are as follows: 20-30 DEG C.
Analysis in free acid per tour 3-4 hours is primary, and measurement aluminium ion is primary daily, and technique person will carry out based on the analysis results
Liquid level greasy dirt is irregularly cleared up in adjustment, according to deoiling effect, Surface of profile brightness, cleannes and is crossed doses, is decided whether down
Slot or replacement tank liquor.It at least falls a slot every month, while according to aluminium point, free acid testing result, producing doses about 1-2
Month, i.e., tank liquor when about 2000T produced doses about 4 months, i.e., when about 5000T replaces tank liquor.
The etching degree of technical staff's per tour detection degreasing degreasing slot and the profile in descaling bath, it is desirable that etch amount
The three pure water series connection cleaning step of next step is carried out when more than or equal to 0.50g/ ㎡；When etch amount is lower than 0.50g/ ㎡,
Degreaser and mordant are added in time, wherein one class of the technical staff 8 hours.
In the present invention, degreasing, acid pickling step can sufficiently remove the Surface of profile greasy dirt, oxidation film, increase the profile
Cleannes, the brightness on surface accelerate film speed on passivating film.
The series connection cleaning of (4) three pure water
The series connection cleaning of three pure water is used to the described profile of step (3) after processed；
Wherein: first of pure water conductivity is less than 1500us/cm, and pure water washes 1-2min；
Second pure water conductivity is less than or equal to 200us/cm, and PH is more than or equal to 4.5, and pure water washes 1-2min；
Third road pure water conductivity is less than or equal to 80us/cm, and PH is more than or equal to 5.0, and pure water washes 1-3min.
Wherein, whether per tour analysis second pure water PH and conductivity are qualified, if pure water parameters are unqualified, then replace PH
With the pure water of conductivity qualification.
(5) it is passivated
The described profile of step (4) after processed is put into deactivation slot and is passivated processing, makes the Surface of profile shape
At the thick uniform colourless chemical composition coating of a tunic；
Wherein, the main component in the deactivation slot is nanometer plating solution, and the nanometer plating solution is by nanocrystal silicon, tartaric acid, second
Acid, ethyl alcohol, vitamin and cerium composition, the nanometer plating solution each component is nanocrystal silicon 20-35%, tartaric acid by weight percentage
10-15%, acetic acid 10-15%, ethyl alcohol 15-20%, vitamin 5-15% and cerium 3-9%, the vitamin include vitamin A,
Vitamin B and vitamin C, the cerium are nano-cerium oxide.
The concentration of nanometer plating solution is 1-2% in tank liquor, and tank liquor total acid is less than or equal to 6, PH:3.1-3.6 in slot, when processing
Between: 30-60s, aluminium ion concentration are less than or equal to 1.5g/L, and conductivity is more than or equal to 200, zirconium ion: 20-60mg/L, processing temperature
Degree: room temperature, wherein room temperature are as follows: 20-30 DEG C.
It wherein, is 1.0- when the content of zirconium ion presses colorimetric method for determining in the chemical composition coating that the Surface of profile is formed
5.0mg/m2, it is 20-150mg/m when being measured by weight-loss method2；
The passivation tank liquor periodic filtering, every time 100 tons of filtering；An every three hours tank liquor PH of analysis and conductivity, often
Detect a tank liquor aluminium ion concentration and total acid week, tank liquor must periodic filtering.According to film effect, detection film weight on Surface of profile
With doses excessively, decide whether down slot or replacement tank liquor.It is adjusted based on the analysis results, produced doses about 1~2 month, i.e.,
About 2000T falls a tank liquor, produces doses about 4 months, i.e., when about 5000T replaces tank liquor.
(6) major trough electrophoresis
The profile of step (5) after processed is slowly put into electrophoresis major trough, has electrophoretic paint in electrophoresis tank, profile is totally submerged
Be powered japanning after 30-90s, colouring, and it is 6-8g/L, toner 1-3kg, PH 5.8-8.0, amine that solid ingredient is painted in the electrophoresis tank
Value is 0.2-0.4,350-1000us/cm, time 60-220s, voltage 90- when electrophoresis temperature is 20-30 DEG C, 25 DEG C of conductivity
180v；
Wherein, the electrophoretic paint each component includes: AA: acrylic acid, MMA: methyl methacrylate, BA: butyl acrylate,
HEMA: hydroxyethyl methacrylate, GMMA: glycerin monomethyl acrylic ester, TMPTMA: trimethylol propane trimethyl acrylic acid
Ester, TMP (3EO) TMA: ethoxyquin trimethylol-propane trimethacrylate and E30BADMA: ethoxylated bisphenol A dimethyl propylene
Olefin(e) acid ester；
The electrophoretic paint each component include: by weight percentage AA2-4%, MMA10-20%, BA20-30%,
HEMA6-10%, GMMA6.5-12.5%, TMPTMA3-7%, TMP (3EO) TMA5-9% and E30BADMA2.5-6.5%；
It further include polymerization reaction buffering solvent, amino resins, TBPB: peroxidized t-butyl perbenzoate in the electrophoretic paint
And BCS: chromium sulfate；
The buffering is IPA with solvent: isopropanol and ECS: ethylene glycol ethyl ether；
By weight percentage, the electrophoretic paint include IPA1-3%, ECS1-3%, amino resins 10-24%,
TBPB0.8-1.6% and BCS1.2-2.4%；
Specifically, the electrophoretic paint the preparation method comprises the following steps: by corresponding proportion by AA, MMA, BA, HEMA, GMMA, TMPTMA,
TMP (3EO) TMA, E30BADMA, TBPB and BCS is in appropriate polymerization reaction buffering solvent: polymerization reaction occurs in IPA and ECS
After 8-16h, DMAE is added when being cooled to 50-80 DEG C: dimethylaminoethanol, saponification is at being added amino resins after water solubility
Crosslinking agent, adds solvent adjustment viscosity and solid content is sufficiently stirred after 2-6h and obtains the electrophoretic paint, adjustment viscosity with admittedly
Solvent used in content is that polymerization reaction buffering uses solvent.
(7) drip-dry
By the profile drip-dry after washing of step (6) after processed, profile has certain gradient in drip-dry area；
(8) it dries
Profile after drip-dry is put into drying oven and is dried, the profile is placed in the cooling of the area Xie Jia after drying, so
After unload frame the profile be made, wherein drying temperature is 80-100 DEG C, drying time 20-30min.
In the present invention in the passivation operation of profile, using without poisonous and harmful substance environmentally friendly passivating solution come replace chromaking and
The passivating solution of phosphatization at room temperature can be handled profile, and uniform, fine and close film layer is formed in workpiece surface, the passivation
Film layer have fine corrosion resistance, with the adhesion of profile base and electrodeposited paint film is good, uniform film thickness, high production efficiency,
The advantages that, energy saving small to aluminium Influence of Fatigue Properties, environmental pollution is few, poisonous and hazardous chromaking and phosphatization can be replaced
Passivation liquor treating process, at the surface that can be widely used for aluminium alloy extrusions, aluminium sheet, aluminium alloy castings and Al-alloy products
Reason.
Meanwhile in electrophoresis step, the preparation of electrophoretic paint adds multiple more officials using traditional acrylic monomers in electrophoresis tank
The paint film on Surface of profile can be made to form more reticular structures when being crosslinked after the reasonable interworking synthesis of high-performance acrylic acid monomer of base, it is convex
Dominant can be high rigidity, high glaze, high adhesion force, the excellent water-soluble electrophoretic paint of chemical-resistance, so that aluminium workpiece is not necessarily to
By the high pollution of Conventional process, the oxidation of high energy consumption, tinting steps, can still have and identical even preferably adhere to
Power and weather resistance fully demonstrate energy-saving and environment-friendly operation objective, save considerable cost for enterprise, also provide for operating staff
Better working environment.
Embodiment 2
On the basis of embodiment 1, the present embodiment 2 proposes a kind of easy pole electrophoretic aluminium section production work for being passivated pre-treatment
Skill, wherein in the step (2), tank liquor is formed in degreasing degreasing slot are as follows: free acid point: 43, aluminium ion concentration: less than 3.5g/
L, tank liquor temperature: 25 DEG C, degreasing time: 3.5min；
In the step (3), tank liquor is formed in the descaling bath are as follows: free acid point: 45, aluminium ion: less than 3.5g/L, and slot
Liquid temperature: 25 DEG C, pickling time: 4min；
In the step (4), first of pure water washes 1.5min, and second pure water washes 1.5min, and third road pure water washes 2min；
In the step (5), the concentration of nanometer plating solution is 1.5% in the passivation tank liquor, and tank liquor total acid is less than or equal to 6,
PH:3.4 handles the time: 45s, and aluminium ion concentration is less than or equal to 1.5g/L, and conductivity is more than or equal to 200, zirconium ion: 40mg/L,
Treatment temperature: 25 DEG C；
It is 3.0mg/m when the content of zirconium ion presses colorimetric method for determining in the chemical composition coating that the Surface of profile is formed2, press
It is 85mg/m when weight-loss method measures2。
In the step (6), the profile is totally submerged after 60s the japanning that is powered, colouring, paints solid ingredient in the electrophoresis tank
For 6g/L, toner 1kg, PH 5.8, amine value 0.2, electrophoresis temperature is 20-30 DEG C, conductivity 350-600us/cm, when
Between 220s, voltage 90v；
Wherein, the electrophoretic paint each component includes: AA 3%, MMA 15%, BA 25%, HEMA by weight percentage
8%, GMMA 9.5%, TMPTMA 5%, TMP (3EO) TMA 7%, E30BADMA4.5%, IPA1.5%, ECS1.5%, ammonia
Base resin 17%, TBPB 1.2% and BCS1.8%；
Specifically, the electrophoretic paint the preparation method comprises the following steps: by corresponding proportion by AA, MMA, BA, HEMA, GMMA, TMPTMA,
TMP (3EO) TMA, E30BADMA, TBPB and BCS is in appropriate polymerization reaction buffering solvent: it is anti-that polymerization occurring in IPA and ECS
After answering 12h, DMAE is added when being cooled to 65 DEG C: dimethylaminoethanol, saponification are handed at addition amino resins after water solubility
Join agent, adds solvent adjustment viscosity and solid content is sufficiently stirred after 4h and obtains the electrophoretic paint, adjust viscosity and solid content
Solvent used is that polymerization reaction buffering uses solvent.
In the step (8), the drying temperature is 90 DEG C, and drying temperature obtains the profile after being 25min.
Embodiment 3
On the basis of embodiment 1, the present embodiment 3 proposes a kind of easy pole electrophoretic aluminium section production work for being passivated pre-treatment
Skill, wherein in the step (2), tank liquor is formed in degreasing degreasing slot are as follows: free acid point: 70, aluminium ion concentration: less than 3.5g/
L, tank liquor temperature: 1 DEG C, degreasing time: 5min；
In the step (3), tank liquor is formed in the descaling bath are as follows: free acid point: 70, aluminium ion: less than 3.5g/L, and slot
Liquid temperature: 20 DEG C, pickling time: 5min；
In the step (4), first of pure water washes 2min, and second pure water washes 2min, and third road pure water washes 3min；
In the step (5), the concentration of nanometer plating solution is 2% in the passivation tank liquor, and tank liquor total acid is less than or equal to 6, PH:
3.1, the time: 30s is handled, aluminium ion concentration is less than or equal to 1.5g/L, and conductivity is more than or equal to 200, zirconium ion: 60mg/L, place
Reason temperature: 20 DEG C；
It is 5.0mg/m when the content of zirconium ion presses colorimetric method for determining in the chemical composition coating that the Surface of profile is formed2, press
It is 150mg/m when weight-loss method measures2。
In the step (6), the profile is totally submerged after 30s the japanning that is powered, colouring, paints solid ingredient in the electrophoresis tank
For 7g/L, toner 2kg, PH 7.0, amine value 0.3, electrophoresis temperature is 20-30 DEG C, conductivity 600-800us/cm, when
Between 140s, voltage 140v, wherein electrophoretic paint described in the present embodiment 3 raw material composition with proportion and preparation method with reality
Apply the identical of example 2.
In the step (8), the drying temperature is 100 DEG C, and drying temperature obtains the profile after being 30min.
Embodiment 4
On the basis of embodiment 1, the present embodiment 4 proposes a kind of easy pole electrophoretic aluminium section production work for being passivated pre-treatment
Skill, wherein in the step (2), tank liquor is formed in degreasing degreasing slot are as follows: free acid point: 15, aluminium ion concentration: less than 3.5g/
L, tank liquor temperature: 40 DEG C, degreasing time: 2min；
In the step (3), tank liquor is formed in the descaling bath are as follows: free acid point: 20, aluminium ion: less than 3.5g/L, and slot
Liquid temperature: 30 DEG C, pickling time: 2.5min；
In the step (4), first of pure water washes 1min, and second pure water washes 1min, and third road pure water washes 1min；
In the step (5), the concentration of nanometer plating solution is 1% in the passivation tank liquor, and tank liquor total acid is less than or equal to 6, PH:
3.6, the time: 60s is handled, aluminium ion concentration is less than or equal to 1.5g/L, and conductivity is more than or equal to 200, zirconium ion: 20mg/L, place
Reason temperature: 30 DEG C；
It is 1.0mg/m when the content of zirconium ion presses colorimetric method for determining in the chemical composition coating that the Surface of profile is formed2, press
It is 20mg/m when weight-loss method measures2。
In the step (6), the profile is totally submerged after 90s the japanning that is powered, colouring, paints solid ingredient in the electrophoresis tank
For 8g/L, toner 2kg, PH 8.0, amine value 0.4, electrophoresis temperature is 20-30 DEG C, conductivity 800-1000us/cm, when
Between 60s, voltage 180v, wherein electrophoretic paint described in the present embodiment 4 raw material composition with proportion and preparation method with implementation
Example 2 it is identical.
In the step (8), the drying temperature is 80 DEG C, and drying temperature obtains the profile after being 20min.
Comparative example
The main component nanometer plating solution for being passivated tank liquor is substituted for chromate, content is with embodiment 2, and other parameters and place
It is same as Example 2 to manage step.
The performance test for the profile that embodiment 2-4 and comparative example in the present invention is handled is compareed such as one institute of following table
Show:
Table one
The adhesive force and corrosion resistance for the profile that embodiment 2-4 is handled it can be seen from above-mentioned table one are superior to
The profile handled in comparative example, while there is superior water resistance；By the test result of embodiment 2-4 it is found that at this
The profile obtained under the production technology processing that invention proposes, all has stronger adhesive force, corrosion resistance, water resistance, surface shape
At hardness of paint film also reach 3H or more, uniform color is bright-coloured colorful, and compared with comparative example, the present invention uses chromium-free deactivation
Liquid also has the advantages that environmental protection and energy saving on the basis of adhesion performance and stronger corrosion resistance.Wherein, embodiment 2 is this
Preferred embodiment in invention.
In conclusion under the Passivation Treatment of the passivation technology parameter proposed in the present invention, in the nothing that Surface of profile is formed
The colloid of color passivating film, the passivating film is fine and close, and uniform film thickness has excellent corrosion resistance, can be with profile base and electricity
Between swimming paint film there is good adhesive force to have the advantages that environmental protection and energy saving due to using chromium-free passivation liquid；Meanwhile it is logical
The electrophoretic paint and operating method for crossing adjustment electrophoresis tank eliminate anodic oxidation and colour this two high energy consumption processes, save energy consumption
And cost, also reduce the discharge of waste water, it is processed after section quality stablize, superficial film corrosion resistance is high, weather-proof length, table
Complexion is color more, and fitment material for family selectivity is high.
It should be noted that embodiment described above for explaining only the invention, is not constituted to of the invention any
Limitation.If not departing from the spirit and scope of the present invention to various changes or modifications of the invention, if these modification and variations
Belong within the scope of claim and equivalent technologies of the invention, then the present invention is also intended to encompass these modification and variations.
Claims (10)
1. a kind of easy pole electrophoretic aluminium section production technology for being passivated pre-treatment, which is characterized in that the production technology includes as follows
Step:
(1) bridging
Profile is hung up into frame, profile is washed；
(2) degreasing degreasing
Degreasing degreasing processing is carried out to the profile after washing；
(3) pickling
The described profile of step (2) after processed is put into descaling bath, further removes the Surface of profile greasy dirt, oxidation film；
The series connection cleaning of (4) three pure water
The series connection cleaning of three pure water is used to the described profile of step (3) after processed；
Wherein: first of pure water conductivity is less than 1500us/cm；
Second pure water conductivity is less than or equal to 200us/cm；PH is more than or equal to 4.5；
Third road pure water conductivity is less than or equal to 80us/cm, and PH is more than or equal to 5.0；
(5) it is passivated
The described profile of step (4) after processed is put into deactivation slot and is passivated processing, the Surface of profile is made to form one
The thick uniform colourless chemical composition coating of tunic；
Wherein, the main component in the deactivation slot is nanometer plating solution, and the nanometer plating solution is by nanocrystal silicon, tartaric acid, acetic acid, second
Alcohol, vitamin and cerium composition；
(6) major trough electrophoresis
The described profile of step (5) after processed is put into electrophoresis major trough, has electrophoretic paint in electrophoresis tank, profile is totally submerged 30-
Be powered japanning after 90s, colouring；
Wherein, the electrophoretic paint includes following raw material: acrylic acid, methyl methacrylate, butyl acrylate, hydroxyethyl methacrylate
Ethyl ester, glycerin monomethyl acrylic ester, trimethylol-propane trimethacrylate, ethoxyquin trimethylol propane trimethyl third
Olefin(e) acid ester and ethoxylated bisphenol A dimethylacrylate；
(7) drip-dry
By the profile drip-dry after washing of step (6) after processed, profile has certain gradient in drip-dry area；
(8) it dries
Profile after drip-dry is put into drying oven and is dried, the profile is placed in the cooling of the area Xie Jia after drying, is then unloaded
The profile is made in frame.
2. a kind of easy pole electrophoretic aluminium section production technology for being passivated pre-treatment according to claim 1, which is characterized in that institute
It states in step (5), the concentration of nanometer plating solution is 1-2% in the deactivation slot, and tank liquor total acid is less than or equal to 6, PH:3.1- in slot
3.6, passivation time: 30-60s, aluminium ion concentration are less than or equal to 1.5g/L, and conductivity is more than or equal to 200, zirconium ion: 20-
60mg/L。
3. a kind of easy pole electrophoretic aluminium section production technology for being passivated pre-treatment according to claim 1, which is characterized in that institute
It states in step (6), it is 6-8g/L, toner 1-3kg, PH 5.8-8.0, amine value 0.2- that solid ingredient is painted in the electrophoresis tank
0.4,350-1000us/cm, time 60-220s, voltage 90-180V when electrophoresis temperature is 20-30 DEG C, 25 DEG C of conductivity.
4. a kind of easy pole electrophoretic aluminium section production technology for being passivated pre-treatment according to claim 3, which is characterized in that institute
Stating electrophoretic paint each component by weight percentage includes: acrylic acid 2-4%, methyl methacrylate 10-20%, butyl acrylate
20-30%, hydroxyethyl methacrylate 6-10%, glycerin monomethyl acrylic ester 6.5-12.5%, trimethylolpropane tris first
Base acrylate 3-7%, ethoxyquin trimethylol-propane trimethacrylate 5-9% and ethoxylated bisphenol A dimethyl allene
Acid esters 2.5-6.5%.
5. a kind of easy pole electrophoretic aluminium section production technology for being passivated pre-treatment according to claim 4, which is characterized in that institute
State in electrophoretic paint further includes polymerization reaction buffering solvent, amino resins, peroxidized t-butyl perbenzoate and chromium sulfate.
6. a kind of easy pole electrophoretic aluminium section production technology for being passivated pre-treatment according to claim 5, which is characterized in that institute
Stating buffering solvent includes isopropanol and ethylene glycol ethyl ether.
7. a kind of easy pole electrophoretic aluminium section production technology for being passivated pre-treatment according to claim 6, which is characterized in that institute
It states in electrophoretic paint by weight percentage, the isopropanol is 1-3%, ethylene glycol ethyl ether 1-3%, amino resins 10-24%, mistake
Aoxidize t-butyl perbenzoate 0.8-1.6% and chromium sulfate 1.2-2.4%.
8. a kind of easy pole electrophoretic aluminium section production technology for being passivated pre-treatment according to claim 1, which is characterized in that institute
It states in step (2), tank liquor forms in degreasing degreasing slot are as follows: free acid point: 15-70, aluminium ion concentration: less than 3.5g/L, tank liquor
Temperature: 0-40 DEG C, degreasing time: 2-5min.
9. a kind of easy pole electrophoretic aluminium section production technology for being passivated pre-treatment according to claim 1, which is characterized in that
In the step (3), tank liquor is formed in the descaling bath are as follows: free acid point: 20-70, aluminium ion: less than 3.5g/L, tank liquor temperature
Degree: room temperature, pickling time: 2.5-5min.
10. a kind of easy pole electrophoretic aluminium section production technology for being passivated pre-treatment according to claim 1, which is characterized in that
It is 1.0- when the content of zirconium ion presses colorimetric method for determining in the chemical composition coating that the Surface of profile is formed in the step (5)
5.0mg/m2, it is 20-150mg/m when being measured by weight-loss method2。
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| CN201811039225.2A CN109137049B (en) | 2018-09-06 | 2018-09-06 | Production process of easy-electrode electrophoresis aluminum profile subjected to passivation pretreatment |
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| CN109137049B (en) | 2020-10-09 |
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