CN107937976A - A kind of bloom aluminium section bar electrochemical polishing treatment technique - Google Patents
A kind of bloom aluminium section bar electrochemical polishing treatment technique Download PDFInfo
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- CN107937976A CN107937976A CN201711288575.8A CN201711288575A CN107937976A CN 107937976 A CN107937976 A CN 107937976A CN 201711288575 A CN201711288575 A CN 201711288575A CN 107937976 A CN107937976 A CN 107937976A
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- 238000005498 polishing Methods 0.000 title claims abstract description 103
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 70
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 239000004411 aluminium Substances 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000002253 acid Substances 0.000 claims abstract description 28
- 238000007517 polishing process Methods 0.000 claims abstract description 25
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 21
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 12
- QXKAIJAYHKCRRA-JJYYJPOSSA-N D-arabinonic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)C(O)=O QXKAIJAYHKCRRA-JJYYJPOSSA-N 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 239000000725 suspension Substances 0.000 claims description 7
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 4
- 229910052708 sodium Inorganic materials 0.000 claims description 4
- 239000011734 sodium Substances 0.000 claims description 4
- 235000010489 acacia gum Nutrition 0.000 claims description 3
- 239000001785 acacia senegal l. willd gum Substances 0.000 claims description 3
- 229920001285 xanthan gum Polymers 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 2
- 230000009469 supplementation Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 21
- 239000000463 material Substances 0.000 description 20
- 238000005516 engineering process Methods 0.000 description 10
- 239000012530 fluid Substances 0.000 description 7
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 229910001431 copper ion Inorganic materials 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 230000007115 recruitment Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910001008 7075 aluminium alloy Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 208000013935 Electric injury Diseases 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- KVBCYCWRDBDGBG-UHFFFAOYSA-N azane;dihydrofluoride Chemical compound [NH4+].F.[F-] KVBCYCWRDBDGBG-UHFFFAOYSA-N 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- HKIQCRMZWJSHBZ-UHFFFAOYSA-L dihydroxy(dioxo)chromium phosphoric acid sulfuric acid Chemical compound OP(O)(O)=O.OS(O)(=O)=O.O[Cr](O)(=O)=O HKIQCRMZWJSHBZ-UHFFFAOYSA-L 0.000 description 1
- KPVWDKBJLIDKEP-UHFFFAOYSA-L dihydroxy(dioxo)chromium;sulfuric acid Chemical compound OS(O)(=O)=O.O[Cr](O)(=O)=O KPVWDKBJLIDKEP-UHFFFAOYSA-L 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000006210 lotion Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000007540 photo-reduction reaction Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F3/00—Electrolytic etching or polishing
- C25F3/16—Polishing
- C25F3/18—Polishing of light metals
- C25F3/20—Polishing of light metals of aluminium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- ing And Chemical Polishing (AREA)
Abstract
The invention discloses a kind of bloom aluminium section bar electrochemical polishing treatment technique, it is 25 28g/L of fluoboric acid that tank liquor, which forms, in polishing trough, 5 5.5 g/L of nitric acid, 6.0 6.1 g/L of arabic acid, 0.5 0.6 g/L of xanthic acid, surplus are water, polishing trough tank liquor temperature is 25 35 DEG C, and polishing current density is 2.0 2.1A/dm2；In electrochemical polishing process, aluminium section bar is positioned in polishing tank liquor, and conducting beam is fixedly arranged on removable anode conducting seat；When single aluminium shape surface product to be processed is less than 100cm2, polish voltage and be no more than 15V.Aluminium section bar toasts 10 15min before electrochemical polishing treatment in 80 85 DEG C of baking ovens.The present invention provides a kind of bloom aluminium section bar electrochemical polishing treatment technique based on fluoboric acid system, which can carry out effective bloom polishing to aluminium section bar, have extraordinary polishing effect especially for 7 line aluminium alloys.
Description
Technical field
The invention belongs to aluminium section bar working process technical field, and in particular to a kind of bloom aluminium section bar electrochemical polishing treatment
Technique.
Background technology
The appearance and applicability of aluminium section bar depend greatly on the surface preparation before finish.The surface of aluminium section bar
Pretreatment mainly includes：Surface mechanical treatment based on polishing, scratch brushing, tumbling；Using sodium hydroxide corrosion as main medium
Caustic corrosion technology；Using ammonium acid fluoride as the acid corrosion technology mainly ended；Using phosphoric acid, sulfuric acid, nitric acid as the strong of main medium
Sour polishing technology；Electrobrightening technology；Chromaking technology based on Cr VI etc..Wherein, electrochemical polish technology is using most
For one of optimal technology of extensive, polishing effect.Include two important components during electrochemical polishing process, when
The bright process of electrochemical polish, mainly microcosmic bright process；Second, the smooth process of electrochemical polish, mainly
Macroscopic view, uniform, the fine and close, process of smooth planar surface are produced, these are all similar with chemical polishing, and difference is
In chemical polishing required electric current be it is internal produce, be caused by local micro cell, and the electric current in electrochemical polish be by
It is externally supplied.The process of electrochemical polish is controlled by electrochemical reaction process.
Electrochemical polishing process is suitable for obtaining the aluminium shape surface of high brightness, can be with for the aluminium section bar of special processing
Obtain the surface of high specular light brightness.Typical electrochemical polishing process is polished by the alkali electrochemical of sodium carbonate-tertiary sodium phosphate
Technique, phosphoric acid-chromic acid-sulfuric acid electrochemical polishing process, fluoboric acid electrochemical polishing process and sulfuric acid-chromic acid electrochemical polish work
Skill.The final burnishing surface product qualitative factor of influence factor is more in electrochemical polishing process, mainly includes as follows：
1st, charging method；
2nd, agitating mode；
3rd, polishing time, polish temperature, polishing fluid composition；
4th, the suitability between Current Voltage and polishing fluid is polished.
Electrochemical polishing process of the prior art is often relatively low to specific aluminum section bar processing technology adaptation degree, polishing effect
Rate is not high, polishing finished product brightness deficiency, once polishing fluid can form white attachment using the excessive aluminium shape surface of cycle-index
Thing, influences subsequent machining technology very big.
The content of the invention
In order to solve the deficiencies in the prior art, the present invention provides a kind of bloom aluminium profiles based on fluoboric acid system
Material electrochemical polishing treatment technique, the technique can carry out effective bloom polishing to aluminium section bar, have especially for 7 line aluminium alloys
Extraordinary polishing effect.
The technique effect of the invention to be reached is realized by following scheme：
The aluminium section bar electrochemical polishing treatment technique provided in the present invention, in polishing trough tank liquor composition be fluoboric acid 25-28g/L,
Nitric acid 5-5.5 g/L, arabic acid 6.0-6.1 g/L, xanthic acid 0.5-0.6 g/L, surplus are water, and polishing trough tank liquor temperature is
25-35 DEG C, polishing current density is 2.0-2.1A/dm2；
In electrochemical polishing process, aluminium section bar is positioned in polishing tank liquor, and conducting beam is fixedly arranged on removable anode conducting seat；When
Single aluminium shape surface product to be processed is less than 100cm2, polish voltage and be no more than 15V；When single aluminium shape surface to be processed
Product is more than or equal to 100cm2, less than or equal to 160cm2, it polishes voltage and is not less than 15V, not higher than 20V；When single aluminium to be processed
Surface of profile product is more than 160cm2, it polishes voltage and is not less than 20V, no more than 35V；
Aluminium section bar is superconducting tilting suspension in electrochemical polishing process, its suspension angles is in 15-18 ° with conducting beam；Aluminium section bar is in electrification
10-15min is toasted in 80-85 DEG C of baking oven before optical polishing processing.
Composition of the mixing acid system of fluoboric acid, nitric acid and the citric acid used in the present invention as electrochemical polish liquid,
In electrochemical polishing process, aluminium section bar is positioned in polishing tank liquor, and conducting beam is fixedly arranged on removable anode conducting seat, operation electricity
Pressure is related with aluminium shape surface product to be processed, both need to be adapted to, and no person occurs that undertension burnishing surface is coarse and brightness
It is low, or the problem of the appearance white attachment of overtension aluminium shape surface.
Nitric acid content has to rationally be controlled, and nitric acid content is relatively low to cause aluminium shape surface to gather excessive gas
Corrosion is produced so as to form air pocket, is adapted therewith, can adjust the speed of removable anode conducting seat, assist gas is arranged as early as possible
Go out.Mobile 15-20 weeks per minute of the preferred removable anode conducting seat in the present invention.Nitric acid content is also unsuitable excessive, otherwise
Acid etch is serious, and electrochemical polishing process reaction can be made acutely to cause aluminium shape surface excessively coarse, be unable to reach the effect of polishing
Fruit.Citric acid then can effectively avoid aluminium section bar and point corrosion produced in polishing process, especially avoid aluminium shape surface from producing
The lotion trace that superficial corrosion default or generation are dried.Zn content is high in 7 line aluminium alloys, also comprising gold such as magnesium, chromium, nickel, titaniums
Belong to foreign ion, a small amount of xanthic acid is added in polishing fluid in the present invention can effectively precipitate unnecessary foreign ion, ensure electrolysis
Polishing process is smoothed out, and lift electrolytic polishing liquid uses cycle period.
Current density in polishing process need to be strictly controlled, and be able to not can effectively be polished if current density is low, excessive
Security risk can be produced, once Al alloy parts power-on voltage rises too fast, electric injury can be produced, to operating personnel and to be processed
Al alloy parts all there are undesirable influence.
The moisture content of aluminium section bar raw material is often ignored in the glossing of the prior art, if actual conditions are in aluminium section bar
Surface moisture content is high, and the surface brightness it will cause polishing is insufficient, when moisture is excessive, once nitric acid content is excessive, then
Aluminium shape surface can be caused to form rainbow film.Therefore in the present invention, aluminium section bar is before electrochemical polishing treatment in 80-85 DEG C of baking
10-15min, the moisture that thorough removal carries in itself are toasted in case.Simultaneously as it can be produced in electrochemical polishing process substantial amounts of
Bubble, can form the bubble layer of stop electric current in aluminium shape surface if blistering is discharged not in time, throw electrochemistry in the present invention
Aluminium section bar is superconducting tilting suspension in photoreduction process, its suspension angles is in 15-18 ° with conducting beam, makes the bubble of generation since inclination angle coordinates
Stirring can be discharged smoothly.
Further, the polishing trench bottom, which is equipped with, is used for the heat exchange copper tube that auxiliary heats, in the copper pipe outside unicom
Heat source.
Further, the Arabic gum or xanthans of 2-3g/L is also added in the polishing trough in tank liquor, prevents acid solution
Excessive etch to aluminium alloy section surface.
Further, the sodium persulfide of 0.1-0.15g/L is also added in the polishing trough in tank liquor, for precipitating polishing trough
Unnecessary copper ion in liquid, unnecessary copper ion can cause color film of the aluminium section bar burnishing surface with metals copper color feature, shadow
Ring following process processing.
Further, in the electrochemical polishing treatment technique, fluoboric acid working concentration needs to mend when being less than 18 g/L
Fill polishing trough tank liquor.Fluoboric acid working concentration is optimal in the range of 25-28g/L, as the progress of electrochemical polish, its work are dense
Degree can decrease, and when 18 g/L is less than, polishing effect can not be received, therefore need to supplement new polishing fluid.Into one
Step ground, the polishing trough tank liquor magnitude of recruitment are the 15-20% of former volume of bath solution.
Further, molten aluminum amount is not more than 6g/L in the polishing trough tank liquor.Molten aluminum amount is excessive to cause aluminium shape surface
The attachment of deposited ice crystals shape appearance, prevents electrochemical polishing process from being normally carried out.
Further, to promote stirring efficiency, the polishing trough groove body side wall is equipped with rotation blender, in removable sun
During the conductive seat movement of pole, rotation blender, which can be rotated voluntarily, makes polishing fluid stirring sufficient.
Further, the electrochemical polishing treatment technique be suitable for Zn content be more than 5wt% aluminium alloy, including 7001,
7003rd, 7021,7049,7050,7150,7055,7075,7175,7475,7085 aluminium alloy.
The present invention has the following advantages：
The present invention provides a kind of bloom aluminium section bar electrochemical polishing treatment technique based on fluoboric acid system, which can
Effective bloom polishing is carried out to aluminium section bar, has extraordinary polishing effect especially for 7 line aluminium alloys.
Embodiment
With reference to embodiment, the present invention will be described in detail.
The polishing trench bottom used in following embodiments is equipped with heat exchange copper tube, unicom external heat source in copper pipe, to ensure to throw
Temperature maintains constant technological temperature in light groove.Electrochemical polishing process circulates 6-8 times, tests fluoboric acid concentration and molten aluminium is dense
Degree, fluoboric acid working concentration require supplementation with polishing trough tank liquor when being less than 18 g/L, polishing trough tank liquor magnitude of recruitment is former tank liquid
Long-pending 20%.Molten aluminum amount after 6g/L more than replacing polishing fluid.Aluminium section bar is superconducting tilting suspension in electrochemical polishing process, it hangs angle
Degree is in 16 ° with conducting beam；Aluminium section bar toasts 15min before electrochemical polishing treatment in 85 DEG C of baking ovens, baking temperature and when
Between need strictly to control, the otherwise easy yellow of aluminium shape surface.
Polishing trough groove body side wall is equipped with rotation blender, moves anode conducting seat movement per minute 20 weeks.
Embodiment 1
It is 80 cm that 7001 aluminium alloys are made surface area2Sheet material carry out electrochemical polishing treatment, tank liquor composition is in polishing trough
Fluoboric acid 28g/L, 5.0 g/L of nitric acid, 6.1 g/L of arabic acid, xanthic acid 0.56g/L, surplus are water, polishing trough tank liquor temperature
For 30 DEG C, polishing current density is 2.05A/dm2.A length of 6 minutes during polishing, high finish surface is obtained.
In electrochemical polishing process, aluminium section bar is positioned in polishing tank liquor, and conducting beam is fixedly arranged on removable anode conducting seat, is thrown
Photovoltage is 12V.
Embodiment 2
It is 120cm that 7003 aluminium alloys are made surface area2Sheet material carry out electrochemical polishing treatment, tank liquor composition is in polishing trough
Fluoboric acid 28g/L, 5.4 g/L of nitric acid, arabic acid 6.0g/L, 0.5 g/L of xanthic acid, surplus are water, polishing trough tank liquor temperature
For 30 DEG C, polishing current density is 2.05A/dm2.A length of 8 minutes during polishing, high finish surface is obtained.
In electrochemical polishing process, aluminium section bar is positioned in polishing tank liquor, and conducting beam is fixedly arranged on removable anode conducting seat, is thrown
Photovoltage is 16V.
Embodiment 3
It is 180cm that 7021 aluminium alloys are made surface area2Sheet material carry out electrochemical polishing treatment, tank liquor composition is in polishing trough
Fluoboric acid 28g/L, 5.5 g/L of nitric acid, 6.0 g/L of arabic acid, 0.55 g/L of xanthic acid, surplus are water, polishing trough tank liquor temperature
Spend for 30 DEG C, polishing current density is 2.1A/dm2.A length of 12 minutes during polishing, high finish surface is obtained.
In electrochemical polishing process, aluminium section bar is positioned in polishing tank liquor, and conducting beam is fixedly arranged on removable anode conducting seat, is thrown
Photovoltage is 24V.
Embodiment 4
The present embodiment terms and conditions is same as Example 1, polishes the Arabic gum that 2.5g/L is added in tank liquor.Its processing effect with
Embodiment 1 is identical.
Embodiment 5
The present embodiment terms and conditions is same as Example 1, polishes the xanthans that 2.5g/L is added in tank liquor.Its processing effect and reality
It is identical to apply example 1.
Embodiment 6
The present embodiment terms and conditions is same as Example 1, polishes the sodium persulfide that 0.1g/L is added in tank liquor.Its processing effect with
Embodiment 1 is identical.There is a small amount of precipitation at 10-15 rear slot bottom of polishing cycle, and the cycle period that it is used after filtering removal is than implementing
The long 1-2 cycle-index of example 1.
Embodiment 7
The present embodiment terms and conditions is same as Example 1, and handled sheet material is that surface area is 80 cm27049 aluminum alloy sheets
Material.Its processing effect is same as Example 1.
Embodiment 8
The present embodiment terms and conditions is same as Example 1, and handled sheet material is that surface area is 80 cm27050 aluminum alloy sheets
Material.Its processing effect is same as Example 1.
Embodiment 9
The present embodiment terms and conditions is same as Example 1, and handled sheet material is that surface area is 80 cm27150 aluminum alloy sheets
Material.Its processing effect is same as Example 1.
Embodiment 10
The present embodiment terms and conditions is same as Example 2, and handled sheet material is that surface area is 120 cm27055 aluminum alloy sheets
Material.Its processing effect is same as Example 2.
Embodiment 11
The present embodiment terms and conditions is same as Example 2, and handled sheet material is that surface area is 120 cm27075 aluminum alloy sheets
Material.Its processing effect is same as Example 2.
Embodiment 12
The present embodiment terms and conditions is same as Example 3, and handled sheet material is that surface area is 180 cm27175 aluminum alloy sheets
Material.Its processing effect is same as Example 3.
Embodiment 13
The present embodiment terms and conditions is same as Example 3, and handled sheet material is that surface area is 180 cm27475 aluminum alloy sheets
Material.Its processing effect is same as Example 3.
Embodiment 14
The present embodiment terms and conditions is same as Example 3, and handled sheet material is that surface area is 180 cm27085 aluminum alloy sheets
Material.Its processing effect is same as Example 3.
As can be seen from the above-described embodiment, the fluoboric acid electrochemical polishing process in the present invention can have aluminium section bar
The bloom polishing of effect, has extraordinary polishing effect especially for 7 line aluminium alloys of the Zn content more than 5wt%.
It is last it should be noted that above example only to illustrate the technical solution of the embodiment of the present invention rather than to its into
Row limitation, although the embodiment of the present invention is described in detail with reference to preferred embodiment, those of ordinary skill in the art
It should be understood that still can be to the technical solution technical scheme is modified or replaced equivalently of the embodiment of the present invention, and these are changed or wait
The scope of amended technical solution disengaging technical solution of the embodiment of the present invention cannot also be made with replacement.
Claims (10)
- A kind of 1. bloom aluminium section bar electrochemical polishing treatment technique, it is characterised in that：Tank liquor composition is fluoboric acid 25-28g/L, nitric acid 5-5.5 g/L, arabic acid 6.0-6.1 g/L, xanthic acid in polishing trough 0.5-0.6 g/L, surplus are water, and polishing trough tank liquor temperature is 25-35 DEG C, and polishing current density is 2.0-2.1A/dm2；In electrochemical polishing process, aluminium section bar is positioned in polishing tank liquor, and conducting beam is fixedly arranged on removable anode conducting seat；When Single aluminium shape surface product to be processed is less than 100cm2, polish voltage and be no more than 15V；When single aluminium shape surface to be processed Product is more than or equal to 100cm2, less than or equal to 160cm2, it polishes voltage and is not less than 15V, not higher than 20V；When single aluminium to be processed Surface of profile product is more than 160cm2, it polishes voltage and is not less than 20V, no more than 35V；Aluminium section bar is superconducting tilting suspension in electrochemical polishing process, its suspension angles is in 15-18 ° with conducting beam；Aluminium section bar is in electrification 10-15min is toasted in 80-85 DEG C of baking oven before optical polishing processing.
- 2. bloom aluminium section bar electrochemical polishing treatment technique as claimed in claim 1, it is characterised in that：The polishing trench bottom is set There is a heat exchange copper tube, unicom external heat source in the copper pipe.
- 3. bloom aluminium section bar electrochemical polishing treatment technique as claimed in claim 1, it is characterised in that：Tank liquor in the polishing trough Inside also add the Arabic gum or xanthans of 2-3g/L.
- 4. bloom aluminium section bar electrochemical polishing treatment technique as claimed in claim 1, it is characterised in that：Tank liquor in the polishing trough Inside also add the sodium persulfide of 0.1-0.15g/L.
- 5. bloom aluminium section bar electrochemical polishing treatment technique as claimed in claim 1, it is characterised in that：At the electrochemical polish In science and engineering skill, fluoboric acid working concentration requires supplementation with polishing trough tank liquor when being less than 18 g/L.
- 6. bloom aluminium section bar electrochemical polishing treatment technique as claimed in claim 5, it is characterised in that：The polishing trough tank liquor is mended Charge is the 15-20% of former volume of bath solution.
- 7. bloom aluminium section bar electrochemical polishing treatment technique as claimed in claim 1, it is characterised in that：In the polishing trough tank liquor Molten aluminum amount is not more than 6g/L.
- 8. bloom aluminium section bar electrochemical polishing treatment technique as claimed in claim 1, it is characterised in that：The polishing trough groove body side Wall is equipped with rotation blender.
- 9. bloom aluminium section bar electrochemical polishing treatment technique as claimed in claim 1, it is characterised in that：The removable anode is led Mobile 15-20 weeks per minute of electric seat.
- 10. bloom aluminium section bar electrochemical polishing treatment technique as claimed in claim 1, it is characterised in that：The electrochemical polish Treatment process is suitable for 7001,7003,7021,7049,7050,7150,7055,7075,7175,7475,7085 aluminium alloys.
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| CN106826437A (en) * | 2016-12-16 | 2017-06-13 | 安徽宝恒新材料科技有限公司 | A kind of preparation method of corrosion-resistant 8K plates |
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2017
- 2017-12-07 CN CN201711288575.8A patent/CN107937976A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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