CN106676610A - Surface treatment process for aluminium alloy sections - Google Patents
Surface treatment process for aluminium alloy sections Download PDFInfo
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- CN106676610A CN106676610A CN201611246319.8A CN201611246319A CN106676610A CN 106676610 A CN106676610 A CN 106676610A CN 201611246319 A CN201611246319 A CN 201611246319A CN 106676610 A CN106676610 A CN 106676610A
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- Prior art keywords
- electrophoresis
- aluminium alloy
- groove
- temperature
- time
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- 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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Classifications
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/04—Electrophoretic coating characterised by the process with organic material
Abstract
The invention discloses a surface treatment process for aluminium alloy sections. The surface treatment process is characterized by comprising the following steps: (1) placing the aluminium alloy sections in an electrophoresis hot water tank for electrophoresis for 4-8 min; (2) placing the aluminium alloy sections in an electrophoresis cold water tank for electrophoresis for 2-4 min; (3) placing the aluminium alloy sections in an electrophoresis tank with solids of 5-8 g/l, the pH of 7.4-8.0, the conductivity of 400-800 [mu]s/cm, the voltage of 90-140 V, and the temperature of 20-22 DEG C, and performing electrophoresis for 80-180 s with the acid value of 45-55 EMO/100 g and the amine value of 23-27 EMO/100 g; (4) arranging an RO1 tank and an RO2 tank, wherein the RO2 tank has the solids of less than 0.3%, the temperature of 25 DEG C (normal temperature), the pH of 8.5-9, and the conductivity of 150 [mu]s/cm, and the aluminium alloy sections are soaked in the RO2 tank for 1-2 min; (5) placing the aluminium alloy sections in a dripping area, wherein the dripping time is 10-20 min; and (6) performing solidification.
Description
Technical field
The invention belongs to technical field of metal surface processing, and in particular to a kind of technique for surface treatment of aluminium alloy sections.
Background technology
With quickly propelling for the large-scale capital expenditure of China and process of industrialization, the yield of the aluminium section bar whole industry and disappear
Expense amount rapidly increases, and China also suddenly becomes aluminium section bar production base and consumption market maximum in the world, through up near
The rapid growth of 10 years, China's aluminum profile industry has stepped into new developmental stage, and has shown many new development trends.
Domestic industry aluminium profile market demand will be more than 4,000,000 tons within 2012.In future, aluminium section bar is in the application space of industrial circle by ten
Divide huge, in existing 124 branchs of industry of China, there are 113 departments to use aluminum products, proportion is 91%.Aluminium section bar is
A kind of younger metal material, in 20 beginnings of the century commercial Application is just started.During World War II, aluminium section bar is mainly used
In manufacture military aircraft.After the war, because war industry is die-offed to the demand of aluminium section bar, aluminum i ndustry circle just starts to develop domestic aluminium
Section bar so as to range of application by aircraft industry expand to building industry, container package industry, transportation, electric power and electronics industry,
The each department of national economy such as machinery manufacturing industry and petrochemical industry, is applied in the middle of daily life.Now, the use of aluminium section bar
As many as amount, scope is wide, is only second to iron and steel, becomes second largest metal material.In prior art aluminium alloy extrusions coating surface without
Film in method, i.e., cannot form effective protecting film in coating surface, coating performance, and referring mainly to weatherability, wearability etc. cannot expire
Sufficient customer demand.
The content of the invention
For the problems referred to above, the present invention provides a kind of technique for surface treatment of aluminium alloy sections, and the technical scheme for being adopted is such as
Under：
A kind of technique for surface treatment of aluminium alloy sections, it is characterised in that comprise the following steps：
(1) aluminium alloy extrusions is placed in electrophoresis hot water storgae, 60~80 DEG C of the hot water storgae temperature, the μ s/ of electrical conductivity ＜ 100
Cm, pH value 6~7, electrophoresis time is 4~8 minutes；
(2) aluminium alloy extrusions is slowly hung material to be placed in electrophoresis cold rinse bank, the cold rinse bank temperature be 25 DEG C of room temperature, pH value
6~7, the μ s/cm of electrical conductivity ＜ 100, electrophoresis time is 2~4 minutes；
(3) aluminium alloy extrusions is slowly hung material to be placed in electrophoresis tank, 5~8g/l of solid point in the electrophoresis tank, pH value is
7.4~8.0, electrical conductivity is 400~800 μ s/cm, 90~140V of voltage, and temperature is 20 DEG C~22 DEG C in electrophoresis tank；Electrophoresis time
For 80~180s, 45~55EMO/100g of acid number；23~27EMO/100g of amine number；
(4) RO is set1Groove and RO2Groove, the RO1Solid part ＜ 2% in groove, temperature be 25 DEG C of room temperature, pH value be 8~
8.5, electrical conductivity ＜ 200us/cm；The RO2Solid part ＜ 0.3% in groove, temperature is 25 DEG C of room temperature, and pH value is 8.5~9, electricity
The μ s/cm of conductance ＜ 150, the aluminium alloy extrusions is in RO2Soak time 1~2 minute in groove；
(5) aluminium alloy extrusions is placed in into area of dripping, drips the time for 10~20 minutes；
(6) solidify
Impurity in cleaning curing oven hearth box, it is ensured that free from dust floats over interior curing oven inwall, stove, upper capping and furnace bottom face,
Solidification temperature is 180 DEG C, and hardening time is 25~35 minutes.
Preferably, step (3) the electrophoresis tank voltage is 120V, and electrophoresis time is 120s.
Preferably, the electrophoresis hot water storgae, electrophoresis cold rinse bank, electrophoresis tank, RO1Groove and RO2Groove when in use, air is arranged
Can power-on operation after going out；Electrophoresis terminate after grooving immediately.
Preferably, the RO1、RO2Groove is filtration cycle system retracting device, and washing time is 1~2 minute, the RO2
Groove is when groove is gone out by water drip-dry as far as possible.
Preferably, it is described drip during, the empty dry water droplet remained in above the section bar.
Beneficial effects of the present invention are：The present invention can realize carrying out oxidation electrophoresis to aluminium alloy extrusions using above-mentioned technique
Process, acid and alkali resistance, salt contamination corrosion and the paint hardness of aluminium alloy extrusions is improved, while extending the use longevity of aluminium alloy extrusions
Life.
Specific embodiment
Below in conjunction with most preferred embodiment, the invention will be further described.
Embodiment 1
A kind of technique for surface treatment of aluminium alloy sections, comprises the following steps：
(1) aluminium alloy extrusions is placed in electrophoresis hot water storgae, the hot water storgae temperature 60 C, the μ s/cm of electrical conductivity ＜ 100,
PH value is 6, and electrophoresis time is 4 minutes；
(2) aluminium alloy extrusions is placed in electrophoresis cold rinse bank, the cold rinse bank temperature is 25 DEG C of room temperature, and pH value is 6, conductance
The μ s/cm of rate ＜ 100, electrophoresis time is 2 minutes；According to the temperature control time of tank, overproof water quality will in time change water；
(3) aluminium alloy extrusions is placed in electrophoresis tank, solid point 5g/l in the electrophoresis tank, pH value is 7.4, and electrical conductivity is
400 μ s/cm, voltage 90V, temperature is 20 DEG C in electrophoresis tank；Electrophoresis time is 80s, acid number 45EMO/100g；Amine number 23EMO/
100g；The composite film thickness of formation is 16 μm；
Hang and expect to answer slow into groove, can power-on operation after air is discharged.Electrophoresis terminate after grooving immediately, it is impossible to it is long
Time soaks, in case paint liquid has decomposed to do the paint drop of Surface of profile after material can just leave electrophoresis tank later.Reduce electrophoretic paint
Yield, equipment should ensure that long-term operating during long-term production.When such as shutting down because of stopping production or equipment, should ensure that before start
Tank liquor is circulated in 5~6 hours and could normally produced.
(4) RO is set1Groove and RO2Groove, the RO1Solid part ＜ 2% in groove, temperature is 25 DEG C of room temperature, and pH value is 8, conductance
Rate ＜ 200us/cm；The RO2Solid part ＜ 0.3% in groove, temperature is 25 DEG C of room temperature, and pH value is 8.5, the μ s/ of electrical conductivity ＜ 150
Cm, the aluminium alloy extrusions is in RO2Soak time 1~2 minute in groove；
The RO1、RO2Groove filtration cycle system retracting device, equipment keeps long-term operating, washing time 1~2 minute, type
Material can not for a long time in drill traverse bubble, to reduce paint film decomposition, it is ensured that groove face is clean, RO2Groove when groove is gone out by water drip-dry as far as possible,
Reduce and waste.
(5) aluminium alloy extrusions is placed in into area of dripping, drips the time for 10~20 minutes；Wanting according to climate temperature
Ask, as far as possible the superincumbent water droplet of empty dry residual.Prevent dust and harmful gass from corroding (such as acid gas, alkali gas as far as possible during section bar sky water
Deng), empty pool ground should at any time keep moistening clean.
(6) solidify
Impurity in cleaning curing oven hearth box, it is ensured that free from dust floats over interior curing oven inwall, stove, upper capping and furnace bottom face.
In order to avoid section bar solidification when due to air stirring, dust is trickled down on Surface of profile, cause surface quality defect occur, solidify
Temperature is 180 DEG C, 30 minutes hardening times, hardness of paint film ＞ 3H.
Embodiment 2
A kind of technique for surface treatment of aluminium alloy sections, comprises the following steps：
(1) aluminium alloy extrusions is placed in electrophoresis hot water storgae, 80 DEG C of the hot water storgae temperature, the μ s/cm of electrical conductivity ＜ 100,
PH value 7, electrophoresis time is 8 minutes；
(2) aluminium alloy extrusions is placed in electrophoresis cold rinse bank, the cold rinse bank temperature be 25 DEG C of room temperature, pH value 7, electrical conductivity
The μ s/cm of ＜ 100, electrophoresis time is 4 minutes；According to the temperature control time of tank, overproof water quality will in time change water；
(3) aluminium alloy extrusions is placed in electrophoresis tank, solid point 8g/l in the electrophoresis tank, pH value is 8.0, and electrical conductivity is
800 μ s/cm, voltage 140V, temperature is 22 DEG C in electrophoresis tank；Electrophoresis time is 180s, acid number 55EMO/100g；Amine number 27EMO/
100g；The composite film thickness of formation is 18 μm；
Hang and expect to answer slow into groove, can power-on operation after air is discharged.Electrophoresis terminate after grooving immediately, it is impossible to it is long
Time soaks, in case paint liquid has decomposed to do the paint drop of Surface of profile after material can just leave electrophoresis tank later.Reduce electrophoretic paint
Yield, equipment should ensure that long-term operating during long-term production.When such as shutting down because of stopping production or equipment, should ensure that before start
Tank liquor is circulated in 5~6 hours and could normally produced.
(4) RO is set1Groove and RO2Groove, the RO1Solid part ＜ 2% in groove, temperature is 25 DEG C of room temperature, and pH value is 8.5, electricity
Conductance ＜ 200us/cm；The RO2Solid part ＜ 0.3% in groove, temperature is 25 DEG C of room temperature, and pH value is 9, the μ s/ of electrical conductivity ＜ 150
Cm, the aluminium alloy extrusions is in RO2Soak time 2 minutes in groove；
The RO1、RO2Groove filtration cycle system retracting device, equipment keeps long-term operating, washing time 1~2 minute, type
Material can not long-time in drill traverse bubble, to reduce paint film decomposition, it is ensured that groove face is clean, RO2 grooves when groove is gone out by water drip-dry as far as possible,
Reduce and waste.
(5) aluminium alloy extrusions is placed in into area of dripping, drips the time for 10~20 minutes；Wanting according to climate temperature
Ask, as far as possible the superincumbent water droplet of empty dry residual.Prevent dust and harmful gass from corroding (such as acid gas, alkali gas as far as possible during section bar sky water
Deng), empty pool ground should at any time keep moistening clean.
(6) solidify
Impurity in cleaning curing oven hearth box, it is ensured that free from dust floats over interior curing oven inwall, stove, upper capping and furnace bottom face.
In order to avoid section bar solidification when due to air stirring, dust is trickled down on Surface of profile, cause surface quality defect occur, solidify
Temperature is 180 DEG C, 30 minutes hardening times, hardness of paint film ＞ 3H.
Embodiment 3
A kind of technique for surface treatment of aluminium alloy sections, comprises the following steps：
(1) aluminium alloy extrusions is placed in electrophoresis hot water storgae, the hot water storgae temperature 70 C, the μ s/cm of electrical conductivity ＜ 100,
PH value 6.5, electrophoresis time is 6 minutes；
(2) aluminium alloy extrusions is placed in electrophoresis cold rinse bank, the cold rinse bank temperature be 25 DEG C of room temperature, pH value 6.5, conductance
The μ s/cm of rate ＜ 100, electrophoresis time is 3 minutes；According to the temperature control time of tank, overproof water quality will in time change water；
(3) aluminium alloy extrusions is placed in electrophoresis tank, solid point 6g/l in the electrophoresis tank, pH value is 7.8, and electrical conductivity is
600 μ s/cm, voltage is 120V, and temperature is 21 DEG C in electrophoresis tank；Electrophoresis time is 120s, acid number 50EMO/100g；Amine number
25EMO/100g；The composite film thickness of formation is 17 μm；
Hang and expect to answer slow into groove, can power-on operation after air is discharged.Electrophoresis terminate after grooving immediately, it is impossible to it is long
Time soaks, in case paint liquid has decomposed to do the paint drop of Surface of profile after material can just leave electrophoresis tank later.Reduce electrophoretic paint
Yield, equipment should ensure that long-term operating during long-term production.When such as shutting down because of stopping production or equipment, should ensure that before start
Tank liquor is circulated in 5~6 hours and could normally produced.
(4) RO is set1Groove and RO2Groove, the RO1Solid part ＜ 2% in groove, temperature is 25 DEG C of room temperature, and pH value is 8.3, electricity
Conductance ＜ 200us/cm；The RO2Solid part ＜ 0.3% in groove, temperature is 25 DEG C of room temperature, and pH value is 8.8, the μ of electrical conductivity ＜ 150
S/cm, the aluminium alloy extrusions is in RO2Soak time 1~2 minute in groove；
The RO1、RO2Groove filtration cycle system retracting device, equipment keeps long-term operating, washing time 1~2 minute, type
Material can not long-time in drill traverse bubble, to reduce paint film decomposition, it is ensured that groove face is clean, RO2 grooves when groove is gone out by water drip-dry as far as possible,
Reduce and waste.
(5) aluminium alloy extrusions is placed in into area of dripping, drips the time for 10~20 minutes；Wanting according to climate temperature
Ask, as far as possible the superincumbent water droplet of empty dry residual.Prevent dust and harmful gass from corroding (such as acid gas, alkali gas as far as possible during section bar sky water
Deng), empty pool ground should at any time keep moistening clean.
(6) solidify
Impurity in cleaning curing oven hearth box, it is ensured that free from dust floats over interior curing oven inwall, stove, upper capping and furnace bottom face.
In order to avoid section bar solidification when due to air stirring, dust is trickled down on Surface of profile, cause surface quality defect occur, solidify
Temperature is 180 DEG C, 30 minutes hardening times, hardness of paint film ＞ 3H.
Three embodiments of the present invention have been described in detail above, but the content is only the preferable enforcement of the present invention
Example, it is impossible to be considered as the practical range for limiting the present invention.All impartial changes made according to the present patent application scope and improvement
Deng, all should still belong to the present invention patent covering scope within.
Claims (5)
1. a kind of technique for surface treatment of aluminium alloy sections, it is characterised in that comprise the following steps：(1) aluminium alloy extrusions is placed in
In electrophoresis hot water storgae, 60~80 DEG C of the hot water storgae temperature, the μ s/cm of electrical conductivity ＜ 100, pH value 6~7, electrophoresis time is 4~8
Minute；
(2) aluminium alloy extrusions is slowly hung material to be placed in electrophoresis cold rinse bank, the cold rinse bank temperature be 25 DEG C of room temperature, pH value 6~
7, the μ s/cm of electrical conductivity ＜ 100, electrophoresis time is 2~4 minutes；
(3) aluminium alloy extrusions slowly being hung material to be placed in electrophoresis tank, solid point 5~8g/l in the electrophoresis tank, pH value is 7.4~
8.0, electrical conductivity is 400~800 μ s/cm, 90~140V of voltage, and temperature is 20 DEG C~22 DEG C in electrophoresis tank；Electrophoresis time is 80
~180s, 45~55EMO/100g of acid number；23~27EMO/100g of amine number；
(4) RO is set1Groove and RO2Groove, the RO1Solid part ＜ 2% in groove, temperature is 25 DEG C of room temperature, and pH value is 8~8.5, electricity
Conductance ＜ 200us/cm；The RO2Solid part ＜ 0.3% in groove, temperature is 25 DEG C of room temperature, and pH value is 8.5~9, electrical conductivity ＜
150 μ s/cm, the aluminium alloy extrusions is in RO2Soak time 1~2 minute in groove；
(5) aluminium alloy extrusions is placed in into area of dripping, drips the time for 10~20 minutes；
(6) solidify
Impurity in cleaning curing oven hearth box, it is ensured that free from dust floats over interior curing oven inwall, stove, upper capping and furnace bottom face, solidification
Temperature is 180 DEG C, and hardening time is 25~35 minutes.
2. a kind of technique for surface treatment of aluminium alloy sections according to claim 1, it is characterised in that step (3) electricity
Swimming tank voltage is 120V, and electrophoresis time is 120s.
3. a kind of technique for surface treatment of aluminium alloy sections according to claim 1, it is characterised in that the electrophoresis hot water
Groove, electrophoresis cold rinse bank, electrophoresis tank, RO1Groove and RO2Groove when in use, can power-on operation after air is discharged；Electrophoresis is tied
Grooving immediately after beam.
4. a kind of technique for surface treatment of aluminium alloy sections according to claim 1, it is characterised in that the RO1、RO2Groove is
Filtration cycle system retracting device, washing time is 1~2 minute, the RO2Groove is when groove is gone out by water drip-dry as far as possible.
5. a kind of technique for surface treatment of aluminium alloy sections according to claim 1, it is characterised in that the process of dripping
In, the empty dry water droplet remained in above the section bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611246319.8A CN106676610A (en) | 2016-12-29 | 2016-12-29 | Surface treatment process for aluminium alloy sections |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611246319.8A CN106676610A (en) | 2016-12-29 | 2016-12-29 | Surface treatment process for aluminium alloy sections |
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| Publication Number | Publication Date |
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| CN106676610A true CN106676610A (en) | 2017-05-17 |
Family
ID=58872526
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611246319.8A Pending CN106676610A (en) | 2016-12-29 | 2016-12-29 | Surface treatment process for aluminium alloy sections |
Country Status (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107699757A (en) * | 2017-11-30 | 2018-02-16 | 福建旭晖铝业有限公司 | A kind of high-strength wearable electrophoretic aluminium section and preparation method thereof |
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|---|---|---|---|---|
| CN2446134Y (en) * | 2000-09-05 | 2001-09-05 | 张振华 | Aluminium profile |
| CN1318656A (en) * | 2001-04-16 | 2001-10-24 | 龙口市金穗铜铝材厂 | Nanometer treatment method of aluminium shape surface |
| CN101220497A (en) * | 2007-01-09 | 2008-07-16 | 臧明华 | Simulation stainless steel process technique for aluminum alloy material surface |
| WO2009023690A1 (en) * | 2007-08-15 | 2009-02-19 | Ppg Industries Ohio, Inc. | Electrodeposition coatings for use over aluminum substrates |
| CN102703899A (en) * | 2012-06-25 | 2012-10-03 | 郑州煤矿机械集团股份有限公司 | Surface treatment process for hydraulic support intermediate cylinder, plunger and piston rod used under coalmine well |
| CN103820835A (en) * | 2013-11-12 | 2014-05-28 | 浙江卓逸铝业有限公司 | Color electrophoretic coating process of aluminum alloy sections |
| CN105112923A (en) * | 2015-08-04 | 2015-12-02 | 安徽科蓝特铝业有限公司 | High-weather-resistance aluminum alloy section and manufacturing process thereof |
| US20160160055A1 (en) * | 2013-07-10 | 2016-06-09 | Chemetall Gmbh | Method for Coating Metal Surfaces of Substrates and Objects Coated in Accordance With Said Method |
-
2016
- 2016-12-29 CN CN201611246319.8A patent/CN106676610A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2446134Y (en) * | 2000-09-05 | 2001-09-05 | 张振华 | Aluminium profile |
| CN1318656A (en) * | 2001-04-16 | 2001-10-24 | 龙口市金穗铜铝材厂 | Nanometer treatment method of aluminium shape surface |
| CN101220497A (en) * | 2007-01-09 | 2008-07-16 | 臧明华 | Simulation stainless steel process technique for aluminum alloy material surface |
| WO2009023690A1 (en) * | 2007-08-15 | 2009-02-19 | Ppg Industries Ohio, Inc. | Electrodeposition coatings for use over aluminum substrates |
| CN102703899A (en) * | 2012-06-25 | 2012-10-03 | 郑州煤矿机械集团股份有限公司 | Surface treatment process for hydraulic support intermediate cylinder, plunger and piston rod used under coalmine well |
| US20160160055A1 (en) * | 2013-07-10 | 2016-06-09 | Chemetall Gmbh | Method for Coating Metal Surfaces of Substrates and Objects Coated in Accordance With Said Method |
| CN103820835A (en) * | 2013-11-12 | 2014-05-28 | 浙江卓逸铝业有限公司 | Color electrophoretic coating process of aluminum alloy sections |
| CN105112923A (en) * | 2015-08-04 | 2015-12-02 | 安徽科蓝特铝业有限公司 | High-weather-resistance aluminum alloy section and manufacturing process thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107699757A (en) * | 2017-11-30 | 2018-02-16 | 福建旭晖铝业有限公司 | A kind of high-strength wearable electrophoretic aluminium section and preparation method thereof |
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Application publication date: 20170517 |