CN104117833B - A kind of porous hydrophilic stainless steel heat exchange tube and surface treatment method thereof - Google Patents
A kind of porous hydrophilic stainless steel heat exchange tube and surface treatment method thereof Download PDFInfo
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- CN104117833B CN104117833B CN201410309419.5A CN201410309419A CN104117833B CN 104117833 B CN104117833 B CN 104117833B CN 201410309419 A CN201410309419 A CN 201410309419A CN 104117833 B CN104117833 B CN 104117833B
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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 49
- 239000010935 stainless steel Substances 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000004381 surface treatment Methods 0.000 title claims abstract description 13
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 19
- 239000007791 liquid phase Substances 0.000 claims abstract description 11
- 239000000126 substance Substances 0.000 claims abstract description 11
- 238000009713 electroplating Methods 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 7
- 239000010959 steel Substances 0.000 claims abstract description 7
- 230000002045 lasting effect Effects 0.000 claims abstract description 5
- 238000007788 roughening Methods 0.000 claims abstract description 4
- 239000003792 electrolyte Substances 0.000 claims description 6
- 230000003746 surface roughness Effects 0.000 claims description 4
- 229910002706 AlOOH Inorganic materials 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000009736 wetting Methods 0.000 claims description 3
- 238000005498 polishing Methods 0.000 abstract description 9
- 230000007797 corrosion Effects 0.000 abstract description 8
- 238000005260 corrosion Methods 0.000 abstract description 8
- 238000012546 transfer Methods 0.000 abstract description 7
- 238000005422 blasting Methods 0.000 abstract description 6
- 238000001704 evaporation Methods 0.000 abstract description 6
- 230000008020 evaporation Effects 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 238000009835 boiling Methods 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract 1
- 238000012545 processing Methods 0.000 description 7
- 238000005488 sandblasting Methods 0.000 description 5
- 239000010408 film Substances 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 238000012876 topography Methods 0.000 description 4
- 238000007747 plating Methods 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000011552 falling film Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229910000885 Dual-phase steel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000006200 vaporizer Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/26—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass heat exchangers or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/18—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/09—Heat pipes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
The invention discloses the surface treatment method of a kind of porous hydrophilic stainless steel heat exchange tube, comprise the following steps: stainless steel tube carries out liquid phase plasma electrolysis, laser polishing or blasting treatment, it is achieved surface coarsening；The steel tube surface of roughening is carried out chemical electrolysis or sol-gel modified electroplating processes；And a kind of thus obtained stainless steel heat exchange tube and use the heat exchanger of this tubing.The method according to the invention can obtain the microstructure of porous and depression at various stainless steel pipe surfaces, has raising greatly to enhanced water evaporation and boiling heat transfer；Lasting strong hydrophilicity performance can be obtained at various stainless steel pipe surfaces, accelerate moisture film and sprawl and reduce water film thickness, and then improve heat exchange efficiency；Can obtain, more resistant to spot corrosion, chloride ion stress corrosion and the metal surface of concentration difference micro-cell corrosion, improving heat-exchange unit stability in the large and service life at various stainless steel pipe surfaces.
Description
Technical field
The present invention relates to heat-transfer equipment technical field, particularly relate to the outer evaporation heat transfer of a kind of enhanced tube
Porous hydrophilic stainless steel heat exchange tube and surface treatment method thereof.
Background technology
At present, in absorption refrigerating machine and the vaporizer of heat pump, absorber, widely used falling film type changes
Hot device, its housing runs under vacuum, makes cold-producing medium spray by certain mode horizontally arranged
Heat-transfer pipe on, pipe contains cold-producing medium and cools down or heat, in utilizing the cold-producing medium outside pipe and pipe
Cold-producing medium carries out heat exchange.In order to improve heat exchange efficiency, evaporate outside enhanced tube and reduce heat transmission equipment body
Long-pending, can be realized by the way changing heat exchanger tube shape or surface topography.The former uses and is machined into
Tube outer surface forms the structures such as wing, tooth, annular knurl, to increase surface area, to promote that condensed fluid becomes membrane flow,
By gap discharge opeing；The latter mainly uses dip coating to form the organic coating with hydrophilic group, or
Roasting method forms the metal coating of loose structure.The subject matter that machining mode exists includes: (1)
The ductility of tubing, elastic modelling quantity, hardness etc. make ferritic stainless steel, dual phase steel, martensite not
The tubing such as rust steel pipe cannot realize porous surface by machining；(2) interior external tooth, internal and external threads etc.
Wall thickness is required higher by structure, adds the weight of tubing；(3) wing shape and gap easily form refrigeration
Agent retention areas, increases condensed fluid and becomes membrane resistance, the cold-producing medium that viscosity is big is more readily formed not " profit
Wet " dead band, reduce heat exchange efficiency；(4) efficient carbon steel pipe and the rustless steel of machining production are utilized
Pipe, owing to not being susceptible to spot corrosion during surface processes under arms, the residue in groove
Also can the development of accelerated corrosion, reduce the service life of heat exchanger tube.
Summary of the invention
Therefore, it is an object of the invention to overcome the deficiency of conventional machining techniques to provide one to make
The evaporation of falling-film heat exchanger stainless steel heat exchange tube outer surface cold-producing medium, cooling energy recovery significantly improve,
Heat exchange area is made to increase, can wanting according to the design of coolant type, heat exchange efficiency and service life of equipment
Ask and select widely metal material and the efficient heat-exchanging pipe of thinner walls thickness, and corresponding surface is provided
Reason method.
The purpose of the present invention can be reached by following measure.
Step one: stainless steel pipe surface is carried out at liquid phase plasma electrolysis, laser polishing or sandblasting
Reason, to realize surface coarsening；
Step 2: the stainless steel pipe surface after roughening is carried out chemical electrolysis or sol-gel modified electroplating processes,
To realize the extension of porous and depression, and strengthen wettability.
Preferably, in described step one, liquid phase plasma electrolytic current density is 4～5A/dm2, voltage
Being 280～300V, dutycycle is 50～65%, and electrolyte is Na2SO4-Na3BO3System, processes temperature
Degree is 45～50 DEG C；
Preferably, the laser power that in described step one, laser is polished is 3.5KW, lasing beam diameter is
2.5mm, sweep speed is 30cm/s, and inlet pipe speed is 1.5m/min；
Preferably, the Brown Alundum that the blasting treatment in described step one uses mean diameter to be 16 mesh,
Blasting pressure is 0.8MPa, and nozzle is 15～20cm away from tube-surface distance, it is achieved stainless steel bare tube table
Face is roughened；
Preferably, the chemical electrolysis in described step 2, electric current density is 20A/dm2, voltage is
30～40V, electrolyte is H2SO4-NazSO4-EDTA-2Na system, treatment temperature is 30～50 DEG C；
Preferably, in the sol-gel modified plating in described step 2, electric current density is 30～45A/dm2,
Electroplate liquid system is Cr2(SO4)3-H3BO4-AlOOH, its mol ratio is 30: 17: 5.
Additionally, the present invention also provides for a kind of rustless steel heat exchange processed by above-mentioned surface treatment method and obtain
Manage and use the heat exchanger of described stainless steel heat exchange tube.
The present invention the most relatively has the advantages that can be at various stainless steel tube tables
Face obtains the microstructure of porous and depression, has raising greatly to enhanced water evaporation and boiling heat transfer；Can
To obtain lasting strong hydrophilicity performance at various stainless steel pipe surfaces, accelerate moisture film and sprawl and reduce moisture film
Thickness, and then improve heat exchange efficiency；Can various stainless steel pipe surfaces obtain more resistant to spot corrosion, chlorine from
Sub-stress corrosion and the metal surface of concentration difference micro-cell corrosion, improve heat-exchange unit stability in the large and make
Use the life-span.
Accompanying drawing explanation
Fig. 1 is the stereoscan photograph of the stainless steel pipe surface of liquid phase plasma Electrolyzed Processing；
Fig. 2 is the stereoscan photograph of the stainless steel pipe surface of laser polishing processing；
Fig. 3 is the optical microscope photograph of the stainless steel pipe surface of sandblasting processing；
Fig. 4 is the stereoscan photograph of the stainless steel pipe surface of laser polishing+chemical electrolysis processing；
Fig. 5 a, 5b be respectively laser polishing+sol-gel modified plating processing after stainless steel tube surface,
Cross-sectional scans electromicroscopic photograph.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with concrete real
Execute example, and referring to the drawings, the present invention is described in further detail.
The surface treatment method of the porous hydrophilic stainless steel heat exchange tube of the present invention, comprises the following steps:
Step one: stainless steel pipe surface is carried out at liquid phase plasma electrolysis, laser polishing or sandblasting
Reason, it is achieved surface coarsening；
Step 2: the stainless steel pipe surface after roughening is carried out chemical electrolysis or sol-gel modified electroplating processes,
Realize the extension of porous and depression, and strengthen wettability.
Wherein, liquid phase plasma electrolysis, laser polishing or blasting treatment in described step one can
To use known condition and parameter, as long as steel tube surface roughness can be strengthened, improve its hydrophilicity.
Wherein, the described chemical electrolysis in step 2 or sol-gel modified electroplating processes can use known
Condition and parameter, as long as the extension of porous and depression can be realized, strengthen wettability.
It is furthermore preferred that in order to realize optimum efficiency, process conditions have been made further preferably by inventor,
Further illustrate below in conjunction with specific embodiment.
Embodiments below 1-3 is to process stainless steel tube only with the technique in step one
Embodiment, embodiment 4,5 is to use the technique in step one and step 2 to stainless steel tube simultaneously
Carry out the embodiment processed.
Embodiment 1
The liquid phase plasma of SUS445J2 stainless steel pipe surface is electrolysed under 45～50 DEG C of constant temperatures,
Utilizing intelligent pulse power to control output voltage, electric current, voltage is 280V, and dutycycle is 55%,
Electric current is 15A, and electrolyte is 15wt.%Na2SO4-10wt.%Na3BO3System, processes 10min
Rear washing is dried, it is achieved surface coarsening, its surface topography is as shown in Figure 1；
Embodiment 2
The laser power of the laser polishing of SUS304 stainless steel pipe surface is 3.5KW, lasing beam diameter
For 2.5mm, sweep speed is 30cm/s, and inlet pipe speed is 1.5m/min, it is achieved surface coarsening,
Surface topography after process is as shown in Figure 2；
Embodiment 3
The Brown Alundum that SUS316 stainless steel pipe surface blasting treatment uses mean diameter to be 46 mesh, sandblasting
Pressure is 0.8Mpa, and nozzle is 18cm away from surface distance, uses double end longitudinal direction sandblasting, and steel pipe is advanced
Speed is 3m/min, it is achieved surface coarsening, and the surface topography after process is as shown in Figure 3；
Embodiment 4
SUS445J2 stainless steel pipe surface, after the PROCESS FOR TREATMENT in embodiment 2, carries out chemical-electrical
Solving processing, electric current density is 20A/dm2, voltage is 30V, and electrolyte is 10wt.%H2SO4-10wt.%
Na2SO4-0.5wt.%-EDTA-2Na, treatment temperature is 30 DEG C, and the process time is 15min, it is achieved
Porous and the extension of depression, and strengthen wettability, the surface new look obtained is as shown in Figure 4；
Embodiment 5
SUS316 stainless steel pipe surface, after the PROCESS FOR TREATMENT in embodiment 2, carries out sol-gel modified
Plating processing, electric current density is 30A/dm2, electroplate liquid system is 12wt.%Cr2(SO4)3-4.5
Wt.%H3BO4-2wt.%AlOOH, with sulfur acid for adjusting pH value to about 1, room temperature processes 10 points
Achieve the extension of porous and depression after clock, and enhance wettability, the surface that obtains, cross section
Pattern is as shown in Fig. 5 a, 5b.
The stainless steel tube obtaining above-mentioned five embodiments carries out the measurement of surface roughness and angle of wetting,
Result is as follows:
As can be seen here, heat exchanger tube after liquid phase plasma electrolysis, laser polishing or blasting treatment
Surface roughness Ra is about 30～40 μm, and Rz is about 45～55 μm.Warp the most again
Cross the stainless steel tube porous surface after chemical electrolysis or sol-gel modified electroplating processes and show lasting strong
Hydrophilic, angle of wetting≤30 °.
By above-described embodiment, technical scheme can obtain at various stainless steel pipe surfaces
To porous and the microstructure of depression, enhanced water evaporation and boiling heat transfer are had raising greatly, it is possible to
Obtain lasting strong hydrophilicity performance at various stainless steel pipe surfaces, accelerate moisture film and sprawl and reduce moisture film thickness
Degree, and then improve heat exchange efficiency, thus strengthened that to manage the porous hydrophilic of outer evaporation heat transfer the most stainless
Steel heat exchanger tube.
Particular embodiments described above, is carried out the purpose of the present invention, technical scheme and beneficial effect
Further describe it should be understood that the foregoing is only the specific embodiment of the present invention,
Be not limited to the present invention, all within the spirit and principles in the present invention, any amendment of being made,
Equivalent, improvement etc., should be included within the scope of the present invention.
Claims (8)
1. the surface treatment method of a porous hydrophilic stainless steel heat exchange tube, it is characterised in that under including
Row step:
1.1 pairs of stainless steel tubes carry out liquid phase plasma electrolysis process, it is achieved surface coarsening；
The steel tube surface of 1.2 pairs of roughening carries out chemical electrolysis or sol-gel modified electroplating processes, it is achieved porous
Change and the extension of depression, and strengthen wettability.
The surface treatment method of stainless steel heat exchange tube the most according to claim 1, wherein step
The condition that liquid phase plasma electrolysis described in 1.1 processes is: electric current density is 4～5A/dm2, voltage
Being 280～300V, dutycycle is 65%, and electrolyte is Na2SO4-Na3BO3System, treatment temperature
It it is 45～50 DEG C.
The surface treatment method of stainless steel heat exchange tube the most according to claim 2, wherein passes through
After liquid phase plasma electrolysis process, the surface roughness Ra of heat exchanger tube is 30～40 μm, and Rz is
45～55 μm；
The surface treatment method of stainless steel heat exchange tube the most according to claim 1, wherein in step
The condition that chemical electrolysis described in rapid 1.2 processes is: electric current density is 20A/dm2, voltage is
30～40V, electrolyte is H2SO4-Na2SO4-EDTA-2Na system, treatment temperature is 30～50 DEG C；
The condition of described sol-gel modified electroplating processes is: electric current density is 30～45A/dm2, electroplate liquid system
For Cr2(SO4)3-H3BO4-AlOOH, its mol ratio is 30: 17: 5～30: 17: 10.
The surface treatment method of stainless steel heat exchange tube the most according to claim 4, wherein passes through
Porous surface after chemical electrolysis process or sol-gel modified electroplating processes forms depression or interior depression, depression
Porosity of=80%, the apparent diameter in hole is 10～30 μm.
The surface treatment method of stainless steel heat exchange tube the most according to claim 5, wherein passes through
Stainless steel tube porous surface after chemical electrolysis process or sol-gel modified electroplating processes is lasting strong parent
Aqueous, angle of wetting≤30 °.
7. it is prepared into according to the surface treatment method of the arbitrary described stainless steel heat exchange tube of claim 1-6
The stainless steel heat exchange tube arrived.
8. use the heat exchanger of stainless steel heat exchange tube as claimed in claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410309419.5A CN104117833B (en) | 2014-07-01 | 2014-07-01 | A kind of porous hydrophilic stainless steel heat exchange tube and surface treatment method thereof |
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| CN201410309419.5A CN104117833B (en) | 2014-07-01 | 2014-07-01 | A kind of porous hydrophilic stainless steel heat exchange tube and surface treatment method thereof |
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| CN104117833B true CN104117833B (en) | 2016-09-28 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104726914B (en) * | 2015-01-23 | 2017-09-29 | 中石化石油工程技术服务有限公司 | A kind of surface treatment method of heating furnace heat exchange coil |
| CN106693738B (en) * | 2016-12-07 | 2019-10-25 | 江苏鲁汶仪器有限公司 | Form the device and method with the gas-liquid mixture for stablizing vapour concentration |
| CN107252978A (en) * | 2017-05-12 | 2017-10-17 | 中国船舶重工集团公司第七二五研究所 | A kind of laser preparation method of super hydrophilic titanium alloy heat exchanger plates |
| CN109632899B (en) * | 2018-11-02 | 2021-03-30 | 广东工业大学 | A Precisely Controlled Method for Fabricating Nanopores |
| CN118960248B (en) * | 2024-10-16 | 2025-01-21 | 集美大学 | A hydrophilic falling film internal micro-fin tube evaporative condenser |
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| CN103649240A (en) * | 2011-01-19 | 2014-03-19 | 哈佛学院院长等 | Slippery surfaces with high pressure stability, optical transparency, and self-healing characteristics |
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