CN107119306A - A kind of production technology of electrophoretic coating aluminium section bar - Google Patents
A kind of production technology of electrophoretic coating aluminium section bar Download PDFInfo
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- CN107119306A CN107119306A CN201710280612.4A CN201710280612A CN107119306A CN 107119306 A CN107119306 A CN 107119306A CN 201710280612 A CN201710280612 A CN 201710280612A CN 107119306 A CN107119306 A CN 107119306A
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- Prior art keywords
- section bar
- aluminium section
- production technology
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- rinsing bowl
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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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
-
- 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
- C25D13/20—Pretreatment
-
- 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
- C25D13/22—Servicing or operating apparatus or multistep processes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention provides a kind of production technology of electrophoretic coating aluminium section bar, the production technology is comprised the following steps：Step 1, degreasing, alkaline etching, neutralization, anodic oxidation, cleaning treatment are carried out successively to aluminium section bar；Step 2, the aluminium section bar is placed in electrophoresis tank by the aluminium section bar after step 1 is handled, and is powered, and the resin film of densification is formed in the aluminium shape surface；The pH value of the electrophoresis tank internal solvent is 7.0 7.8；Step 3, wash, the aluminium section bar is sequentially placed into the first rinsing bowl and the second rinsing bowl is cleaned；The tank liquor pH value of first rinsing bowl is 8.0 9.0；The tank liquor pH value of second rinsing bowl is 8.5 9.5；Step 4, the aluminium section bar is dried, drying temperature is 170 180 DEG C, drying time>40min；It is sequentially completed after step 1 step 4, you can obtain the finished product of electrophoretic coating aluminium section bar.According to above-mentioned technique, the yield rate of electrophoretic coating aluminium section bar is remarkably improved.
Description
Technical field
The present invention relates to technical field of aluminum alloy technology, more particularly to a kind of production technology of electrophoretic coating aluminium section bar.
Background technology
As living standards of the people are improved, market demand variation, aluminium section bar is anodized and electrolytic coloring after carry out again
Electrophoretic painting, there is double shielding.With high transparency, high metallic texture, high anti-corrosion and high-weatherability feature, than spray painting, powder spray
Apply more ornamental, be greatly favored by consumers, enter house decoration extensively, potential market is very big.
However, the founding shrinkage cavity caused due to the high transparency of electrophoretic paint；Black that lime-ash is caused, black line, coarse-grain；Mould
Extrude cause coarse groove, collide with, scratch, combination die coarse-grain line, blackspot, hickie；Design of scattered small flowers and plants that heat tinting process is caused, speckle,
Washmarking；Dust burr, dross and the male and female face and the high defect of porosity that environmental condition is caused all leak and cause yield rate
It is relatively low.
Therefore, in order to solve the problem of prior art yield rate is relatively low, basis of the present invention based on existing process there is provided
A kind of production technology of new electrophoretic coating aluminium section bar, it is to avoid the quality problem in production process, controls finished product tone evenness,
Significantly improve the yield rate of electrophoretic coating aluminium section bar.
The content of the invention
In order to overcome the defect of above-mentioned technology, it is an object of the invention to provide a kind of new electrophoretic coating aluminium section bar production
Technique, stable production process, finished product uniform hue significantly improves the yield rate of electrophoretic coating aluminium section bar.
The invention provides a kind of production technology of electrophoretic coating aluminium section bar, the production technology is comprised the following steps：
Step 1, degreasing, alkaline etching, neutralization, anodic oxidation, cleaning treatment are carried out successively to aluminium section bar；
Step 2, the aluminium section bar is placed in electrophoresis tank by the aluminium section bar after step 1 is handled, and is powered, described
Aluminium shape surface forms the resin film of densification；The pH value of the electrophoresis tank internal solvent is 7.0-7.8；
Step 3, wash, the aluminium section bar is sequentially placed into the first rinsing bowl and the second rinsing bowl is cleaned；Described
The tank liquor pH value of one rinsing bowl is 8.0-9.0；The tank liquor pH value of second rinsing bowl is 8.5-9.5；
Step 4, the aluminium section bar is dried, drying temperature is 170-180 DEG C, drying time>40min
It is sequentially completed after the step 1- steps 5, you can obtain the finished product of the electrophoretic coating aluminium section bar.
Preferably, the detergent concentration used in the degreasing is 15-30g/L, and the cleaning agent fluoro-containing concentration is 0.6-
1.2g/L。
Preferably, the alkaline solution used in the alkaline etching includes sodium hydroxide, and the concentration of the sodium hydroxide is 35-
45g/L。
Preferably, the acid solution used in the neutralization includes sulfuric acid, and the concentration of the sulfuric acid is 100-120g/L.
Preferably, the electrolyte used in the anodic oxidation is 145-165g/L sulfuric acid and content ＜ 30g/ comprising concentration
L aluminium ion.
Preferably, the cleaning treatment is washed using hot pure water.
Preferably, in step 2, the electrical conductivity that the electrophoresis is used is 500-900 μ s, and electrophoresis temperature is 18-22 DEG C, electrophoresis
Voltage is 120-130V.
Preferably, in step 3, the solid content of first rinsing bowl<1.0%, the electrical conductivity of first rinsing bowl<
250μs；The solid content of second rinsing bowl<0.3%, the electrical conductivity of second rinsing bowl<150μs.
Preferably, after being washed through step 3, the water mark of aluminium shape surface, flash-off time ＞ 20min are dried.
Preferably, described aluminium section bar includes silicon, copper, magnesium, zinc, titanium, chromium, iron and aluminium；Wherein, the content of the silicon is
0.3%-0.5%, content≤0.08% of the copper, the content of the magnesium is 0.45-0.8%, the content of the zinc≤
0.05%, content≤0.05% of the titanium, content≤0.05% of the chromium, content≤0.35% of the iron.
Compared with prior art, the technical advantages of the present invention are that：
1. joined by improving specific technique in degreasing, alkaline etching, neutralization, anodic oxidation, washing, electrophoresis, baking step
Number, optimizes the production technology of electrophoretic coating aluminium section bar；
2. the quality problem in production process is prevented effectively from, so as to improve the yield rate of electrophoretic aluminium section.
Embodiment
Advantages of the present invention is expanded on further below in conjunction with specific embodiment.
The aluminium section bar used in a kind of production technology of electrophoretic coating aluminium section bar provided by the present invention, the production technology is former
Material includes silicon, copper, magnesium, zinc, titanium, chromium, iron and aluminium；Wherein, the content of silicon be 0.3%-0.5%, content≤0.08% of copper,
The content of magnesium be 0.45-0.8%, content≤0.05% of zinc, content≤0.05% of titanium, content≤0.05% of chromium, iron
Content≤0.35%, remaining is Al.Using above-mentioned raw material ratio, contribute to the aluminium section bar produced have tensile strength it is high,
The advantages of yield strength is high, elongation percentage is high.
Specific production technology comprises the following steps：
Step 1, upper folder.Aluminium section bar is bundled on bin with special fixture.Wherein, conducting rod conducting position polishing light
Sliding, no paint film keeps well conducting, and upper clip-type material keeps gradient to be 5-10 degree, and in a preferred embodiment, upper clip-type material is protected
Gradient is held for 8-10 degree.
Step 2, degreasing.Aluminium section bar is soaked in bright cleaning agent, for removing the oil stain of aluminium shape surface and other
Attachment, loose section bar.Wherein, the Oil repellent concentration in bright 15~30g/L of detergent concentration, cleaning agent is 0.6~1.2g/
L, soak time 2-5min；In a preferred embodiment, the bright detergent concentration used is 16~28g/L, in cleaning agent
Oil repellent concentration is 0.8~1.0g/L, soak time 4min.
Step 3, alkaline etching.Aluminium section bar is put into alkaline solution, corrosion product or oxidation for removing aluminium shape surface
Film.Wherein, alkaline solution is that the naoh concentration in sodium hydroxide solution, solution is aluminium ion in 35-45g/L, solution
Content is 30~60g/L, and it is 40-50 DEG C to control tank liquor temperature, and the time of alkaline etching is 2-5min.
Step 4, neutralize.Aluminium section bar after being handled through alkaline etching is soaked in acid solution, aluminium profiles is attached to for removing
Ash shape thing on material surface.Wherein, acid solution is the sulfuric acid concentration 100-120g/L in sulfuric acid solution, solution, aluminium section bar leaching
It is 2-5min to steep the time in acid solution.In a preferred embodiment, the sulfuric acid concentration used is 105-115g/L, immersion
Time is 3-4min.
Step 5, anodic oxidation.Aluminium section bar is soaked in electrolyte, one layer is produced in Surface of profile by anodic oxidation
Oxide-film with fenestra.Wherein, sulfuric acid concentration contained in electrolyte is 145-1651g/L, aluminium composition ＜ 30g/L,
Electrolysis temperature is 17-21 DEG C, current density 120-130A/m2.In a preferred embodiment, institute's sulfur acid in the electrolyte of selection
Concentration be 152-158g/L, aluminium composition ＜ 30g/L, electrolysis temperature be 18-20 DEG C, current density 125A/m2。
Step 6, wash.Traveling one is entered to the aluminium section bar after anodized for 70-80 DEG C of hot water using water temperature
Step cleaning, the liquid of pre-treatment residual is removed, prevents from polluting in subsequent step.Wherein, the pH value for controlling water is 5.5
~6.5, washing time 2-5min.In a preferred embodiment, the water temperature that washing is used is 72-78 DEG C, and the pH value for controlling water is
6.0~6.5, washing time is 5min.
Step 7, electrophoresis.Aluminium section bar after step 6 is handled is placed in electrophoresis tank, is powered, in the aluminium shape surface
Form fine and close resin film.Wherein, the pH value of electrophoresis liquid be 7.0-7.8, electrical conductivity 500-900 μ s, Gu composition 5-7%, electrophoresis
Temperature is 18-22 DEG C, and electrophoretic voltage is 120-130V.In a preferred embodiment, the pH value 7.5 of electrophoresis liquid, electrical conductivity 600-
800 μ s, Gu composition 5.2-6%, electrophoresis temperature is 19-21 DEG C, electrophoretic voltage is 122-128V.
Step 8, wash.Aluminium section bar after electrophoretic process is sequentially placed into the first rinsing bowl and the second rinsing bowl is carried out clearly
Wash.Tank liquor management and control requirement：The tank liquor pH value for controlling the first rinsing bowl is 8.0-9.0, and the tank liquor pH value for controlling the second rinsing bowl is
8.5-9.5.First rinsing bowl solid content<1.0%, the second rinsing bowl solid content<0.3%, the first rinsing bowl electrical conductivity<250 μ s,
Second rinsing bowl electrical conductivity<150 μ s, washing time ＞ 60s.In a preferred embodiment, in the first rinsing bowl tank liquor pH value
For 8.2~8.8, the pH value 8.7~9.3 of tank liquor, the first rinsing bowl solid content in the second rinsing bowl<1.0%, the second rinsing bowl is consolidated
Composition<0.3%, the first rinsing bowl electrical conductivity<250 μ s, the second rinsing bowl electrical conductivity<150 μ s, washing time ＞ 60s.
Step 9, dry.Dry the water mark of aluminium shape surface, flash-off time ＞ 20min.
Step 10, dry.Aluminium section bar is toasted, the paint film resin that its surface is generated by electrophoresis is produced glue chain reaction, paint film
Curing, reaches certain weather resisteant, physical property and chemical-resistance.Wherein, the temperature for controlling drying is 170-180 DEG C, drying
Time is more than 40min.In a preferred embodiment, the temperature control of drying is at 172-178 DEG C, drying time be 40min with
On.
It is sequentially completed the finished product that step 1- steps 10 can obtain electrophoretic coating aluminium section bar., can by above-mentioned process
Aberration is produced to be prevented effectively from finished product, it is ensured that the uniform hue of product, coating salt fog resistance is stronger, so as to significantly improve electricity
The yield rate of swimming japanning section bar.
Present invention improves degreasing, alkaline etching, neutralization, anodic oxidation, washing, electrophoresis, baking step specific process parameter,
It is possible to prevente effectively from the quality problem in production process, so that the yield rate of electrophoretic aluminium section is improved, the resisting salt fog corrosion of coating
Property is stronger.Electrodeposition coated profiles high yield rate according to production technology institute of the present invention output reaches 99%-99.5%, and tone is equal
Even, resisting salt fog corrosion grade can reach 10 grades.
It should be noted that embodiments of the invention have preferably implementation, and any type of not is made to the present invention
Limitation, any one skilled in the art changes or is modified to possibly also with the technology contents of the disclosure above equivalent effective
Embodiment, as long as without departing from the content of technical solution of the present invention, what the technical spirit according to the present invention was made to above example
Any modification or equivalent variations and modification, in the range of still falling within technical solution of the present invention.
Claims (10)
1. a kind of production technology of electrophoretic coating aluminium section bar, it is characterised in that
The production technology is comprised the following steps：
Step 1, degreasing, alkaline etching, neutralization, anodic oxidation, cleaning treatment are carried out successively to aluminium section bar；
Step 2, the aluminium section bar after step 1 is handled is placed in electrophoresis tank, is powered, and is caused in aluminium shape surface formation
Close resin film；The pH value of the electrophoresis tank internal solvent is 7.0-7.8；
Step 3, wash, the aluminium section bar is sequentially placed into the first rinsing bowl and the second rinsing bowl is cleaned；First water
The tank liquor pH value of washing trough is 8.0-9.0；The tank liquor pH value of second rinsing bowl is 8.5-9.5；
Step 4, the aluminium section bar is dried, drying temperature is 170-180 DEG C, drying time>40min is sequentially completed the step 1-
After step 4, you can obtain the finished product of the electrophoretic coating aluminium section bar.
2. production technology as claimed in claim 1, it is characterised in that the detergent concentration used in the degreasing is 15-
30g/L, the cleaning agent fluoro-containing concentration is 0.6-1.2g/L.
3. production technology as claimed in claim 1, it is characterised in that the alkaline solution used in the alkaline etching includes hydroxide
Sodium, the concentration of the sodium hydroxide is 35-45g/L.
4. production technology as claimed in claim 1, it is characterised in that the acid solution used in the neutralization includes sulfuric acid,
The concentration of the sulfuric acid is 100-120g/L.
5. production technology as claimed in claim 1, it is characterised in that the electrolyte used in the anodic oxidation includes concentration
For 145-165g/L sulfuric acid and content ＜ 30g/L aluminium ion.
6. production technology as claimed in claim 1, it is characterised in that the cleaning treatment is washed using hot pure water.
7. production technology as claimed in claim 1, it is characterised in that in step 2, the electrical conductivity that the electrophoresis is used is 500-
900 μ s, electrophoresis temperature is 18-22 DEG C, and electrophoretic voltage is 120-130V.
8. production technology as claimed in claim 1, it is characterised in that in step 3, the solid content of first rinsing bowl<
1.0%, the electrical conductivity of first rinsing bowl<250μs；The solid content of second rinsing bowl<0.3%, second washing
The electrical conductivity of groove<150μs.
9. the production technology as described in right wants 1, it is characterised in that after being washed through step 3, dry the water mark of aluminium shape surface,
Flash-off time ＞ 20min.
10. production technology as claimed in claim 1, it is characterised in that the aluminium section bar comprising silicon, copper, magnesium, zinc, titanium, chromium,
Iron and aluminium；Wherein, the content of the silicon is 0.3%-0.5%, content≤0.08% of the copper, and the content of the magnesium is
0.45-0.8%, content≤0.05% of the zinc, content≤0.05% of the titanium, content≤0.05% of the chromium, institute
State content≤0.35% of iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710280612.4A CN107119306A (en) | 2017-04-26 | 2017-04-26 | A kind of production technology of electrophoretic coating aluminium section bar |
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| CN201710280612.4A CN107119306A (en) | 2017-04-26 | 2017-04-26 | A kind of production technology of electrophoretic coating aluminium section bar |
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| CN201710280612.4A Pending CN107119306A (en) | 2017-04-26 | 2017-04-26 | A kind of production technology of electrophoretic coating aluminium section bar |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107687016A (en) * | 2017-09-02 | 2018-02-13 | 湖南金牛铝业有限公司 | A kind of aluminium alloy extrusions electrophoretic surface handling process |
| CN113462933A (en) * | 2020-03-30 | 2021-10-01 | 中亿丰罗普斯金铝业股份有限公司 | Production method of extinction amber-copper aluminum profile and extinction amber-copper aluminum profile prepared by same |
| CN113529153A (en) * | 2021-07-29 | 2021-10-22 | 江阴南方新能源科技有限公司 | High-brightness corrosion-resistant electrophoresis process for photovoltaic aluminum profile |
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| CN113529153A (en) * | 2021-07-29 | 2021-10-22 | 江阴南方新能源科技有限公司 | High-brightness corrosion-resistant electrophoresis process for photovoltaic aluminum profile |
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Application publication date: 20170901 |