CN108103515A - A kind of processing method of aluminium alloy - Google Patents
A kind of processing method of aluminium alloy Download PDFInfo
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- CN108103515A CN108103515A CN201711425614.4A CN201711425614A CN108103515A CN 108103515 A CN108103515 A CN 108103515A CN 201711425614 A CN201711425614 A CN 201711425614A CN 108103515 A CN108103515 A CN 108103515A
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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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/22—Light metals
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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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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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
- C09D5/08—Anti-corrosive paints
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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
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/30—Electroplating: Baths therefor from solutions of tin
- C25D3/32—Electroplating: Baths therefor from solutions of tin characterised by the organic bath constituents used
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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
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
- C25D5/42—Pretreatment of metallic surfaces to be electroplated of light metals
- C25D5/44—Aluminium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The present invention relates to a kind of processing methods of aluminium alloy, belong to aluminum alloy processing technology field.It specifically includes：By aluminium alloy semi-finished product with Na2CO3With the mixed liquor of lauric acid amide of ethanol alkaline ungrease treatment is first carried out for degreaser, then tin liquor is reasonably electroplated with compatibility and carries out electrotinning processing, finally aluminum alloy surface after plating coats one layer of modified epoxy, wherein, plating tin liquor when electrotinning is handled includes SnSO420 40%, imidazoline Sodium Dicarboxylic Acid 3 20%, 1,10 phenanthrolenes 5 20%, sodium gluconate 3 10%, sodium citrate 3 10%, carbon particle 0.5 3%.The present invention further improves the wearability and corrosion resistance of aluminium alloy by multiple protective.
Description
Technical field
The present invention relates to a kind of processing methods of aluminium alloy, belong to aluminum alloy processing technology field.
Background technology
Aluminium alloy have density is small, specific strength and specific stiffness are higher, plasticity is good, various section bars can be processed into, have it is excellent
Electric conductivity, thermal conductivity and corrosion stability, a series of good characteristics such as shock resistance and quite high recycling rate, regeneration rate,
Therefore the common concern of people is received.Aluminium alloy is widely used in all trades and professions at present, such as manufactures wanting for aerospace vehicle
Seek the parts that compressive yield strength is high, naval vessels, automobile, Cryo Equipment, television tower, drilling rig, transporting equipment, are led at aircraft
Playing parts and deck etc. needs the occasion of high corrosion stability, good solderability and moderate strength, because of its good shaping
Processing performance, corrosion stability, candle property, fatigue strength and medium static strength and being used for manufacture fuel tanker, oil pipe and
The sheet metal component of vehicular traffic, ship, instrument, street lamp stent and rivet, hardware etc..
With the fast development of aluminium alloy industry, the requirement to its processing technology is also higher and higher.It generally uses at present
Processing technology has and makes alloy surface alloying by means such as laser, argon arc, electric spark overlayings；With plasma spraying, electrochemistry
Alloy surface cladding method based on method；Electron-beam Modified etc. is now carried out by the rapid cooling technique pairing golden watch of cold conditions matrix.
The oxidization burning loss of alloy is serious during surface alloying, and it is special that single spraying or electrochemical treatments are unable to meet some
Requirement of the field to aluminum alloy materials anticorrosive wear-resistant performance, therefore develop and screen a kind of novel aluminum alloy processing technology and seem
It is particularly important.
The content of the invention
The purpose of the present invention is being directed to the above-mentioned problems in the prior art, a kind of processing method of aluminium alloy is provided,
The aluminium alloy processed by this method has preferable corrosion resistance and wearability.
The purpose of the present invention can be realized by following technical proposal：A kind of processing method of aluminium alloy, the processing
Method includes the following steps：By the first alkaline ungrease treatment of aluminium alloy semi-finished product, electrotinning processing is then carried out, after plating finally
Aluminum alloy surface coat one layer of modified epoxy.
The processing method that the present invention uses is, by the first alkaline ungrease treatment of aluminium alloy semi-finished product, removing aluminum alloy surface adheres to
Fatty grease, fatty grease is unfavorable for alloy and is come into full contact with electroplate liquid, and can pollute electroplate liquid, it is necessary to remove, then will
Aluminium alloy semi-finished product after ungrease treatment carry out electrotinning processing, obtain non-toxic, easily welding, corrosion-resistant, resistance to discoloration tin plating
Layer, the and because presence of pre-treatment alkalescence degreasing, make its tin coating have in alloy material surface be firmly combined with, be bright, is fine and close,
Uniformly, the advantages that continuous.And the present invention also coats modified epoxy on tin coating surface, modified epoxy has long-term protect
Shield acts on, and is impregnated in water, can continuing to cure, has splendid antikathode stripping performance, although modified epoxy coating is sudden and violent
It is exposed in atmospheric environment and just occurs dusting and to fade, but this phenomenon does not interfere with Corrosion Protection, in summary factor,
Invention selection carries out duplicate protection coated in electrotinning layer surface with modified epoxy resin to aluminum alloy materials, further improves
The wearability and corrosion resistance of aluminium alloy.
In the processing method of above-mentioned aluminium alloy, temperature is 35 DEG C -40 DEG C during alkaline ungrease treatment, continues degreasing time and is
10-15min。
In the processing method of above-mentioned aluminium alloy, the degreaser in alkaline ungrease treatment is Na2CO3With surfactant
Mixed liquor, wherein Na2CO3The 15-20% of degreaser gross mass is accounted for, surfactant accounts for the 3-5% of degreaser gross mass, surplus
For water.
Preferably, surfactant is lauric acid amide of ethanol (RCON (CH2CH2OH)2)。RCON(CH2CH2OH)2
(lauric acid amide of ethanol 6501) has significantly emulsification and dirt-removing power as nonionic surfactant, antistatic, anti-
The performances such as rust, anticorrosion.Itself and alkalescent Na2CO3Compatibility can play better activity, enhance degreasing result.
In the processing method of above-mentioned aluminium alloy, plating tin liquor when electrotinning is handled includes SnSO420-40%, imidazoles
Quinoline Sodium Dicarboxylic Acid 3-20%, 1,10- phenanthrolene 5-20%, sodium gluconate 3-10%, sodium citrate 3-10%, carbon particle
0.5-3%.
It is usually to make additive with ENSA (ethoxylated α naphthol sulfonic acid) in the prior art, deposits this plating liquid energy
Continuously adhere to good tin coating simultaneously can then by soft heat and light, also Bivalent Tin can be prevented to be oxidized to tetravalent tin, it is existing
Complexing agent in technology is generally sodium potassium tartrate tetrahydrate and potassium pyrophosphate, however the application electroplate liquid is made simultaneously by reasonable compatibility
With imidazoline Sodium Dicarboxylic Acid, 1,10- phenanthrolenes, sodium gluconate, sodium citrate, wherein the miaow in the electroplate liquid of the present invention
Oxazoline Sodium Dicarboxylic Acid has good surface-active as amphoteric surfactant, is conducive to improve tin plating solution to aluminum alloy surface
Wetting capacity；The presence of 1,10- phenanthrolene can not only change the crystallization appearance of coating, and coating is made to tend to smooth light
It is bright, while the alkali resistance and etching performance of coating can also be improved, complex compound sodium gluconate and divalent tin ion in the present invention
Stable complex compound is formed, improves the corrosion stability of tin coating, reduces internal stress, is acted synergistically with complex compound citric acid, into one
Step refinement tin deposition layer.Furthermore suitable carbon particle is added in tin plating electrolyte of the present invention, by the effect with other components, into one
Step improves the wearability of aluminium alloy, reduces the coefficient of friction of aluminium alloy.
Preferably, further include pH adjusting agent 1-10%, phenolsulfonic acid (PSA) 3-10% in plating tin liquor.PSA is with dense
Sulfuric acid and phenol are prepared according to certain configuration proportion sulfonation, and effect is can to increase the electric conductivity of electroplate liquid and prevent two
Valency tin is oxidized to tetravalent tin.
Preferably, further include antioxidant 1-5% in plating tin liquor.
In the processing method of above-mentioned aluminium alloy, the modified epoxy includes following component：Epoxy resin 40-
60%th, saturated polyester resin 5-20%, modified polycarbonate 5-10%, inorganic filler 10-20%, curing agent 5-20%.
Modified epoxy of the present invention is based on epoxy resin, compounding saturated polyester resin and modified poly- carbonic anhydride, and
Suitable inorganic filler is added in, wherein being reacted using the low saturated polyester resin of acid value and epoxy resin, has adjusted epoxy resin
Molecular distribution, introduce the active group with low-temperature setting activity, reduce activation energy of curing reaction, so as to reduce powder
Last paint solidification reaction temperature so that complementation occurs for the performance of saturated polyester resin and epoxy resin, has saved the energy, has reduced
Environmental pollution.Its molecular structure of the modified polycarbonate of addition is similar to epoxy resin simultaneously, can be together with saturated polyester resin
Effect forms a homogeneous network structure with epoxy resin, greatly improves the mechanical property of epoxy resin, and when saturated polyester tree
The mass ratio of fat and modified polycarbonate is at (1.5-2)：When 1, best results.And the inorganic filler added in modified resin,
Prevent the strand of epoxy resin is immobilized to a certain extent from occupying original whole spaces again, and may cause
The orientation of epoxy resin.Due to the dimensional stability of filler, the molecular chain movement in epoxy resin interface region filled by
To limitation, and improve its heat distortion temperature, shrinking percentage reduces, and elasticity modulus, hardness, rigidity, impact strength improve.Nothing simultaneously
Machine filler is also used as diluent to adjust the viscosity of epoxy resin.
Preferably, the epoxy resin is bisphenol A type epoxy resin, one kind in phenol novolac epoxy resins or two
Kind.
Further preferably, the epoxy resin for bisphenol A type epoxy resin, phenol novolac epoxy resins by 50-80%,
The mixture of 20-50%.Bisphenol A type epoxy resin crosslink density is higher, and internal stress is larger, flexibility, endurance and heat resistance
Difference, and phenol novolac epoxy resins viscosity is larger, exclusive use is unfavorable for it and is coated uniformly on alloy surface, and when two kinds of resins
While its excellent performance obtains retaining during compounded combination, mutual synergistic effect can be also played, evades and being lacked existing for exclusive use
It falls into.
Preferably, the inorganic filler is silica, 5-15 μm of size.The present invention uses grain size as 5-15 μm
For silica silicon as packing material, reason is porous silica, and high temperature resistant has larger surface area, is easy to ring
Oxygen resin infiltration and scattered.
Preferably, the curing agent is hydroquinone, polyether polyamine, containing the one or more in cyclosiloxane.
Further preferably, the curing agent is hydroquinone, polyether polyamine, presses 30-50%, 20- containing cyclosiloxane
The mixture of 40% and 10-30%.The present invention selects three kinds of curing agent compoundings, and reason is that three kinds of curing agent combinations can generate
Crosslinking curing effect makes epoxy networks for homogeneous system, so as to improve the toughness of epoxy networks.
In the processing method of above-mentioned aluminium alloy, the modified epoxy is modified by the following method to be made：By upper
It states the component described in modified epoxy and weighs raw material, epoxy resin is first dissolved by heating into solution one；Again by saturated polyester tree
Fat, modified poly- carbonic anhydride are dissolved by heating into solution two；Solution two is added in solution one and is first stirred evenly；Then add in inorganic
Filler and curing agent stir lower reaction 1-3h, obtain modified epoxy.
Compared with prior art, the invention has the advantages that：
1. the present invention alkaline ungrease treatment first to aluminium alloy semi-finished product, then electrotinning is carried out, finally layer surface in tin plating again
One layer of modified epoxy is coated, by duplicate protection, further improves the wearability and corrosion resistance of aluminium alloy.
2. the degreaser in alkalescence ungrease treatment of the invention is further selected by rational proportion Na2CO3 and surfactant
Make surfactant with lauric acid amide of ethanol (RCON (CH2CH2OH) 2), effectively play its activity, enhancing degreasing effect
Fruit.
3. electroplate liquid reasonable compatibility its component in electrotinning of the present invention processing, while using imidazoline Sodium Dicarboxylic Acid, 1,
10- phenanthrolenes, sodium gluconate, sodium citrate by the synergistic effect between each component, change the crystalline phase of coating
Looks make coating tend to smooth, while also improve the alkali resistance and etching performance of coating.
4. the present invention also carries out duplicate protection in tin plating layer surface and coats one layer of modified epoxy, and the modified epoxy tree
Fat is based on epoxy resin, compounding saturated polyester resin and modified poly- carbonic anhydride, and adds in suitable inorganic filler, forms one
A homogeneous network structure greatly improves the mechanical property of epoxy resin, and then ensures the wearability and corrosion resistance of final aluminium alloy.
Specific embodiment
It is specific embodiments of the present invention below, and illustrates to be further described technical scheme, but this
Invention is not limited to these embodiments.
Embodiment 1
A kind of processing method of aluminium alloy, the processing method are：The first alkaline degreasing at 38 DEG C by aluminium alloy semi-finished product
12min is handled, the wherein degreaser in ungrease treatment is 18%Na2CO3With 4% lauric acid amide of ethanol (RCON
(CH2CH2OH)2) be dissolved in 78% water be made；
Then electrotinning processing 1h will be carried out under the aluminium alloy semi-finished product room temperature after ungrease treatment, wherein, electroplate tin liquor：
SnSO435%th, imidazoline Sodium Dicarboxylic Acid 15%, 1,10- phenanthrolenes 16%, sodium gluconate 8%, sodium citrate 8%, carbon
Particle 2%, pH adjusting agent 6%, phenolsulfonic acid (PSA) 7%, antioxidant 3%；
Finally aluminum alloy surface after plating coats the modified epoxy that a layer thickness is 25 μm.Wherein modified epoxy
Resin is made by the following method：15% bisphenol A type epoxy resin, 35% phenol novolac epoxy resins are first dissolved by heating into molten
Liquid one；15% saturated polyester resin, 8% modified polycarbonate are dissolved by heating into solution two again；Solution two is added to solution
It is first stirred evenly in one；Then 15% silica and 3% benzenediol, 5% polyether polyamine, 4% are added in containing cyclosiloxane, stirring
Lower reaction 2h, obtains modified epoxy.
Embodiment 2
A kind of processing method of aluminium alloy, difference lies in degreaser group is grouped into embodiment 1：Na2CO3
16.5%th, lauric acid amide of ethanol (RCON (CH2CH2OH)2) 4.5%, water 79%, skimming temp is 37 DEG C, and degreasing time is
13min.Modified epoxy constituent component is：Phenol novolac epoxy resins 45%, saturated polyester resin 15%, modified poly- carbonic acid
Ester 9%, silica 1 6%, hydroquinone 4%, containing cyclosiloxane 11%.Coating thickness is 30 μm.
Embodiment 3
A kind of processing method of aluminium alloy, difference lies in degreaser group is grouped into embodiment 1：Na2CO319%th,
Lauric acid amide of ethanol (RCON (CH2CH2OH)2) 3.5%, water 77.5%.Tin plating electrolyte group is grouped into：SnSO430%th, miaow
Oxazoline Sodium Dicarboxylic Acid 18%, 1,10- phenanthrolenes 18%, sodium gluconate 9%, sodium citrate 5%, carbon particle 1.5%, pH
Conditioning agent 8.5%, phenolsulfonic acid (PSA) 6.5%, antioxidant 4%.The tin plating time is 2h.
Embodiment 4
A kind of processing method of aluminium alloy, difference lies in tin plating electrolyte group is grouped into embodiment 1：SnSO432%th,
Imidazoline Sodium Dicarboxylic Acid 16%, 1,10- phenanthrolenes 18%, sodium gluconate 9%, sodium citrate 6%, carbon particle 1%, pH
Conditioning agent 7%, phenolsulfonic acid (PSA) 8.5%, antioxidant 4.5%.The tin plating time is 2h.Modified epoxy component forms
For：Bisphenol A type epoxy resin 45%, saturated polyester resin 18%, modified polycarbonate 4%, silica 1 8%, benzenediol
3%th, polyether polyamine 12%.Aluminum alloy surface coating thickness is 15 μm.
Embodiment 5
A kind of processing method of aluminium alloy, difference lies in degreaser group is grouped into embodiment 1：Na2CO316%,
Lauric acid amide of ethanol (RCON (CH2CH2OH)2) 4.5%, water 79.5%.Degreaser temperature is 36 DEG C, and degreasing time is
11min.Tin plating electrolyte group is grouped into：SnSO437%, imidazoline Sodium Dicarboxylic Acid 9%, 1,10- phenanthrolenes 17%, glucose
Sour sodium 9%, sodium citrate 7%, carbon particle 2.5%, pH adjusting agent 9%, phenolsulfonic acid (PSA) 7.5%, antioxidant 2%.Plating
The tin time is 30min.Modified epoxy constituent component is：Phenol novolac epoxy resins 55%, saturated polyester resin 6% change
Property makrolon 6%, silica 1 8%, polyether polyamine 15%.Coating thickness is 20 μm.
Embodiment 6
A kind of processing method of aluminium alloy, difference lies in degreaser group is grouped into embodiment 1：Na2CO318%th,
Water 82%, degreaser temperature are 35 DEG C, degreasing time 10min.Tin plating electrolyte group is grouped into：SnSO440%th, imidazoline dicarboxyl
Sour sodium 20%, 1,10- phenanthrolenes 5.5%, sodium gluconate 10%, sodium citrate 10%, carbon particle 0.5%, pH are adjusted
Agent 10%, phenolsulfonic acid (PSA) 3%, antioxidant 1%.Modified epoxy constituent component is：Phenol novolac epoxy resins
45%th, saturated polyester resin 20%, modified polycarbonate 10%, silica 1 0%, polyether polyamine 7%, containing cyclosiloxane
8%.Coating thickness is 30 μm.
Embodiment 7
A kind of processing method of aluminium alloy, difference lies in by 20% bisphenol A type epoxy resin, 25% benzene with embodiment 1
Phenol novolak epoxy first dissolves by heating into solution one；18% saturated polyester resin, 6% modified polycarbonate are dissolved by heating again
Into solution two；Solution one is added in solution two and is first stirred evenly；Then 12% silica and 6% benzenediol, 8% are added in
Polyether polyamine, 5% stir lower reaction 1h, obtain modified epoxy containing cyclosiloxane.
Comparative example 1
A kind of processing method of aluminium alloy, and differing only in for embodiment 1, without aluminium alloy degreasing in the comparative example
Processing.
Comparative example 2
A kind of processing method of aluminium alloy, difference lies in carry out aluminium alloy using existing electronickelling technology with embodiment 1
Plating nickel on surface.
Comparative example 3
A kind of processing method of aluminium alloy, difference lies in using ordinary epoxy resin coated aluminium alloy table with embodiment 1
Face.
Aluminium alloy obtained in embodiment 1-7 and comparative example 1-3 is tested for the property, test result is as shown in table 1.
Table 1：The performance test results of aluminium alloy in embodiment 1-7 and comparative example 1-3
In conclusion the present invention is with Na2CO3With lauric acid amide of ethanol (RCON (CH2CH2OH)2) mixed liquor be de-
Fat liquid carries out alloy ungrease treatment, with SnSO4, imidazoline Sodium Dicarboxylic Acid, 1,10- phenanthrolenes, sodium gluconate, citric acid
Sodium, carbon particle carry out the tin plating protection of alloy surface for tin plating electrolyte, based on epoxy resin, compound saturated polyester resin and modification
Poly- carbonic anhydride, which is made modified epoxy and is coated onto tin plating layer surface, carries out aluminium alloy depth protection, by the above process
The excellent aluminium alloy of final obtained wear-corrosion resistance.
This place embodiment is in place of the claimed non-limit of technical scope midrange and in embodiment technology
The new technical solution formed is replaced on an equal basis to single or multiple technical characteristics in scheme, equally all the present invention claims
In the range of protection, and between the parameter that is related to of the present invention program if not otherwise specified, then there is no can not between each other
The unique combinations of replacement.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology belonging to the present invention is led
The technical staff in domain can do various modifications or supplement to described specific embodiment or substitute in a similar way, but simultaneously
The spirit or beyond the scope of the appended claims of the present invention is not deviated by.
It is skilled to this field although having been made a detailed description to the present invention and being cited some specific embodiments
For technical staff, as long as it is obvious that can make various changes or correct without departing from the spirit and scope of the present invention.
Claims (10)
1. a kind of processing method of aluminium alloy, which is characterized in that the processing method includes the following steps：By aluminium alloy half into
Product first alkaline ungrease treatment, then carries out electrotinning processing, finally aluminum alloy surface after plating coats one layer of modified epoxy
Resin.
2. the processing method of aluminium alloy according to claim 1, which is characterized in that temperature is 35 during alkaline ungrease treatment
DEG C -40 DEG C, it is 10-15min to continue degreasing time.
3. the processing method of aluminium alloy according to claim 1 or 2, which is characterized in that the degreasing in alkaline ungrease treatment
Liquid is Na2CO3With the mixed liquor of surfactant, wherein Na2CO3The 15-20% of degreaser gross mass is accounted for, surfactant accounts for
The 3-5% of degreaser gross mass, surplus are water.
4. the processing method of aluminium alloy according to claim 1 or 2, which is characterized in that electrotinning during electrotinning processing
Liquid includes SnSO420-40%, imidazoline Sodium Dicarboxylic Acid 3-20%, 1,10- phenanthrolene 5-20%, sodium gluconate 3-
10%th, sodium citrate 3-10%, carbon particle 0.5-3%.
5. the processing method of aluminium alloy according to claim 4, which is characterized in that further include pH adjusting agent in plating tin liquor
1-10%, phenolsulfonic acid 3-10%.
6. the processing method of aluminium alloy according to claim 5, which is characterized in that further include antioxidant in plating tin liquor
1-5%.
7. the processing method of aluminium alloy according to claim 1, which is characterized in that the modified epoxy is included such as
Lower component：Epoxy resin 40-60%, saturated polyester resin 5-20%, modified poly- carbonic anhydride 5-10%, inorganic filler 10-20%,
Curing agent 5-20%.
8. the processing method of aluminium alloy according to claim 7, which is characterized in that the epoxy resin is bisphenol A-type
One or more in epoxy resin, liquid-state epoxy resin, phenol novolac epoxy resins.
9. the processing method of aluminium alloy according to claim 7, which is characterized in that the curing agent for hydroquinone,
Polyether polyamine, containing the one or more in cyclosiloxane.
10. the processing method of aluminium alloy according to claim 7, which is characterized in that the modified epoxy passes through
Following method, which is modified, to be made：Component as described in claim 7 weighs raw material, and epoxy resin is first dissolved by heating into solution one；
Saturated polyester resin, modified poly- carbonic anhydride are dissolved by heating into solution two again；It is equal that solution two is added in solution one first stirring
It is even；Then inorganic filler and curing agent are added in, lower reaction 1-3h is stirred, obtains modified epoxy.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112410836A (en) * | 2020-10-16 | 2021-02-26 | 宝应县建飞工艺品厂 | Hardware surface treatment process |
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| CN102660760A (en) * | 2010-10-22 | 2012-09-12 | 罗门哈斯电子材料有限公司 | Tin plating solution |
| CN102330129A (en) * | 2011-09-09 | 2012-01-25 | 江苏飞月轴瓦有限公司 | Tin plating process of aluminum base bearing bush |
| CN107268049A (en) * | 2017-08-07 | 2017-10-20 | 尼尔金属(苏州)有限公司 | A kind of tin plating method on aluminium and aluminum alloy coiled materials |
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| CN112410836A (en) * | 2020-10-16 | 2021-02-26 | 宝应县建飞工艺品厂 | Hardware surface treatment process |
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