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CN103820835A - Color electrophoretic coating process of aluminum alloy sections - Google Patents

Color electrophoretic coating process of aluminum alloy sections Download PDF

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Publication number
CN103820835A
CN103820835A CN201310559122.XA CN201310559122A CN103820835A CN 103820835 A CN103820835 A CN 103820835A CN 201310559122 A CN201310559122 A CN 201310559122A CN 103820835 A CN103820835 A CN 103820835A
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Prior art keywords
washing
section bar
electrophoresis
alkaline etching
oxidation
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CN201310559122.XA
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CN103820835B (en
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沈建山
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Zhejiang Zhuoyi Aluminum Co ltd
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ZHEJIANG ZHUOYI ALUMINUM Co Ltd
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Abstract

The invention relates to a color electrophoretic coating process of aluminum alloy sections. The process mainly comprises the steps of blank preparation, arrangement, degreasing, water washing, alkali corrosion, water washing, neutralization, water washing, oxidation, water washing, electrophoresis, draining and solidification. Compared with the traditional process of electrophoretic coating after electrolytic coloring and hole sealing, the color electrophoretic coating process reduces the electrolytic coloring, the hole sealing and twice water washing procedures, so that no heavy metal ions or nickel ions are emitted, the water consumption is largely decreased, and the purposes of energy conservation and environmental protection are preferably realized.

Description

A kind of color electrophoresis enamelling process of aluminium alloy extrusions
 
Technical field
The present invention relates to a kind of new enamelling process of section bar, especially relate to a kind of color electrophoresis enamelling process of aluminium alloy extrusions.
Background technology
The traditional process of surface treatment of aluminium section bar is oxidation, painted and sealing treatment, the conversion film of this aluminium is out of doors when life-time service, particularly in acid rain or ocean environment time, easily corrosion, poor durability, therefore from the seventies, people attempt improving by the method for paint spraying decorate properties and the working life of aluminium section for buildings, at present, industrialization successfully use have electrophoretic painting, a powder coating and fluorocarbon-sprayed.Because electrophoretic paint is water-borne coatings, aluminium direct electrophoresis after pre-treatment washing, cataphoretic coating transparency is high, has not only had high-decoration but also can give prominence to the metalluster of aluminium section bar itself, therefore on architectural aluminum section, uses more and more electrophoretic painting.Existing electrophoretic painting technique, normally by carrying out again electrophoretic painting after electrolytic coloring sealing of hole, complex procedures, energy consumption is large, and in production process, has the discharge of plurality of heavy metal ion and nickel ion, affects environment.
Summary of the invention
The object of this invention is to provide the color electrophoresis enamelling process that a kind of aluminium alloy extrusions is new.
What the present invention solved is the complex procedures existing in existing aluminium alloy section surface electrophoretic painting technique, and environmental pollution is large, and paint film appearance color is stable not, and solidity to corrosion is not good, the defect that hardness is not high enough.
Technical scheme of the present invention is: a kind of color electrophoresis enamelling process of aluminium alloy extrusions, it is characterized in that described technique mainly comprises that blank prepares and prick row, degreasing, washing, alkaline etching, washing, neutralization, washing, oxidation, washing, electrophoresis, the step such as drain, solidify, concrete steps are as follows:
(1) blank is prepared and the row of bundle
The aluminum steel of new aluminum steel or second stage employ is put in alkali groove, after alkaline etching, two-stage washing, after after neutralization, two-stage is washed, is dried again, the row of bundle;
(2) degreasing
Section bar after the row of bundle is put into degreasing tank with obliquitys more than 25 degree, and keeping section bar time in degreasing tank is 2~4 minutes, and after proposing, control liquid 30 seconds, then carries out two-stage washing; Described skimming temp is room temperature; Described degreasing fluid is the sulphuric acid soln of 160 ± 10g/L;
(3) washing
Section bar after degreasing is hung in mobile Rinsing Area and taken out of after cleaning;
(4) alkaline etching
Section bar after washing is put into alkaline etching groove with obliquitys more than 25 degree, and keeping the time of section bar in alkaline etching groove is 1~4 minute, and after proposing, control liquid 10 seconds, then carries out two-stage washing; Described alkaline etching temperature is 42.5 ± 2.5 ℃; Described alkaline etching liquid comprises 45 ± 5g/L NaOH, AL 3+≤ 40g/L and the agent of 20 ± 5g/L alkaline etching;
(5) washing
Section bar after alkaline etching is hung in mobile Rinsing Area and taken out of after cleaning;
(6) neutralization
Section bar after washing is put into neutralizing well with obliquitys more than 25 degree, and keeping the time of section bar in neutralizing well is 2~4 minutes, and after proposing, control liquid 30 seconds, then carries out two-stage washing; Described neutral temperature is room temperature; Described neutralizer is the sulphuric acid soln of 160 ± 10g/L;
(7) washing
Section bar after neutralization is hung in mobile Rinsing Area and taken out of after cleaning;
(8) oxidation
Section bar after washing is put into oxidation trough with obliquitys more than 25 degree, when section bar enters oxidation trough, can divide 2~3 landing, avoid forming oxidation bubble; The thickness of controlling oxide film is 8-10 μ m, electric current=total area × current density; Described current density=1.1~1.3KA/dm 2, coefficient=0.38; Described oxidizing temperature is 19 ± 1 ℃; Described oxidation voltage is 12~17V; Described oxidation solution comprises 160 ± 5g/L H 2sO 4and AL 3+≤ 12g/L; After section bar proposes, control liquid 30 seconds, then carries out two-stage washing;
(9) washing
Section bar after oxidation is hung in mobile Rinsing Area and taken out of after cleaning;
(10) electrophoresis ED
Section bar after washing is slowly put into electrolyzer, have electrocoating paint in electrolyzer, section bar submergence started electrophoresis after 60 seconds, and electrophoresis time is 110~140 seconds, then proposed control liquid 30 seconds; Described electrophoretic voltage is 145V; Described electrophoresis temperature is 23 ± 1 ℃;
(11) through RO 1, RO 2after washing, drain
(12) solidify
Be cured putting into curing oven after the section bar washing after draining, drip-dry, need exhaust 15 minutes while closing fire door, guarantee that combustion gas air pressure is 0.4~0.6 Mpa in solidification process, solidification value is 190 ℃, and be 25~35 minutes set time; After coming out of the stove, can carry out lower package dress, obtain product.
Preferably, consisting of of the electrocoating paint in described electrophoresis operation: methacrylic ester 20%, containing carboxylic CALCIUM ACRYLATE 20%, Acrylic Acid Monomer 20%, water nano mill base 5%, solvent 30%, pure water 5%.
The invention has the beneficial effects as follows: color electrophoresis enamelling process provided by the invention, compared with carrying out again the traditional technology of electrophoretic painting after common electrolytic coloring sealing of hole, electrolytic coloring, sealing of hole and twice washing step are reduced, reach the discharge of heavy metal free ion and nickel ion, greatly reduce the consumption of water, well realized the targets such as energy-saving and environmental protection.
Accompanying drawing explanation
Fig. 1 is the electrophoretic painting process flow sheet of aluminium alloy extrusions.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in Figure 1, a kind of color electrophoresis enamelling process of aluminium alloy extrusions, described technique mainly comprises that blank prepares and prick row, degreasing, acid etching, alkaline etching, neutralization, oxidation, electrolytic coloring, washing, electrophoresis, the step such as solidifies, concrete steps are as follows:
(1) blank is prepared and the row of bundle
The aluminum steel of new aluminum steel or second stage employ is put in alkali groove, after alkaline etching, two-stage washing, after after neutralization, two-stage is washed, is dried again, the row of bundle;
(2) degreasing
Section bar after the row of bundle is put into degreasing tank with obliquitys more than 25 degree, and keeping section bar time in degreasing tank is 2~4 minutes, and after proposing, control liquid 30 seconds, then carries out two-stage washing; Described skimming temp is room temperature; Described degreasing fluid is the sulphuric acid soln of 160 ± 10g/L;
(3) washing
Section bar after degreasing is hung in the Rinsing Area that flows and taken out of after cleaning;
(4) alkaline etching
Section bar after washing is put into alkaline etching groove with obliquitys more than 25 degree, and keeping the time of section bar in alkaline etching groove is 1~4 minute, and after proposing, control liquid 10 seconds, then carries out two-stage washing; Described alkaline etching temperature is 42.5 ± 2.5 ℃; Described alkaline etching liquid comprises 45 ± 5g/L NaOH, AL 3+≤ 40g/L and the agent of 20 ± 5g/L alkaline etching;
(5) washing
Section bar after alkaline etching is hung in the Rinsing Area that flows and taken out of after cleaning;
(6) neutralization
Section bar after washing is put into neutralizing well with obliquitys more than 25 degree, and keeping the time of section bar in neutralizing well is 2~4 minutes, and after proposing, control liquid 30 seconds, then carries out two-stage washing; Described neutral temperature is room temperature; Described neutralizer is the sulphuric acid soln of 160 ± 10g/L;
(7) washing
Section bar after neutralization is hung in the Rinsing Area that flows and taken out of after cleaning;
(8) oxidation
Section bar after washing is put into oxidation trough with obliquitys more than 25 degree, when section bar enters oxidation trough, can divide 2~3 landing, avoid forming oxidation bubble; The thickness of controlling oxide film is 8-10 μ m, electric current=total area × current density; Described current density=1.1~1.3KA/dm 2, coefficient=0.38; Described oxidizing temperature is 19 ± 1 ℃; Described oxidation voltage is 12~17V; Described oxidation solution comprises 160 ± 5g/L H 2sO 4and AL 3+≤ 12g/L; After section bar proposes, control liquid 30 seconds, then carries out two-stage washing;
(9) washing
Section bar after oxidation is hung in the Rinsing Area that flows and taken out of after cleaning;
(10) electrophoresis ED
Section bar after washing is slowly put into electrolyzer, have electrocoating paint in electrolyzer, section bar submergence started electrophoresis after 60 seconds, and electrophoresis time is 110~140 seconds, then proposed control liquid 30 seconds; Described electrophoretic voltage is 145V; Described electrophoresis temperature is 23 ± 1 ℃;
(11) through RO 1, RO 2after washing, drain
(12) solidify
Be cured putting into curing oven after the section bar washing after electrophoresis, drip-dry, need exhaust 15 minutes while closing fire door, guarantee that combustion gas air pressure is 0.4~0.6 Mpa in solidification process, solidification value is 190 ℃, and be 25~35 minutes set time; After coming out of the stove, can carry out lower package dress, obtain product.
Consisting of of electrocoating paint in described electrophoresis operation: methacrylic ester 20%, containing carboxylic CALCIUM ACRYLATE 20%, Acrylic Acid Monomer 20%, water nano mill base 5%, solvent 30%, pure water 5%.

Claims (2)

1. the color electrophoresis enamelling process of an aluminium alloy extrusions, it is characterized in that described technique mainly comprises that blank prepares and prick row, degreasing, washing, alkaline etching, washing, neutralization, washing, oxidation, washing, electrophoresis, the step such as drain, solidify, concrete steps are as follows:
(1) blank is prepared and the row of bundle
The aluminum steel of new aluminum steel or second stage employ is put in alkali groove, after alkaline etching, two-stage washing, after after neutralization, two-stage is washed, is dried again, the row of bundle;
(2) degreasing
Section bar after the row of bundle is put into degreasing tank with obliquitys more than 25 degree, and keeping section bar time in degreasing tank is 2~4 minutes, and after proposing, control liquid 30 seconds, then carries out two-stage washing; Described skimming temp is room temperature; Described degreasing fluid is the sulphuric acid soln of 160 ± 10g/L;
(3) washing
Section bar after degreasing is hung in mobile Rinsing Area and taken out of after cleaning;
(4) alkaline etching
Section bar after washing is put into alkaline etching groove with obliquitys more than 25 degree, and keeping the time of section bar in alkaline etching groove is 1~4 minute, and after proposing, control liquid 10 seconds, then carries out two-stage washing; Described alkaline etching temperature is 42.5 ± 2.5 ℃; Described alkaline etching liquid comprises 45 ± 5g/L NaOH, AL 3+≤ 40g/L and the agent of 20 ± 5g/L alkaline etching;
(5) washing
Section bar after alkaline etching is hung in mobile Rinsing Area and taken out of after cleaning;
(6) neutralization
Section bar after washing is put into neutralizing well with obliquitys more than 25 degree, and keeping the time of section bar in neutralizing well is 2~4 minutes, and after proposing, control liquid 30 seconds, then carries out two-stage washing; Described neutral temperature is room temperature; Described neutralizer is the sulphuric acid soln of 160 ± 10g/L;
(7) washing
Section bar after neutralization is hung in mobile Rinsing Area and taken out of after cleaning;
(8) oxidation
Section bar after washing is put into oxidation trough with obliquitys more than 25 degree, when section bar enters oxidation trough, can divide 2~3 landing, avoid forming oxidation bubble; The thickness of controlling oxide film is 8-10 μ m, electric current=total area × current density; Described current density=1.1~1.3KA/dm 2, coefficient=0.38; Described oxidizing temperature is 19 ± 1 ℃; Described oxidation voltage is 12~17V; Described oxidation solution comprises 160 ± 5g/L H 2sO 4and AL 3+≤ 12g/L; After section bar proposes, control liquid 30 seconds, then carries out two-stage washing;
(9) washing
Section bar after oxidation is hung in mobile Rinsing Area and taken out of after cleaning;
(10) electrophoresis ED
Section bar after washing is slowly put into electrolyzer, have electrocoating paint in electrolyzer, section bar submergence started electrophoresis after 60 seconds, and electrophoresis time is 110~140 seconds, then proposed control liquid 30 seconds; Described electrophoretic voltage is 145V; Described electrophoresis temperature is 23 ± 1 ℃;
(11) through RO 1, RO 2after washing, drain;
(12) solidify
Be cured putting into curing oven after the section bar washing after draining, drip-dry, need exhaust 15 minutes while closing fire door, guarantee that combustion gas air pressure is 0.4~0.6 Mpa in solidification process, solidification value is 190 ℃, and be 25~35 minutes set time; After coming out of the stove, can carry out lower package dress, obtain product.
2. the color electrophoresis enamelling process of a kind of aluminium alloy extrusions as claimed in claim 1, is characterized in that consisting of of electrocoating paint in described electrophoresis operation: methacrylic ester 20%, containing carboxylic CALCIUM ACRYLATE 20%, Acrylic Acid Monomer 20%, water nano mill base 5%, solvent 30%, pure water 5%.
CN201310559122.XA 2013-11-12 2013-11-12 Color electrophoretic coating process of aluminum alloy sections Active CN103820835B (en)

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Cited By (12)

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Publication number Priority date Publication date Assignee Title
CN104151968A (en) * 2014-08-13 2014-11-19 经阁铝业科技股份有限公司 Colored water-soluble electro-fluorine paint and production process thereof
CN105040074A (en) * 2015-08-04 2015-11-11 安徽科蓝特铝业有限公司 Electrophoresis wood grain aluminum profile and manufacturing process thereof
CN105088318A (en) * 2015-08-31 2015-11-25 天峨县宏昌农机专业合作社 Method for electrophoretic coating of aluminum alloy material
CN105153782A (en) * 2015-07-29 2015-12-16 湖南省霖辉高新材料科技有限公司 Aluminium paste anode electrophoresis tank liquid and aluminium paste anode electrophoresis technology
CN106676610A (en) * 2016-12-29 2017-05-17 安徽科蓝特铝业有限公司 Surface treatment process for aluminium alloy sections
CN107354499A (en) * 2017-08-08 2017-11-17 浙江新祥铝业股份有限公司 A kind of processing method of the coloured electrophoresis section bar of wire drawing
CN107829002A (en) * 2017-11-14 2018-03-23 辽宁忠旺集团有限公司 A kind of production technology of solar energy aluminium alloy photovoltaic bracket
CN108588780A (en) * 2017-12-21 2018-09-28 天津新艾隆科技有限公司 A kind of production method of tertiary colour aluminium section bar and its aluminium section bar of preparation
CN108774745A (en) * 2018-05-30 2018-11-09 广东耀银山铝业有限公司 A kind of easy pole electrophoresis production technology and aluminium section bar obtained
CN108795204A (en) * 2018-05-30 2018-11-13 广东耀银山铝业有限公司 Aluminium section bar made from a kind of aluminium section bar electrophoretic paint, preparation method and electrophoresis
CN109628800A (en) * 2018-12-17 2019-04-16 佛山市凡恩金属制品有限公司 A kind of aluminum profile peculiar to vessel and its production method
CN112746303A (en) * 2020-12-25 2021-05-04 淮北龙图铝材有限公司 Colored extinction electrophoresis painting aluminum alloy building section bar

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104151968A (en) * 2014-08-13 2014-11-19 经阁铝业科技股份有限公司 Colored water-soluble electro-fluorine paint and production process thereof
CN105153782A (en) * 2015-07-29 2015-12-16 湖南省霖辉高新材料科技有限公司 Aluminium paste anode electrophoresis tank liquid and aluminium paste anode electrophoresis technology
CN105040074A (en) * 2015-08-04 2015-11-11 安徽科蓝特铝业有限公司 Electrophoresis wood grain aluminum profile and manufacturing process thereof
CN105088318A (en) * 2015-08-31 2015-11-25 天峨县宏昌农机专业合作社 Method for electrophoretic coating of aluminum alloy material
CN106676610A (en) * 2016-12-29 2017-05-17 安徽科蓝特铝业有限公司 Surface treatment process for aluminium alloy sections
CN107354499A (en) * 2017-08-08 2017-11-17 浙江新祥铝业股份有限公司 A kind of processing method of the coloured electrophoresis section bar of wire drawing
CN107829002B (en) * 2017-11-14 2019-08-20 辽宁忠旺集团有限公司 A kind of production technology of solar energy aluminium alloy photovoltaic bracket
CN107829002A (en) * 2017-11-14 2018-03-23 辽宁忠旺集团有限公司 A kind of production technology of solar energy aluminium alloy photovoltaic bracket
CN108588780A (en) * 2017-12-21 2018-09-28 天津新艾隆科技有限公司 A kind of production method of tertiary colour aluminium section bar and its aluminium section bar of preparation
CN108774745A (en) * 2018-05-30 2018-11-09 广东耀银山铝业有限公司 A kind of easy pole electrophoresis production technology and aluminium section bar obtained
CN108795204A (en) * 2018-05-30 2018-11-13 广东耀银山铝业有限公司 Aluminium section bar made from a kind of aluminium section bar electrophoretic paint, preparation method and electrophoresis
CN108795204B (en) * 2018-05-30 2020-10-09 广东耀银山铝业有限公司 Electrophoretic paint for aluminum profile, preparation method of electrophoretic paint and aluminum profile prepared through electrophoresis
CN109628800A (en) * 2018-12-17 2019-04-16 佛山市凡恩金属制品有限公司 A kind of aluminum profile peculiar to vessel and its production method
CN109628800B (en) * 2018-12-17 2020-12-04 海安市华达铝型材有限公司 Marine aluminum profile and production method thereof
CN112746303A (en) * 2020-12-25 2021-05-04 淮北龙图铝材有限公司 Colored extinction electrophoresis painting aluminum alloy building section bar
CN112746303B (en) * 2020-12-25 2022-02-11 淮北龙图铝材有限公司 Drying device of colored extinction electrophoresis painting aluminum alloy architectural shape

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Address after: No. 2737, Huancheng South Road, wutong Street, Tongxiang City, Jiaxing City, Zhejiang Province 314500

Patentee after: Zhejiang Zhuoyi Aluminum Co.,Ltd.

Address before: No. 2737, Huancheng South Road, wutong Street, Tongxiang City, Jiaxing City, Zhejiang Province 314500

Patentee before: ZHEJIANG ZHUOYI ALUMINUM Co.,Ltd.