CN107190225A - A kind of powder coating process of aluminium section bar - Google Patents
A kind of powder coating process of aluminium section bar Download PDFInfo
- Publication number
- CN107190225A CN107190225A CN201710278757.0A CN201710278757A CN107190225A CN 107190225 A CN107190225 A CN 107190225A CN 201710278757 A CN201710278757 A CN 201710278757A CN 107190225 A CN107190225 A CN 107190225A
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- Prior art keywords
- section bar
- aluminium section
- powder coating
- aluminium
- coating process
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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
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/48—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
- C23C22/56—Treatment of aluminium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/131—Wire arc spraying
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The present invention provides a kind of powder coating process of aluminium section bar, and it comprises the following steps：1) surface cleaning：1 washing, 2 pickling, 2 washings and pure water washing operations are carried out to aluminium section bar successively, wherein, the washing uses fountain；2) chromium-free deactivation：Chromium-free deactivation processing is carried out to aluminium section bar after cleaning, one layer of environmental-protecting chemical conversion film is generated in aluminium shape surface；3) dry：Aluminium section bar after Passivation Treatment is dried, the moisture content of Surface of profile is removed；4) dust：Processing of dusting is carried out to the section bar of drying, the aluminium section bar with powder coating is obtained；5) solidify：Curing process is carried out to aluminium section bar obtained above, makes to be adsorbed in the powder particle melting of workpiece surface, levelling and end reaction is complete.The present invention, merely with surface cleaning, chromium-free deactivation, is dried, dusts, the simple step such as solidify by controlling specific technological parameter, you can realize aluminium shape surface formed stably, uniform protective coating.
Description
Technical field
The present invention relates to the technical field of surface of section bar, more particularly to a kind of powder coating process of aluminium section bar.
Background technology
Section bar has been obtained extensively because its advantage in terms of intensity and processing in building structure and manufacture installing area
Application.Especially aluminium section bar, because light weight, intensity are high, excellent corrosion resistance, electrical property and reprocessing and treatability
Can, it is widely used in fields such as Aero-Space, ship vehicle, building decorations.Generally in section bar preparation technology, section bar into
After type, generally also need to carry out powder coating process to section bar, in Surface of profile formation protective coating, significantly improve the resistance to of section bar
The performance such as water, wear-resisting, anti-corrosion.
At present, the process of surface treatment of aluminium section bar is realized more than in the market by the way of cathode electrophoretic coating, however, due to electrophoresis
In spraying coating process, the founding shrinkage cavity of the high transparency generation of electrophoretic paint, black, black line, the coarse-grain, heat-tinting work of lime-ash generation
The problems such as design of scattered small flowers and plants that skill is caused, speckle, washmarking, dust burr, dross and male and female face and high porosity that environmental condition is caused, sternly
Ghost image rings the yield rate of aluminium section bar.
The content of the invention
To solve the above problems, the present invention proposes a kind of powder coating process of aluminium section bar, by controlling specific technique
Parameter, merely with surface cleaning, chromium-free deactivation, dries, dusts, the simple step such as solidifies, you can realize in aluminium shape surface
Form stable, uniform protective coating.
Specifically, the present invention provides a kind of powder coating process of aluminium section bar, and it comprises the following steps：1) surface cleaning：
1 washing, 2 pickling, 2 washings and pure water washing operations are carried out to aluminium section bar successively, wherein, the washing uses fountain；
2) chromium-free deactivation：Chromium-free deactivation processing is carried out to aluminium section bar after cleaning, one layer of environmental-protecting chemical conversion is generated in aluminium shape surface
Film；3) dry：Aluminium section bar after Passivation Treatment is dried, the moisture content of Surface of profile is removed；4) dust：To the section bar of drying
Progress is dusted processing, obtains the aluminium section bar with powder coating；5) solidify：Curing process is carried out to aluminium section bar obtained above,
Melt the powder particle for being adsorbed in workpiece surface, simultaneously end reaction is complete for levelling.
Preferably, step 1) in solution used in pickling processes the concentration of free acid be 8-18ml/g, aluminium ion concentration≤
5.5g/L, solution temperature is 20-40 DEG C.
Preferably, step 1) described in pure water wash used in water the μ s/cm of electrical conductivity≤100, pure water bath temperature degree is 20-
40℃。
Preferably, step 2) in content ＜ 5ml/g, pH value 3.0-3.6, zirconium content 0.06- sour in solution used
0.18g/L, aluminium ion concentration≤400g/L, 10-45 DEG C of tank liquor temperature.
Preferably, step 3) in 85-120 DEG C of drying temperature.
Preferably, step 4) described in the process conditions dusted be：Voltage 60-80Kv, electric current 20-25uA, linear speed 2.0-
2.3m/min, powder amount 20%-100%, air pressure 4.5-5.5bar, powder rifle and section bar apart from 160cm.
Preferably, step 5) in 200 ± 10 DEG C of solidification temperature, more than soaking time 10min.
Compared with prior art, the technical advantages of the present invention are that：
1) powder coating process of aluminium section bar provided by the present invention is simple to operate, few to the requirement such as equipment, merely with table
Face cleaning, chromium-free deactivation, the simple step such as dry, dust, solidifying；
2) using the powder coating process of acquisition of the invention, stabilization, uniform protection can be formed in aluminium shape surface and is applied
Layer, effectively improves the performances such as the water-fast, wear-resisting of section bar, anti-corrosion.
Brief description of the drawings
Fig. 1 is the flow chart of the powder coating process for the aluminium section bar for meeting a preferred embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment, the technical advantage of the present invention is elaborated.
Refering to Fig. 1 as can be seen that the present invention provides the powder coating process of kind of aluminium section bar, it comprises the following steps：1) table
Clean in face：1 washing, 2 pickling, 2 washings and pure water washing operations are carried out to aluminium section bar successively, wherein, the washing is used
Fountain；2) chromium-free deactivation：Chromium-free deactivation processing is carried out to aluminium section bar after cleaning, one layer of environment-friendly type is generated in aluminium shape surface
Learn conversion film；3) dry：Aluminium section bar after Passivation Treatment is dried, the moisture content of Surface of profile is removed；4) dust：To drying
Section bar dust processing, obtain the aluminium section bar with powder coating；5) solidify：Aluminium section bar obtained above is solidified
Processing, makes to be adsorbed in the powder particle melting of workpiece surface, levelling and end reaction is complete.Spraying coating process by the present invention can
Stabilization, uniform protective coating are formed in aluminium shape surface, the performances such as the water-fast, wear-resisting of section bar, anti-corrosion are effectively improved.It is specific real
Under applying for example：
Embodiment 1
First, washed using fountain, the sawing aluminium skimmings of surface attachment and the dust of attachment etc. are removed, to save pre- degreasing
Medicine, mitigation tank liquor pollution；Entered two step pickling, and further eliminated surface and oil contaminant and natural oxide film, be next step Chrome-free into
Film provides cleaning, the good aluminum substrate of oxygen-free films completely, wherein in Acidwash solution, free acid concentration 8ml/g, aluminium ion concentration
5.5g/L, 40 DEG C of tank liquor temperature；Two step washings are carried out again, are then carried out pure water and are washed, clean the degreasing tank liquor of Surface of profile, wherein
Pure water washes the μ s/cm of electrical conductivity 100,20 DEG C of pure water bath temperature degree；Chromium-free deactivation is carried out to the section bar after cleaning, in Surface of profile generation
One layer of environmental-protecting chemical conversion film, with improve with the adhesion of paint film, wherein total acid 4mls, pH value 3.0, zirconium content 0.18g/L,
Aluminium ion concentration 400g/L, 45 DEG C of tank liquor temperature.Then, the moisture content of Surface of profile, 85 DEG C of drying temperature are dried；To drying section bar
Progress dusting operation, process control needs voltage 60Kv, electric current 25uA, linear speed 2.3m/min, powder amount 100%, air pressure 4.5bar,
Powder rifle and section bar apart from 160cm；Finally solidified, make to be adsorbed in the powder particle melting of workpiece surface, levelling and final
React the process being fully cured, wherein 210 DEG C of solidification temperature, more than soaking time 10min.
Embodiment 2
First, washed using fountain, the sawing aluminium skimmings of surface attachment and the dust of attachment etc. are removed, to save pre- degreasing
Medicine, mitigation tank liquor pollution；Entered two step pickling, and further eliminated surface and oil contaminant and natural oxide film, be next step Chrome-free into
Film provides cleaning, the good aluminum substrate of oxygen-free films, wherein free acid 18ml/g, aluminium ion concentration 4.5g/L, tank liquor temperature completely
20℃；Two step washings are carried out again, are then carried out pure water and are washed, clean the degreasing tank liquor of Surface of profile, wherein pure water washes the μ of electrical conductivity 80
S/cm, 40 DEG C of pure water bath temperature degree；Chromium-free deactivation is carried out to the section bar after cleaning, generating one layer of environmental-protecting chemical in Surface of profile turns
Change film, to improve the adhesion with paint film, wherein total acid 1mls, pH value 3.6, zirconium content 0.06g/L, aluminium ion concentration 300g/
L, 10 DEG C of tank liquor temperature；Then, the moisture content of Surface of profile, 120 DEG C of drying temperature are dried；Dusting operation is carried out to drying section bar,
Process control needs voltage 80Kv, electric current 20uA, linear speed 2.0m/min, powder amount 20%%, air pressure 5.5bar, powder rifle and section bar
Apart from 160cm；Finally solidified, the powder particle melting, levelling and the end reaction that are adsorbed in workpiece surface is fully cured
Process；Wherein 190 DEG C of solidification temperature, more than soaking time 10min.
In summary, the powder coating process of aluminium section bar provided by the present invention is simple to operate, few to the requirement such as equipment, only
Using surface cleaning, chromium-free deactivation, dry, dust, the simple step such as solidify；Utilize the powder spray work of the acquisition of the present invention
Skill, can form stabilization, uniform protective coating in aluminium shape surface, effectively improve the performances such as the water-fast, wear-resisting of section bar, anti-corrosion.
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 (7)
1. a kind of powder coating process of aluminium section bar, it is characterised in that comprise the following steps：
1) surface cleaning：1 washing, 2 pickling, 2 washings and pure water washing operations are carried out to aluminium section bar successively, wherein, it is described
Washing uses fountain；
2) chromium-free deactivation：To step 1) cleaning after aluminium section bar carry out chromium-free deactivation processing, aluminium shape surface generate one layer of environmental protection
Type chemical composition coating；
3) dry：To step 2) processing after aluminium section bar dry, removal Surface of profile moisture content；
4) dust：To step 3) section bar of drying dust processing, obtains the aluminium section bar with powder coating；
5) solidify：To step 4) obtained aluminium section bar carries out curing process, makes to be adsorbed in the powder particle melting of workpiece surface, stream
Flat and end reaction is complete.
2. powder coating process as claimed in claim 1, it is characterised in that step 1) in dissociate in solution used in pickling processes
The concentration of acid is 8-18ml/g, and aluminium ion concentration≤5.5g/L, solution temperature is 20-40 DEG C.
3. powder coating process as claimed in claim 1, it is characterised in that step 1) described in pure water wash used in water
The μ s/cm of electrical conductivity≤100, pure water bath temperature degree is 20-40 DEG C.
4. powder coating process as claimed in claim 1, it is characterised in that step 2) in, sour content ＜ in solution used
5ml/g, pH value 3.0-3.6, zirconium content 0.06-0.18g/L, aluminium ion concentration≤400g/L, 10-45 DEG C of tank liquor temperature.
5. powder coating process as claimed in claim 1, it is characterised in that step 3) in 85-120 DEG C of drying temperature.
6. powder coating process as claimed in claim 1, it is characterised in that step 4) described in the process conditions dusted be：
Voltage 60-80Kv, electric current 20-25uA, linear speed 2.0-2.3m/min, powder amount 20%-100%, air pressure 4.5-5.5bar, powder rifle with
Section bar apart from 160cm.
7. powder coating process as claimed in claim 1, it is characterised in that step 5) in 200 ± 10 DEG C of solidification temperature, protect
Warm more than time 10min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710278757.0A CN107190225A (en) | 2017-04-25 | 2017-04-25 | A kind of powder coating process of aluminium section bar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710278757.0A CN107190225A (en) | 2017-04-25 | 2017-04-25 | A kind of powder coating process of aluminium section bar |
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| CN107190225A true CN107190225A (en) | 2017-09-22 |
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| CN201710278757.0A Pending CN107190225A (en) | 2017-04-25 | 2017-04-25 | A kind of powder coating process of aluminium section bar |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109137049A (en) * | 2018-09-06 | 2019-01-04 | 广东耀银山铝业有限公司 | A kind of easy pole electrophoretic aluminium section production technology being passivated pre-treatment |
| CN109234717A (en) * | 2018-09-10 | 2019-01-18 | 浙江五源科技股份有限公司 | The preparation method of preceding chromium-free environment-friendly conversion film is moulded in a kind of coating steel pipe leaching |
| CN109898043A (en) * | 2017-12-11 | 2019-06-18 | 广西西铝铝业有限公司 | A kind of aluminum profile processing technology |
| CN113231289A (en) * | 2021-05-12 | 2021-08-10 | 浦江三思光电技术有限公司 | Plastic spraying method and system for lamp structural member |
| CN115350882A (en) * | 2022-09-09 | 2022-11-18 | 大冶市正明铝业有限责任公司 | Preparation method of powder spraying heat insulation aluminum profile with carved patterns on surface |
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| CN101602042A (en) * | 2009-07-10 | 2009-12-16 | 广州市金钟汽车零件制造有限公司 | A kind of automatic powder spraying line for automobile wheel hub finishing components and technology thereof |
| CN103343346A (en) * | 2013-07-10 | 2013-10-09 | 江苏东方龙机车集团有限公司 | Technology for improvising corrosion resistance on surface of aluminum or aluminum alloy |
| CN105239069A (en) * | 2015-10-29 | 2016-01-13 | 桂林华森电力科技有限公司 | Automobile hub surface treatment process |
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2017
- 2017-04-25 CN CN201710278757.0A patent/CN107190225A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101602042A (en) * | 2009-07-10 | 2009-12-16 | 广州市金钟汽车零件制造有限公司 | A kind of automatic powder spraying line for automobile wheel hub finishing components and technology thereof |
| CN103343346A (en) * | 2013-07-10 | 2013-10-09 | 江苏东方龙机车集团有限公司 | Technology for improvising corrosion resistance on surface of aluminum or aluminum alloy |
| CN105239069A (en) * | 2015-10-29 | 2016-01-13 | 桂林华森电力科技有限公司 | Automobile hub surface treatment process |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109898043A (en) * | 2017-12-11 | 2019-06-18 | 广西西铝铝业有限公司 | A kind of aluminum profile processing technology |
| CN109137049A (en) * | 2018-09-06 | 2019-01-04 | 广东耀银山铝业有限公司 | A kind of easy pole electrophoretic aluminium section production technology being passivated pre-treatment |
| CN109234717A (en) * | 2018-09-10 | 2019-01-18 | 浙江五源科技股份有限公司 | The preparation method of preceding chromium-free environment-friendly conversion film is moulded in a kind of coating steel pipe leaching |
| CN113231289A (en) * | 2021-05-12 | 2021-08-10 | 浦江三思光电技术有限公司 | Plastic spraying method and system for lamp structural member |
| CN115350882A (en) * | 2022-09-09 | 2022-11-18 | 大冶市正明铝业有限责任公司 | Preparation method of powder spraying heat insulation aluminum profile with carved patterns on surface |
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Application publication date: 20170922 |
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