CN102719873A - Cathode electrophoretic coating complete covering method for microchannel heat exchanger - Google Patents
Cathode electrophoretic coating complete covering method for microchannel heat exchanger Download PDFInfo
- Publication number
- CN102719873A CN102719873A CN2012102395938A CN201210239593A CN102719873A CN 102719873 A CN102719873 A CN 102719873A CN 2012102395938 A CN2012102395938 A CN 2012102395938A CN 201210239593 A CN201210239593 A CN 201210239593A CN 102719873 A CN102719873 A CN 102719873A
- Authority
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- Prior art keywords
- heat exchanger
- micro
- electrophoresis
- channel heat
- time
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000001962 electrophoresis Methods 0.000 title claims abstract description 126
- 238000000576 coating method Methods 0.000 title claims abstract description 15
- 239000011248 coating agent Substances 0.000 title abstract description 6
- 238000004140 cleaning Methods 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 238000005554 pickling Methods 0.000 claims description 18
- 239000007921 spray Substances 0.000 claims description 18
- 238000005238 degreasing Methods 0.000 claims description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- 238000005406 washing Methods 0.000 claims description 12
- 238000004070 electrodeposition Methods 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 8
- 238000004381 surface treatment Methods 0.000 claims description 7
- 238000010306 acid treatment Methods 0.000 claims description 6
- 239000012528 membrane Substances 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000001681 protective Effects 0.000 abstract description 2
- 239000002253 acid Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound 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- 239000012530 fluid Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 230000003245 working Effects 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
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Abstract
The invention relates to a cathode electrophoretic coating complete covering method for a microchannel heat exchanger, which is as follows: pretreatment is carried out at first, the microchannel heat exchanger treated with a phosphated membrane is placed in an electrophoresis tank for cathode electrophoretic coating treatment, two electrophoreses are required to be sequentially carried out in the electrophoresis tank, the microchannel heat exchanger is driven by the mechanical components to swing vertically and transversely during the first electrophoresis and the second electrophoresis, and the microchannel heat exchanger is required to be turned over for 180 degrees and vertically placed in the electrophoresis tank for cathode electrophoretic coating treatment through the mechanical components during the transition from the first electrophoresis to the second electrophoresis. The complete covering method adopts the precise coating technology, ensures the parts as turned-up edges and inner cavity of the microchannel heat exchanger to be hidden, improves the corrosion resistance of the microchannel heat exchanger as a complete protective membrane can be even formed on the inner wall of the dissected product, and reduces the vertical and transverse swinging amplitude by adopting the two electrophoreses, so as to prevent the deformation of the microchannel heat exchanger.
Description
Technical field
The present invention relates to a kind of metal surface treatment process, relate in particular to and a kind of electrophoretic painting is carried out on the micro-channel heat exchanger surface, guarantee to cover hymeniderm fully, the complete covering method of a kind of micro-channel heat exchanger cathode electro-coating that prolongs its work-ing life.
Background technology
Electrophoretic painting is with after the pre-treatments such as the metal product process oil removing that is coated with, cleaning, surperficial adjustment, phosphatization, pure water cleaning; Product is immersed in the electrophoretic paint; Under the logical direct current certain hour, separate out on coated article that homogeneous is water-insoluble films, film through after the oven dry; Have extremely strong corrosion resistance, thereby prolong the work-ing life of product.
Micro-channel heat exchanger is a kind of aluminium product, and it is arranged side by side by a lot of bar parallel pipes, between parallel flat tube, clips v font fin and assembles, and its spacing of fin is little, and density is high, the spacing minimum of fin and fin less than 1 millimeter.
Because the aluminum pipe of micro-channel heat exchanger itself is thinner, own wt is light, and area is big; In electrophoresis chamber, can produce buoyancy, micro-channel heat exchanger in electrophoresis chamber the time product can float because must with micro-channel heat exchanger be immersed in the electrophoresis chamber again after specific hanger cooperates; But electrophoresis is mentioned after for some time, and the water above the product can not pour off through the gap of fin rapidly, thereby makes product bear the weight of top water; Cause product to produce distortion; Behind overbaking, the inwall of dissecting the discovery product can not be coated with fully and be covered with, and show-through material phenomenon is arranged.In actually operating, technician's guess possibly be because the pre-treating process existing problems improve defatted concd and the method that prolongs degreasing time so adopted, but fails to overcome product distortion and the phenomenon that covers fully.
Presumable technician also guesses because hanger causes, but adopts what kind of extension method no matter, and micro-channel heat exchanger is in electrophoresis chamber; All can form the dead angle between tube wall and the fin and produce bubble, in order to make the bubble collapse of product surface, the technician increases circulation in electrophoresis chamber; Make loudspeaker nozzle above the circulation tube over against the parallel flat tube of product; Push away with this and to catch up with bubble, but such effect can not solve the problem that covers fully, so bubble that produces and extension method have nothing to do.
Summary of the invention
The present invention for solve above-mentioned existence the micro-channel heat exchanger electrophoresis is covered not exclusively, dissects back product inwall can not coating, produce problem such as bubble between tube wall and the fin; Provide a kind of micro-channel heat exchanger cathode electro-coating complete covering method; Before electrophoresis, provide and handle clean micro-channel heat exchanger, and in electrophoresis chamber, solved the problem that produces air filled cavity.
The present invention solves the technical scheme that its technical problem takes: the complete covering method of a kind of micro-channel heat exchanger cathode electro-coating, and said complete covering method comprises pre-treating process and electrophoresis coating method, wherein, said pre-treating process comprises:
1) the first step is put into micro-channel heat exchanger and carries out high pressure cleaning in the high pressure water washing trough, and the temperature of this high pressure cleaning groove is 32 ℃～42 ℃, and the time of high pressure cleaning is three minutes to three minutes 20 seconds;
2) will put into 50 ℃～55 ℃ degreasing tank through the micro-channel heat exchanger behind the high-pressure washing and carry out skimming treatment in three minutes;
3) micro-channel heat exchanger after the degreasing is carried out three washings;
4) micro-channel heat exchanger after will spraying is put into and is carried out three minutes cleanup acid treatment in the pickling tank, and the temperature of this pickling tank remains between 20 ℃～25 ℃;
5) micro-channel heat exchanger after the pickling is carried out three washings;
6) micro-channel heat exchanger after will spraying carries out hymeniderm via the surface treatment functional agent and handles, and the hymeniderm treatment time is two minutes;
7) micro-channel heat exchanger after the hymeniderm processing is carried out three washings;
Said electrophoresis coating method comprises:
A) micro-channel heat exchanger is carried out the electrophoresis first time through vertically putting into behind the above-mentioned pre-treating process in the electrophoresis chamber; This micro-channel heat exchanger is fixed through mechanical component; About in electrophoresis chamber, swing; The temperature of said electrophoresis chamber is 29 ℃～30 ℃, and electrophoresis time is 5～8 minutes in electrophoresis chamber, and application voltage is 300～350 volts;
B) micro-channel heat exchanger behind the general's electrophoresis first time carries out pure water cleaning one minute;
C) micro-channel heat exchanger after the pure water cleaning is overturn 180 ° through mechanical component; Vertically put into again and carry out the electrophoresis second time in the electrophoresis chamber; The electrophoretic while drive under the effect at mechanical component again micro-channel heat exchanger carry out about, swing; The temperature of said electrophoresis chamber is 29 ℃～30 ℃, and electrophoresis time is 2～3 minutes in electrophoresis chamber, and application voltage is 150～300 volts;
D) from electrophoresis chamber, taking out micro-channel heat exchanger dries.
Further, in pre-treating process, in the 3rd, the 5th, the 7th step; The time of said three washings is one minute; Concrete be spray--embathing--spray, and between spraying for the first time and embathing, and embathe the back and get into three intervals to five seconds are all arranged between the spray for the second time; Residual degreasing fluid, acid solution, hymeniderm liquid in the last one procedure on micro-channel heat exchanger surface is washed, avoid influencing next process.
Further, in pre-treating process, said surface treatment functional agent is a phosphorization agent.
Further, in said electrophoresis coating method, when said micro-channel heat exchanger carried out in electrophoresis chamber that the first time, electrophoresis was with electrophoresis for the second time, the height that moves around up and down was 7cm～10cm; The distance that moves around that swings is for 12cm～18cm, about the employing, the purpose that swings is that the dead angle of avoiding forming between tube wall and the fin of micro-channel heat exchanger can produce air filled cavity, covers fully thereby reach product surface.
Wherein, Said mechanical component is made up of motor, cylinder and movable stand; Motor is arranged on the movable stand, and the two ends of hanger snap on the both sides of movable stand, and the rotation through motor drives hanger and swings; And lifting support is driven by cylinder, thus realize micro-channel heat exchanger in hanger about, swing.
The invention has the beneficial effects as follows: this complete covering method adopts covering process accurately; Guarantee the concealment part of micro-channel heat exchanger: like positions such as flange, inner chambers; Even the inwall after dissecting product can both form complete protective membrane, improve the non-corrosibility of micro-channel heat exchanger; Adopt electrophoresis twice, about the reduction, the amplitude that swings, avoid micro-channel heat exchanger to produce distortion.
Embodiment
The complete covering method of a kind of micro-channel heat exchanger cathode electro-coating, said complete covering method comprises pre-treating process and electrophoresis coating method, wherein, said pre-treating process comprises:
1) the first step is put into micro-channel heat exchanger and carries out high pressure cleaning in the high pressure water washing trough, and the temperature of this high pressure cleaning groove is 32 ℃～42 ℃, and the time of high pressure cleaning is three minutes to three minutes 20 seconds;
2) will put into 50 ℃～55 ℃ degreasing tank through the micro-channel heat exchanger behind the high-pressure washing and carry out skimming treatment in three minutes;
3) micro-channel heat exchanger after the degreasing is carried out three washings;
4) micro-channel heat exchanger after will spraying is put into and is carried out three minutes cleanup acid treatment in the pickling tank, and the temperature of this pickling tank remains between 20 ℃～25 ℃;
5) micro-channel heat exchanger after the pickling is carried out three washings;
6) micro-channel heat exchanger after will spraying carries out hymeniderm via the surface treatment functional agent and handles, and the hymeniderm treatment time is two minutes;
7) micro-channel heat exchanger after the hymeniderm processing is carried out three washings;
Said electrophoresis coating method comprises:
A) micro-channel heat exchanger is carried out the electrophoresis first time through vertically putting into behind the above-mentioned pre-treating process in the electrophoresis chamber; This micro-channel heat exchanger is fixed through mechanical component; About in electrophoresis chamber, swing; The temperature of said electrophoresis chamber is 29 ℃～30 ℃, and electrophoresis time is 5～8 minutes in electrophoresis chamber, and application voltage is 300～350 volts;
B) micro-channel heat exchanger behind the general's electrophoresis first time carries out pure water cleaning one minute;
C) micro-channel heat exchanger after the pure water cleaning is overturn 180 ° through mechanical component; Vertically put into again and carry out the electrophoresis second time in the electrophoresis chamber; The electrophoretic while drive under the effect at mechanical component again micro-channel heat exchanger carry out about, swing; The temperature of said electrophoresis chamber is 29 ℃～30 ℃, and electrophoresis time is 2～3 minutes in electrophoresis chamber, and application voltage is 150～300 volts;
D) from electrophoresis chamber, taking out micro-channel heat exchanger dries.
Further, in pre-treating process, in the 3rd, the 5th, the 7th step; The time of said three washings is one minute; Concrete be spray--embathing--spray, and between spraying for the first time and embathing, and embathe the back and get into three intervals to five seconds are all arranged between the spray for the second time; Residual degreasing fluid, acid solution, hymeniderm liquid in the last one procedure on micro-channel heat exchanger surface is washed, avoid influencing next process.
Further, in pre-treating process, said surface treatment functional agent is a phosphorization agent.
Further, in said electrophoresis coating method, when said micro-channel heat exchanger carried out in electrophoresis chamber that the first time, electrophoresis was with electrophoresis for the second time, the height that moves around up and down was 7cm～10cm; The distance that moves around that swings is for 12cm～18cm, about the employing, the purpose that swings is that the dead angle of avoiding forming between tube wall and the fin of micro-channel heat exchanger can produce air filled cavity, covers fully thereby reach product surface.
Embodiment 1, micro-channel heat exchanger is put into carries out high pressure cleaning in the high pressure water washing trough, and the temperature of this high pressure cleaning groove is 32 ℃, and the time of high pressure cleaning is three minutes; To put into 50 ℃ degreasing tank through the micro-channel heat exchanger behind the high-pressure washing and carry out skimming treatment in three minutes; Micro-channel heat exchanger after the degreasing is carried out one minute spray of one minute spray--embathing in a minute--; Micro-channel heat exchanger behind the spray is put into and carried out three minutes cleanup acid treatment in the pickling tank, and the temperature of this pickling tank remains on 20 ℃; Micro-channel heat exchanger after the pickling is carried out one minute spray of one minute spray--embathing in a minute--; Micro-channel heat exchanger is carried out hymeniderm via phosphorization agent handle, the hymeniderm treatment time is two minutes; Carry out one minute spray of one minute spray--embathing in a minute--afterwards; Micro-channel heat exchanger is carried out the electrophoresis first time through vertically putting into behind the above-mentioned pre-treating process in the electrophoresis chamber; This micro-channel heat exchanger is fixed through mechanical component, in electrophoresis chamber about, swing, move up and down distance for 7cm; The distance that swings is 12cm; The temperature of said electrophoresis chamber is 29 ℃, and electrophoresis time is 5 minutes in electrophoresis chamber, and application voltage is 300 volts; Micro-channel heat exchanger behind the first time electrophoresis is carried out pure water to be cleaned one minute; Micro-channel heat exchanger after the pure water cleaning is overturn 180 ° through mechanical component; Vertically put into again and carry out the electrophoresis second time in the electrophoresis chamber, the electrophoretic while drive under the effect at mechanical component again micro-channel heat exchanger carry out about, swing, move up and down distance and be 7cm; The distance that swings is 12cm; The temperature of said electrophoresis chamber is 29 ℃, and electrophoresis time is 2 minutes in electrophoresis chamber, and application voltage is 150 volts; From electrophoresis chamber, taking out micro-channel heat exchanger dries.
Embodiment 2, micro-channel heat exchanger is put into carries out high pressure cleaning in the high pressure water washing trough, and the temperature of this high pressure cleaning groove is 42 ℃, and the time of high pressure cleaning is three minutes 20 seconds; To put into 55 ℃ degreasing tank through the micro-channel heat exchanger behind the high-pressure washing and carry out skimming treatment in three minutes; Micro-channel heat exchanger after the degreasing is carried out one minute spray of one minute spray--embathing in a minute--; Micro-channel heat exchanger behind the spray is put into and carried out three minutes cleanup acid treatment in the pickling tank, and the temperature of this pickling tank remains on 25 ℃; Micro-channel heat exchanger after the pickling is carried out one minute spray of one minute spray--embathing in a minute--; Micro-channel heat exchanger is carried out hymeniderm via phosphorization agent handle, the hymeniderm treatment time is two minutes; Carry out one minute spray of one minute spray--embathing in a minute--afterwards; Micro-channel heat exchanger is carried out the electrophoresis first time through vertically putting into behind the above-mentioned pre-treating process in the electrophoresis chamber; This micro-channel heat exchanger is fixed through mechanical component, in electrophoresis chamber about, swing, move up and down distance for 10cm; The distance that swings is 18cm; The temperature of said electrophoresis chamber is 30 ℃, and electrophoresis time is 8 minutes in electrophoresis chamber, and application voltage is 350 volts; Micro-channel heat exchanger behind the first time electrophoresis is carried out pure water to be cleaned one minute; Micro-channel heat exchanger after the pure water cleaning is overturn 180 ° through mechanical component; Vertically put into again and carry out the electrophoresis second time in the electrophoresis chamber, the electrophoretic while drive under the effect at mechanical component again micro-channel heat exchanger carry out about, swing, move up and down distance and be 10cm; The distance that swings is 18cm; The temperature of said electrophoresis chamber is 30 ℃, and electrophoresis time is 3 minutes in electrophoresis chamber, and application voltage is 300 volts; From electrophoresis chamber, taking out micro-channel heat exchanger dries.
Embodiment 3, micro-channel heat exchanger is put into carries out high pressure cleaning in the high pressure water washing trough, and the temperature of this high pressure cleaning groove is 40 ℃, and the time of high pressure cleaning is three minutes ten seconds; To put into 52 ℃ degreasing tank through the micro-channel heat exchanger behind the high-pressure washing and carry out skimming treatment in three minutes; Micro-channel heat exchanger after the degreasing is carried out one minute spray of one minute spray--embathing in a minute--; Micro-channel heat exchanger behind the spray is put into and carried out three minutes cleanup acid treatment in the pickling tank, and the temperature of this pickling tank remains on 23 ℃; Micro-channel heat exchanger after the pickling is carried out one minute spray of one minute spray--embathing in a minute--; Micro-channel heat exchanger is carried out hymeniderm via phosphorization agent handle, the hymeniderm treatment time is two minutes; Carry out one minute spray of one minute spray--embathing in a minute--afterwards; Micro-channel heat exchanger is carried out the electrophoresis first time through vertically putting into behind the above-mentioned pre-treating process in the electrophoresis chamber; This micro-channel heat exchanger is fixed through mechanical component, in electrophoresis chamber about, swing, move up and down distance for 8cm; The distance that swings is 15cm; The temperature of said electrophoresis chamber is 29 ℃, and electrophoresis time is 7 minutes in electrophoresis chamber, and application voltage is 325 volts; Micro-channel heat exchanger behind the first time electrophoresis is carried out pure water to be cleaned one minute; Micro-channel heat exchanger after the pure water cleaning is overturn 180 ° through mechanical component; Vertically put into again and carry out the electrophoresis second time in the electrophoresis chamber, the electrophoretic while drive under the effect at mechanical component again micro-channel heat exchanger carry out about, swing, move up and down distance and be 8cm; The distance that swings is 15cm; The temperature of said electrophoresis chamber is 29 ℃, and electrophoresis time is 2 minutes in electrophoresis chamber, and application voltage is 200 volts; From electrophoresis chamber, taking out micro-channel heat exchanger dries.
It is emphasized that; More than be preferable enforcement row of the present invention; Be not that any type of restriction is done in this invention in appearance; Every foundation technical spirit of the present invention all still belongs in the scope of technical scheme of the present invention any simple modification, equivalent variations and modification that above embodiment did.
Claims (4)
1. complete covering method of micro-channel heat exchanger cathode electro-coating, it is characterized in that: said complete covering method comprises pre-treating process and electrophoresis coating method, wherein, said pre-treating process comprises:
1) the first step is put into micro-channel heat exchanger and carries out high pressure cleaning in the high pressure water washing trough, and the temperature of this high pressure cleaning groove is 32 ℃～42 ℃, and the time of high pressure cleaning is three minutes to three minutes 20 seconds;
2) will put into 50 ℃～55 ℃ degreasing tank through the micro-channel heat exchanger behind the high-pressure washing and carry out skimming treatment in three minutes;
3) micro-channel heat exchanger after the degreasing is carried out three washings;
4) micro-channel heat exchanger after will spraying is put into and is carried out three minutes cleanup acid treatment in the pickling tank, and the temperature of this pickling tank remains between 20 ℃～25 ℃;
5) micro-channel heat exchanger after the pickling is carried out three washings;
6) micro-channel heat exchanger after will spraying carries out hymeniderm via the surface treatment functional agent and handles, and the hymeniderm treatment time is two minutes;
7) micro-channel heat exchanger after the hymeniderm processing is carried out three washings;
Said electrophoresis coating method comprises:
A) micro-channel heat exchanger is carried out the electrophoresis first time through vertically putting into behind the above-mentioned pre-treating process in the electrophoresis chamber; This micro-channel heat exchanger is fixed through mechanical component; About in electrophoresis chamber, swing; The temperature of said electrophoresis chamber is 29 ℃～30 ℃, and electrophoresis time is 5～8 minutes in electrophoresis chamber, and application voltage is 300～350 volts;
B) micro-channel heat exchanger behind the general's electrophoresis first time carries out pure water cleaning one minute;
C) micro-channel heat exchanger after the pure water cleaning is overturn 180 ° through mechanical component; Vertically put into again and carry out the electrophoresis second time in the electrophoresis chamber; The electrophoretic while drive under the effect at mechanical component again micro-channel heat exchanger carry out about, swing; The temperature of said electrophoresis chamber is 29 ℃～30 ℃, and electrophoresis time is 2～3 minutes in electrophoresis chamber, and application voltage is 150～300 volts;
D) from electrophoresis chamber, taking out micro-channel heat exchanger dries.
2. the complete covering method of a kind of micro-channel heat exchanger cathode electro-coating according to claim 1; It is characterized in that: in pre-treating process; Three, in the 5th, the 7th step, the time of said three washings is one minute, and concrete sprays for spraying--embathing--; And between spraying for the first time and embathing, and entering all has three intervals to five seconds for the second time after embathing between the spray.
3. the complete covering method of a kind of micro-channel heat exchanger cathode electro-coating according to claim 1 is characterized in that: in pre-treating process, said surface treatment functional agent is a phosphorization agent.
4. the complete covering method of a kind of micro-channel heat exchanger cathode electro-coating according to claim 1; It is characterized in that: in said electrophoresis coating method; When said micro-channel heat exchanger carried out in electrophoresis chamber that the first time, electrophoresis was with electrophoresis for the second time, the height that moves around up and down was 7cm～10cm; The distance that moves around that swings is 12cm～18cm.
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