CN107779852A - Surface passivation composition, surface conditioning agent, micro-channel heat exchanger and preparation method thereof - Google Patents
Surface passivation composition, surface conditioning agent, micro-channel heat exchanger and preparation method thereof Download PDFInfo
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- CN107779852A CN107779852A CN201711000888.9A CN201711000888A CN107779852A CN 107779852 A CN107779852 A CN 107779852A CN 201711000888 A CN201711000888 A CN 201711000888A CN 107779852 A CN107779852 A CN 107779852A
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- passivator
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- heat exchanger
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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
-
- 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
- C09D143/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing boron, silicon, phosphorus, selenium, tellurium, or a metal; Coating compositions based on derivatives of such polymers
- C09D143/04—Homopolymers or copolymers of monomers containing silicon
-
- 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
- C23C22/73—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 characterised by the process
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- 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
- C23C2222/00—Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
- C23C2222/20—Use of solutions containing silanes
Abstract
The invention provides a kind of surface passivation composition, surface conditioning agent, micro-channel heat exchanger and preparation method thereof.By weight percentage, the surface passivation composition includes：Silane passivating solution 13~23.5%；Molybdate 0.045~0.095%；Nanometer grade silica 0.025~0.075%；Inorganic film forming agent 1.7~3.9%；Low mass molecule alcohol 2.5~4%；And deionized water 68.43~82.73%.Using the passivating film adhesive force that the surface passivation composition of the application is formed compared with it is strong, antiseptic power is preferable, and there is stronger hydrophily, therefore after being surface-treated using it to the fin of micro-channel heat exchanger, by the surface formed has hydrophily, therefore the problem of preferably avoiding condensed water accumulation, from without the globule and Shui Qiao, customer experience is lifted, and then ensure exchange capability of heat.
Description
Technical field
The present invention relates to the processing technology of micro-channel heat exchanger, in particular to a kind of surface passivation composition, surface
Inorganic agent, micro-channel heat exchanger and preparation method thereof.
Background technology
Micro-channel heat exchanger is a kind of emerging full aluminium heater, due to using pricker between its fin and heat exchanger tube (flat tube)
Welding connects, and does not almost have thermal resistance between fin and heat exchanger tube, therefore have higher heat exchange efficiency.Its processing technology such as Fig. 1
It is shown, finned blade forming and flat tube blanking are first carried out, the fin of shaping and flat tube are then subjected to splicing assembling, then carry out high temperature
Welding, you can form heat exchanger.
Relatively conventional fin-tube heat exchanger, heat exchanger anti-corrosive properties and hydrophily are assigned by the way of fin precoating.But
It is the problem of micro-channel heat exchanger is due to high-temperature soldering, heat exchanger can not be pre-processed, and this results in micro-channel heat exchanger and gone out
Existing following two problems：
1st, fin anti-corrosive properties are poor, and long-term use can cause to occur corroding and separating between fin and aluminium flat conduit, lead
Cause fin to come off, influence exchange capability of heat, in some instances it may even be possible to corrosion failure problem occur；
2nd, fin surface forms the globule, Shui Qiao, causes visitor because without hydrophilic treated, condensed water accumulation easily occurs in surface
The problems such as family experience is poor, and exchange capability of heat declines.
For problem above, prior art uses the PROCESS FOR TREATMENT heat exchanger of electrophoresis, i.e., in one layer of heat exchanger surface electrophoresis
Anticorrosive coat, this solution solves the problem of micro-channel heat exchanger corrosion, but still can not solve the problems, such as that heat exchanger fin is not hydrophilic.
The content of the invention
It is a primary object of the present invention to provide a kind of surface passivation composition, surface conditioning agent, micro-channel heat exchanger and
Its preparation method, to solve the problems, such as that heat exchanger fin is not hydrophilic in the prior art.
To achieve these goals, according to an aspect of the invention, there is provided a kind of surface passivation composition, with weight
Percentages, surface passivation composition include：Silane passivating solution 13~23.5%；Molybdate 0.045~0.095%；Nanoscale
Silica 0.025~0.075%；Inorganic film forming agent 1.7~3.9%；Low mass molecule alcohol 2.5~4%；And deionized water
68.43~82.73%.
Further, above-mentioned inorganic film forming agent includes fluotitanic acid ammonia and/or ammonium fluozirconate.
Further, to account in terms of the percentage by weight of surface passivation composition, above-mentioned inorganic film forming agent include 0.85~
1.95% fluotitanic acid ammonia and 0.85~1.95% ammonium fluozirconate.
Further, to account in terms of the percentage by weight of surface passivation composition, above-mentioned silane passivating solution includes 9~15%
γ aminopropyltriethoxy silane and 4~8.5% γ-glycidyl ether oxygen propyl trimethoxy silicane.
Further, above-mentioned molybdate is any one in sodium molybdate, potassium molybdate, ammonium molybdate, magnesium molybdate and calcium molybdate
Kind is a variety of.
Further, above-mentioned low mass molecule alcohol is ethanol or isopropanol.
According to another aspect of the present invention, there is provided a kind of surface conditioning agent, including surface passivator and sealer, surface
Passivator is prepared by any of the above-described kind of surface passivation composition.
Further, above-mentioned sealer is acrylic resin modified class hydrophilic capping reagent, it is preferable that with percentage by weight
Meter, sealer include 9~15% organosilicon modified crylic acid resin, 0.1~0.5% couplant, 0.02~0.06%
The deionized water of titanium dioxide and surplus, it is further preferable that couplant is KH570；Titanium dioxide includes rutile-type titanium dioxide
Titanium.
According to another aspect of the present invention, there is provided a kind of micro-channel heat exchanger, including metal master and it is attached to metal
The passivation layer of body surfaces, passivation layer form by raw material solidification of surface conditioning agent, and surface conditioning agent is any of the above-described kind of table
Face inorganic agent.
According to another aspect of the present invention, there is provided a kind of preparation method of micro-channel heat exchanger, it is characterised in that prepare
Method includes：Step S1 is blunt in the metal body surface setting of micro-channel heat exchanger using surface passivator by impregnation
Agent film layer, surface passivator are the surface passivator of any of the above-described kind of surface conditioning agent；Step S2, by impregnation,
Sealer film layer is set in passivator film surface using sealer, sealer is the envelope of the surface conditioning agent of claim 7 or 8
Close agent；And step S3, the micro-channel heat exchanger for being provided with sealer film layer and passivator film layer is heat-treated, so that blunt
Agent film layer and the solidification of sealer film layer, form the passivation layer of attachment, the surface of passivation layer is hydrophilic table in metal body surface
Face.
Further, above-mentioned steps S1 includes：Metal master is immersed in surface passivator 30~600 seconds, with gold
Passivator liquid film is formed on the surface of owner's body；Passivator liquid film is cleaned, obtains the net film of passivator；And to passivator
Net film is dried, and obtains passivator film layer.
Further, above-mentioned the step of metal master is immersed in into 30~600 seconds in surface passivator, includes：Transmission is provided
Loop chain, and the multiple automatic lifting hooks of spaced set on transmission loop chain；Immersion liquid groove for holding surface passivator is provided,
Immersion liquid groove has the first side wall being oppositely arranged along the transmission loop chain direction of motion and second sidewall；Metal master is suspended on automatically
On lifting hook, and move transmission loop chain；When metal master moves to the top of the first side wall, metal master enters surface
Impregnated in passivator；And when metal master moves to the top of second sidewall, automatic lifting hook rises so that gold
Owner's body leaves surface passivator.
Further, above-mentioned automatic lifting hook is provided with infrared remote receiver, and the first side wall and second sidewall are set respectively
There is infrared transmitter, when metal master moves to the top of the first side wall, infrared remote receiver receives the signal of infrared transmitter
And indicate that automatic lifting hook declines；When metal master moves to the top of second sidewall, infrared remote receiver receives infrared hair
The signal of emitter simultaneously indicates that automatic lifting hook rises.
Further, the above-mentioned process cleaned to passivator liquid film includes：Using deionized water to passivator liquid film
Cleaned, collect cleaning fluid；Nanofiltration is carried out to cleaning fluid, obtains water and concentrated cleaning solutions, it is preferred to use hydrophily acetic acid is fine
Tie up plain NF membrane or polyamide nanofiltration membrane carries out nanofiltration；And used concentrated cleaning solutions as part surface passivator.
Apply the technical scheme of the present invention, silane passivating solution hydrolyzes in water, formation-SiOH, in use ,-SiOH with
- the OH of metal surface forms covalent bond, and then forms the intensive organosilan film with network structure；The molybdenum that molybdate provides
The strong oxidizing property of acid ion causes the metal of metal surface to be oxidized, and forms stable oxidation film layer, and with reduction spot corrosion
Effect, while improve the adhesive force of organosilan film and metal；Organosilan film of the nanometer grade silica in network structure
It is middle to be fixed, organosilan film strength is further improved, while utilize the strongly hydrophilic of nano silicon so that organosilicon
Alkane film has hydrophily；Inorganic film forming agent is main so that metal surface forms very thin vitrification layer and provided, improve metal with
Bond strength between passivation layer, and certain anti-corrosive properties are provided；Low mass molecule alcohol can further enhance the molten of silane passivating solution
Xie Xing.As can be seen here, using the passivating film adhesive force that the surface passivation composition of the application is formed compared with it is strong, antiseptic power is preferable,
And there is stronger hydrophily, therefore after being surface-treated using it to the fin of micro-channel heat exchanger, by being formed
Surface there is hydrophily, therefore the problem of preferably avoid condensed water accumulation, from without the globule and Shui Qiao, lifting
Customer experience, and then ensure exchange capability of heat.
Brief description of the drawings
The Figure of description for forming the part of the application is used for providing a further understanding of the present invention, and of the invention shows
Meaning property embodiment and its illustrate be used for explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 shows the work flow schematic diagram of the micro-channel heat exchanger of prior art；And
Fig. 2 shows that the preparation flow of the micro-channel heat exchanger provided according to a preferred embodiment of the present invention is illustrated
Figure.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
As the application background technology is analyzed, using the PROCESS FOR TREATMENT heat exchanger of electrophoresis of the prior art, that is, changing
One layer of anticorrosive coat of hot device surface electrophoresis, this solution solves the problem of micro-channel heat exchanger corrosion, but still can not solve heat exchanger
The problem of fin is not hydrophilic.In order to solve the problem, this application provides a kind of surface passivation composition, surface conditioning agent, micro-
Channel heat exchanger and preparation method thereof.
In a kind of typical embodiment of the application, there is provided a kind of surface passivation composition, by weight percentage,
The surface passivation composition includes：Silane passivating solution 13~23.5%；Molybdate 0.045~0.095%；Nanometer grade silica
0.025~0.075%；Inorganic film forming agent 1.7~3.9%；Low mass molecule alcohol 2.5~4%；And deionized water 68.43~
82.73%.
In above-mentioned surface passivation composition, silane passivating solution hydrolyzes in water, formation-SiOH, in use ,-SiOH with
- the OH of metal surface forms covalent bond, and then forms the intensive organosilan film with network structure；The molybdenum that molybdate provides
The strong oxidizing property of acid ion causes the metal of metal surface to be oxidized, and forms stable oxidation film layer, and with reduction spot corrosion
Effect, while improve the adhesive force of organosilan film and metal；Organosilan film of the nanometer grade silica in network structure
It is middle to be fixed, organosilan film strength is further improved, while utilize the strongly hydrophilic of nano silicon so that organosilicon
Alkane film has hydrophily；Inorganic film forming agent is main so that metal surface forms very thin vitrification layer and provided, improve metal with
Bond strength between passivation layer, and certain anti-corrosive properties are provided；Low mass molecule alcohol can further enhance the molten of silane passivating solution
Xie Xing.As can be seen here, using the passivating film adhesive force that the surface passivation composition of the application is formed compared with it is strong, antiseptic power is preferable,
And there is stronger hydrophily, therefore after being surface-treated using it to the fin of micro-channel heat exchanger, by being formed
Surface there is hydrophily, therefore the problem of preferably avoid condensed water accumulation, from without the globule and Shui Qiao, lifting
Customer experience, and then ensure exchange capability of heat.
Selected in the inorganic film forming agent that above-mentioned inorganic film forming agent can be commonly used from the prior art, it is preferably above-mentioned inorganic
Film forming agent includes fluotitanic acid ammonia and/or ammonium fluozirconate, further to improve the corrosion-resistant intensity of formed vitrification layer.It is preferred that
Ground, to account in terms of the percentage by weight of surface passivation composition, inorganic film forming agent include 0.85~1.95% fluotitanic acid ammonia and
0.85~1.95% ammonium fluozirconate.
Silane passivating solution for the application can use the silane passivating solution commonly used in passivator, preferably blunt to account for surface
Change the percentage by weight meter of composition, above-mentioned silane passivating solution includes 9~15% γ aminopropyltriethoxy silane and 4
~8.5% γ-glycidyl ether oxygen propyl trimethoxy silicane.γ-glycidyl ether oxygen propyl trimethoxy silicane institute shape
Into organosilan film strength it is more preferable, but because its dissolubility in water is slightly worse, therefore formed using said ratio
Silane passivating solution both can guarantee that organosilan film strength, and and can ensures the composite effect with other compositions.
Molybdate for the application have it is a variety of, preferably above-mentioned molybdate be selected from sodium molybdate, potassium molybdate, ammonium molybdate, molybdic acid
Any one or more in magnesium and calcium molybdate, to reduce cost.
In addition, the low mass molecule alcohol for the application can be the conventional small molecule such as methanol, ethanol, isopropanol, ethylene glycol
Alcohol, preferably above-mentioned low mass molecule alcohol are ethanol or isopropanol, and the dissolving of silane passivating solution is improved on the premise of solidification rate is ensured
Property.
In another typical embodiment of the application, there is provided a kind of surface conditioning agent, including surface passivator and
Sealer, surface passivator are prepared by any of the above-described kind of surface passivation composition.Combined using the surface passivation of the application
The passivating film adhesive force that thing is formed compared with it is strong, antiseptic power is preferable, and there is stronger hydrophily, therefore utilizing it as surface
After the surface passivator of inorganic agent is surface-treated to the fin of micro-channel heat exchanger, by the surface formed have it is hydrophilic
Property, therefore the problem of preferably avoid condensed water accumulation, from without the globule and Shui Qiao, lifting customer experience, and then
Ensure exchange capability of heat.
The sealer that the sealer used can commonly use from the prior art is combined with the surface passivator of the application
Selected, preferably above-mentioned sealer is acrylic resin modified class hydrophilic capping reagent.Organosilicon modified crylic acid resin is with two
Silica sol and acrylic acid, methacrylic acid, hydroxy acrylic acid, carboxy acrylic etc. synthesize macromolecular resin, and pass through
Ammoniacal liquor heating carries out amino modified, there is provided hydrophilic radical, therefore the film forming matter after organosilicon modified crylic acid resin solidification is
Main hydrophilic substance, so as to form water-wetted surface.
Preferably, by weight percentage, above-mentioned sealer includes 9~15% organosilicon modified crylic acid resin, 0.1
The deionized water of~0.5% couplant, 0.02~0.06% titanium dioxide and surplus, it is further preferable that couplant is
KH570；Titanium dioxide includes rutile titanium dioxide.KH570's (3- (methacryloxypropyl) propyl trimethoxy silicane)
Add the binding ability for predominantly improving silane-modified resin.The titanium dioxide of Rutile structure has high hydrophily,
Rutile structure accounting is controlled in titanium dioxide as far as possible up to more than 90%, in solidification process titanium dioxide by resin solidification in net
In shape structure, to increase the hydrophily of formed passivating film.
In the application in another typical embodiment, there is provided a kind of micro-channel heat exchanger, including metal master and
The passivation layer of metal body surface is attached to, passivation layer forms by raw material solidification of surface conditioning agent, and surface conditioning agent is above-mentioned
Any surface conditioning agent.Using the passivating film adhesive force that the surface conditioning agent of the application is formed compared with it is strong, antiseptic power is preferable,
And there is stronger hydrophily, therefore after being surface-treated using it to the fin of micro-channel heat exchanger, by being formed
Surface there is hydrophily, therefore the problem of preferably avoid condensed water accumulation, from without the globule and Shui Qiao, lifting
Customer experience, and then ensure exchange capability of heat.
In the application in another typical embodiment, there is provided a kind of preparation method of micro-channel heat exchanger, the system
Preparation Method includes：Step S1, by impregnation, set using metal body surface of the surface passivator in micro-channel heat exchanger
Passivator film layer, surface passivator are the surface passivator of any of the above-described kind of surface conditioning agent；Step S2, at dipping
Reason, sealer film layer is set in passivator film surface using sealer, sealer is any of the above-described kind of surface conditioning agent
Sealer；And step S3, the micro-channel heat exchanger for being provided with sealer film layer and passivator film layer is heat-treated, so that
Passivator film layer and the solidification of sealer film layer, the passivation layer of attachment is formed in metal body surface, the surface of the passivation layer is parent
Water surface.Preferably, above-mentioned drying can be air-dried.
When being surface-treated using the surface conditioning agent of the application to micro-channel heat exchanger, it is not necessary to use galvanizer
Skill, and can be completed only with simple impregnation technology, therefore improve the metal body surface processing of micro-channel heat exchanger
Operability.Meanwhile using the application the passivating film adhesive force that is formed of surface conditioning agent compared with it is strong, antiseptic power is preferable, and
With stronger hydrophily, therefore after being surface-treated using it to the fin of micro-channel heat exchanger, by what is formed
Surface has hydrophily, therefore preferably avoids the problem of condensed water gathers, from without the globule and Shui Qiao, lifting visitor
Family is experienced, and then ensures exchange capability of heat.
In a kind of preferred embodiment of the application, above-mentioned steps S1 includes：Metal master is immersed in surface passivator
In 30~600 seconds, with the surface of metal master formed passivator liquid film；Passivator liquid film is cleaned, is passivated
The net film of agent；And the net film of passivator is dried, obtain passivator film layer.The length of above-mentioned dip time can be according to wanting
The thickness of the passivating film asked determines.
Implementing the mode of above-mentioned dipping has a variety of, and in the application another kind preferred embodiment, metal master is impregnated
Include in surface passivator the step of 30~600 seconds：Transmission loop chain is provided, and spaced set is multiple certainly on transmission loop chain
Dynamic lifting hook；The immersion liquid groove for holding surface passivator is provided, immersion liquid groove, which has along the transmission loop chain direction of motion is relative, to be set
The first side wall and second sidewall put；Metal master is suspended on automatic lifting hook, and moves transmission loop chain；Work as metal
Bulk motion to the first side wall top when, metal master enter surface passivator in is impregnated；And when metal master is transported
When moving to the top of second sidewall, automatic lifting hook rises so that metal master leaves surface passivator.Pass through above-mentioned transmission
The setting of loop chain and automatic lifting hook, the automation mechanized operation degree of metal master dipping passivator is improved, improves dipping
The accuracy of time.
Preferably, the lifting of above-mentioned automatic lifting hook is controlled by way of infrared induction, such as preferably above-mentioned
Automatic lifting hook is provided with infrared remote receiver, and the first side wall and second sidewall are respectively arranged with infrared transmitter, as metal master
When body moves to the top of the first side wall, infrared remote receiver receives the signal of infrared transmitter and indicated under automatic lifting hook
Drop；When metal master moves to the top of second sidewall, infrared remote receiver receives the signal of infrared transmitter and indicated automatic
Lifting hook rises.Operating personnel can be according to specific requirement, and length, the time of dipping to immersion liquid groove are controlled.
In order to realize green, the process bag that preferred pair passivator liquid film is cleaned of the application preparation method implementation
Include：Passivator liquid film is cleaned using deionized water, collects cleaning fluid；Nanofiltration is carried out to cleaning fluid, obtains water and concentration
Cleaning fluid, it is preferred to use hydrophily cellulose acetate nano filter-membrane or polyamide nanofiltration membrane carry out nanofiltration；And by concentrated cleaning solutions
Used as part surface passivator.Passivator composition in cleaning fluid and pure water are carried out separation and recycling, returned respectively
Receive and utilize, therefore, avoid environmental pollution caused by the outer row of cleaning fluid.
In addition, above-mentioned steps S1, before implementation, in order to improve the adhesive force of passivation layer, preferred pair metal master carries out clear
The process wash, air-dried.
Below with reference to embodiment and comparative example, the beneficial effect of the application is further illustrated.
The composition of the surface passivator of each embodiment and comparative example is shown in Table 1, wherein, the average grain diameter of nanometer grade silica
For 60~90nm.
Table 1
The difference of embodiment 7 and embodiment 6 is, is replaced using γ-(2,3- the third oxygen of epoxy) propyl trimethoxy silicane
γ aminopropyltriethoxy silane in embodiment 6.
The sealer composition of each embodiment is shown in Table 2, wherein, organosilicon modified crylic acid resin is purchased in Guangzhou Hui Gu chemistry
The HD2202-2 of Co., Ltd, couplant K570, the content of anatase titanium dioxide exists in the titanium dioxide of embodiment 8
More than 90%, the content of rutile titanium dioxide is more than 90% in the titanium dioxide of remaining embodiment.
Table 2
| Organosilicon modified crylic acid resin | Couplant | Titanium dioxide | Deionized water | |
| Embodiment 1 to 7 | 12 | 0.3 | 0.04 | 87.66 |
| Embodiment 8 | 12 | 0.3 | 0.04 | 87.66 |
| Embodiment 9 | 9 | 0.1 | 0.02 | 90.88 |
| Embodiment 10 | 15 | 0.5 | 0.06 | 84.44 |
| Comparative example 1 to 5 | 12 | 0.3 | 0.04 | 87.66 |
Using the surface passivator and sealer of the various embodiments described above a lower surface processing is carried out as surface treatment：
Refer to Fig. 2, after the completion of fin and flat tube welding, form the metal master of micro-channel heat exchanger, using go from
Sub- water air-dries after being cleaned to the metal master, metal master is suspended on automatic lifting hook, and transport transmission loop chain
It is dynamic；When metal master moves to the top of the first side wall, infrared remote receiver receives the signal of infrared transmitter and indicated automatic
Lifting hook declines, and metal master, which enters in surface passivator, to be impregnated (passivation i.e. in figure)；Transmission loop chain continues to move,
When metal master moves to the top of second sidewall, infrared remote receiver receives the signal of infrared transmitter and indicates automatic lifting
Hook rises, and metal master is left surface passivator, and passivator liquid film, wherein dip time control are formed in metal body surface
System is in 5min；Passivator liquid film it is cleaned air-dry after by metal master immerse sealer in, impregnate 1~3min after take out
(i.e. hydrophilic sealing of hole in Fig. 2), heat cure processing is carried out at 120 DEG C~180 DEG C DEG C, obtains passivator film layer.Wherein, clean
Cleaning fluid obtained by passivator liquid film is separated into water and concentrated cleaning solutions after nanofiltration, and concentrated cleaning solutions return after allotment
Immersion liquid groove is returned to use as passivator.
According to standard GB/T 10125-1997, neutral salt spray test is carried out to the micro-channel heat exchanger of processing.In salt fog cabinet
Temperature is the sodium chloride solution that 35 DEG C of salting liquids are 50g/L, and compound method is that analytically pure solid sodium chloride is dissolved in into electrical conductivity
In distilled water no more than 201S/cm, pH value is 6.5~7.5 (this experiment is specially 7.1).By 72h continuous spraying, comment
Level the results are shown in Table 3.Hydrophily test is carried out to the surface of micro-channel heat exchanger, contacted using German Kruss DSA20 standard types
Angle measuring instrument tests the contact angle of water droplet, and water droplet tests 20 and then result of averaging shows, test water contact angle is shown in Table 3.
Table 3
Data in table can be seen that the surface conditioning agent formed using the formula of the application, its salt fog grading knot
Fruit is preferable, and water contact angle is smaller, illustrates that the adhesive force, antiseptic property and hydrophilicity of formed passivation layer are preferable.Moreover,
It can be seen from the contrast of embodiment 6 and comparative example 5, ethanol usage amount continue increase for improve adhesive force, anti-corrosive properties and
Hydrophily does not act on especially, cost can only be increased.And according to the contrast of embodiment 6 and embodiment 8, it can be found that using
The titanium dioxide of rutile-type can further improve the hydrophily of passivating film.
As can be seen from the above description, the above embodiments of the present invention realize following technique effect：
In the application surface passivation composition, silane passivating solution hydrolyzes in water, formation-SiOH, in use ,-SiOH
Covalent bond is formed with-the OH of metal surface, and then forms the intensive organosilan film with network structure；What molybdate provided
The strong oxidizing property of molybdenum acid ion causes the metal of metal surface to be oxidized, and forms stable oxidation film layer, and with reduction point
The effect of erosion, while improve the adhesive force of organosilan film and metal；Organosilan of the nanometer grade silica in network structure
Fixed in film, further improve organosilan film strength, while utilize the strongly hydrophilic of nano silicon so that organic
Silane film has hydrophily；Inorganic film forming agent is main so that metal surface forms very thin vitrification layer and provided, and improves metal
Bond strength between passivation layer, and certain anti-corrosive properties are provided；Low mass molecule alcohol can further enhance silane passivating solution
Dissolubility.As can be seen here, the passivating film adhesive force that is formed using the surface passivation composition of the application is relatively strong, antiseptic power compared with
It is good, and there is stronger hydrophily, therefore after being surface-treated using it to the fin of micro-channel heat exchanger, by institute's shape
Into surface there is hydrophily, therefore preferably avoid condensed water accumulation the problem of, from without the globule and Shui Qiao, carry
Customer experience is risen, and then ensures exchange capability of heat.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (14)
1. a kind of surface passivation composition, it is characterised in that by weight percentage, the surface passivation composition includes：
2. surface passivation composition according to claim 1, it is characterised in that the inorganic film forming agent includes fluotitanic acid ammonia
And/or ammonium fluozirconate.
3. surface passivation composition according to claim 2, it is characterised in that to account for the weight of the surface passivation composition
Percentages are measured, the inorganic film forming agent includes 0.85~1.95% fluotitanic acid ammonia and 0.85~1.95% ammonium fluozirconate.
4. surface passivation composition according to claim 1, it is characterised in that to account for the weight of the surface passivation composition
Measure percentages, the silane passivating solution include 9~15% γ aminopropyltriethoxy silane and 4~8.5% γ-
Glycidyl ether oxygen propyl trimethoxy silicane.
5. surface passivation composition according to claim 1, it is characterised in that the molybdate is selected from sodium molybdate, molybdic acid
Any one or more in potassium, ammonium molybdate, magnesium molybdate and calcium molybdate.
6. surface passivation composition according to claim 1, it is characterised in that the low mass molecule alcohol is ethanol or isopropyl
Alcohol.
7. a kind of surface conditioning agent, including surface passivator and sealer, it is characterised in that the surface passivator will by right
The surface passivation composition any one of 1 to 6 is asked to be prepared.
8. surface conditioning agent according to claim 7, it is characterised in that the sealer is acrylic resin modified class parent
Water seal agent, it is preferable that by weight percentage, the sealer include 9~15% organosilicon modified crylic acid resin,
The deionized water of 0.1~0.5% couplant, 0.02~0.06% titanium dioxide and surplus, it is further preferable that the coupling
Agent is KH570；The titanium dioxide includes rutile titanium dioxide.
9. a kind of micro-channel heat exchanger, including metal master and the passivation layer for being attached to the metal body surface, its feature exist
In the passivation layer forms by raw material solidification of surface conditioning agent, and the surface conditioning agent is the table described in claim 7 or 8
Face inorganic agent.
10. a kind of preparation method of micro-channel heat exchanger, it is characterised in that the preparation method includes：
Step S1 is blunt in the metal body surface setting of the micro-channel heat exchanger using surface passivator by impregnation
Agent film layer, the surface passivator are the surface passivator of the surface conditioning agent described in the claim 7 or 8；
Step S2, by impregnation, sealer film layer, the closing are set in the passivator film surface using sealer
Agent is the sealer of the surface conditioning agent described in the claim 7 or 8；And
Step S3, the micro-channel heat exchanger for being provided with the sealer film layer and the passivator film layer is heat-treated, with
Solidify the passivator film layer and the sealer film layer, the passivation layer of attachment is formed in the metal body surface, it is described
The surface of passivation layer is water-wetted surface.
11. preparation method according to claim 10, it is characterised in that the step S1 includes：
The metal master is immersed in the surface passivator 30~600 seconds, with the shape on the surface of the metal master
Into passivator liquid film；
The passivator liquid film is cleaned, obtains the net film of passivator；And
The net film of the passivator is dried, obtains the passivator film layer.
12. preparation method according to claim 11, it is characterised in that described that metal master is immersed in into the surface is blunt
Include in agent the step of 30~600 seconds：
Transmission loop chain, and the multiple automatic lifting hooks of spaced set on the transmission loop chain are provided；
The immersion liquid groove for holding the surface passivator is provided, the immersion liquid groove has along the transmission loop chain direction of motion phase
To the first side wall and second sidewall of setting；
The metal master is suspended on the automatic lifting hook, and moves the transmission loop chain；
When the metal master moves to the top of the first side wall, the metal master enters in the surface passivator
Impregnated；And
When the metal master moves to the top of the second sidewall, the automatic lifting hook rises so that the metal
Main body leaves the surface passivator.
13. preparation method according to claim 12, it is characterised in that the automatic lifting hook is provided with infrared receiver
Device, the first side wall and the second sidewall are respectively arranged with infrared transmitter, when the metal master moves to described
During the top of one side wall, the infrared remote receiver receives the signal of the infrared transmitter and indicated under the automatic lifting hook
Drop；When the metal master moves to the top of the second sidewall, the infrared remote receiver receives the infrared transmitter
Signal and indicate that automatic lifting hook rises.
14. preparation method according to claim 11, it is characterised in that the process cleaned to passivator liquid film
Including：
The passivator liquid film is cleaned using deionized water, collects cleaning fluid；
To the cleaning fluid carry out nanofiltration, obtain water and concentrated cleaning solutions, it is preferred to use hydrophily cellulose acetate nano filter-membrane or
Polyamide nanofiltration membrane carries out nanofiltration；And
Used the concentrated cleaning solutions as the part surface passivator.
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| CN108893732A (en) * | 2018-07-28 | 2018-11-27 | 广州市杰裕联环保技术有限公司 | Strong corrosion resistant environment-friendlythin thin film passivating method and its passivating solution |
| CN109180985A (en) * | 2018-11-12 | 2019-01-11 | 陈剑 | It is a kind of to utilize the hollow mesoporous SiO of micron order2The anticoagulant water medical silica-gel material that microballoon and PDMS blended cross linking are modified |
| CN109304287A (en) * | 2018-11-30 | 2019-02-05 | 沈阳帕卡濑精有限总公司 | A kind of pre-treating technology suitable for vehicle factor high alumina mixing vehicle body |
| CN109537012A (en) * | 2019-01-23 | 2019-03-29 | 安徽启明表面技术有限公司 | Chromium-free deactivation preparation of zinc coat and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108893732A (en) * | 2018-07-28 | 2018-11-27 | 广州市杰裕联环保技术有限公司 | Strong corrosion resistant environment-friendlythin thin film passivating method and its passivating solution |
| CN109180985A (en) * | 2018-11-12 | 2019-01-11 | 陈剑 | It is a kind of to utilize the hollow mesoporous SiO of micron order2The anticoagulant water medical silica-gel material that microballoon and PDMS blended cross linking are modified |
| CN109180985B (en) * | 2018-11-12 | 2021-05-14 | 陈剑 | SiO utilizing micron-sized hollow mesoporous2Microsphere and PDMS (polydimethylsiloxane) blending crosslinking modified anti-freezing medical silica gel material |
| CN109304287A (en) * | 2018-11-30 | 2019-02-05 | 沈阳帕卡濑精有限总公司 | A kind of pre-treating technology suitable for vehicle factor high alumina mixing vehicle body |
| CN109537012A (en) * | 2019-01-23 | 2019-03-29 | 安徽启明表面技术有限公司 | Chromium-free deactivation preparation of zinc coat and preparation method thereof |
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Application publication date: 20180309 |