CN103243372B - A kind of electrodeposited paint film method - Google Patents
A kind of electrodeposited paint film method Download PDFInfo
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- CN103243372B CN103243372B CN201310144237.2A CN201310144237A CN103243372B CN 103243372 B CN103243372 B CN 103243372B CN 201310144237 A CN201310144237 A CN 201310144237A CN 103243372 B CN103243372 B CN 103243372B
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Abstract
The invention discloses a kind of electrodeposited paint film method, it comprises the following steps: (1) anodic oxidation: metal carries out anodic oxidation and makes metal surface form oxide-film；(2) scald: the metal after anodic oxidation immerses hot water storgae scalds 5～6 minutes, contains pure water in described hot water storgae, and water temperature is 50 DEG C～75 DEG C；(3) washing: the metal after scalding immerses an accumulator tank washing and soaks 1～2 minute, contains pure water in this accumulator tank, and pH value is less than 7.5；(4) electrophoresis: the metal after washing immerses electrophoresis tank and carries out electrophoresis, and in electrophoresis tank, pH value is 7.5～8；(5) clean: the metal after electrophoresis is again dipped into accumulator tank and cleans.By using technique scheme, one electrodeposited paint film method of the present invention, have changed process sequence, the section bar after scalding first cleans electrophoresis again, solves watermark problem.
Description
Technical field
The present invention relates to a kind of electrodeposited paint film method.
Background technology
When aluminium shape surface is painted, electrodeposited paint film is conventional process means, it has the advantage that coating is plentiful, uniform, smooth, smooth, and the hardness of electrodeposited paint film, adhesive force, corrosion resistant, impact property, permeance property are substantially better than other coating process, electrodeposited paint film uses water soluble paint, with water for dissolving medium, save a large amount of organic solvent, greatly reduce atmospheric pollution and environmental hazard, safety and sanitation, avoid the hidden danger of fire simultaneously, and coating efficiency are high, paint loss is little, and the utilization rate of coating is up to 90%～95%.Electrophoresis step of the prior art is: anodic oxidation, enters hot water storgae and scalds, and enters electrophoresis tank electrophoresis, enters RO1 groove (the first accumulator tank) and cleans, and enters RO2 groove (the second accumulator tank) and cleans.
Residual acid can be left in metal surface in the nib of the oxide-film formed after anodic oxidation, the purpose that hot water is scalded is, makes fenestra expand by high temperature, forces out outside fenestra by the acid in fenestra, enter electrophoresis tank simultaneously and can reduce the pollution to tank liquor, be not likely to produce glue solidification.But, temperature height causes section bar fast heating, section bar is after hot water storgae hangs out, the oxidation fenestra of expanded by heating runs into cold air and can reduce at once, fenestra fenestra tail end while rapid desufflation can suck some pure water on oxide-film surface by band, often occurring that the place that the position of watermark firstly appears out from the water surface at tail end is in the majority, bottom or side present the most dry water mark.After pure water in hot water storgae uses a period of time, can be in acidity owing to having incorporated residual acid, if if its pH value is less than 5, the section bar after scalding directly enters major trough electrophoresis and arises that watermark problem.Its reason is: in electrophoresis tank, tank liquor is alkalescence, after section bar is directly entered electrophoresis tank after scalding, owing to pH-value difference is bigger, inter-compatibility between water and paint is deteriorated, paint concentration height tank liquor thickness in electrophoresis tank, watermark is covered inside, causes watermark to eliminate by electrophoretic paint.
Summary of the invention
For overcoming disadvantages mentioned above, present invention aim at providing a kind of electrodeposited paint film method.
In order to reach object above, the technical solution used in the present invention is: a kind of electrodeposited paint film method, and it comprises the following steps:
(1) anodic oxidation: metal is carried out anodic oxidation and makes metal surface form oxide-film；
(2) scald: the metal after anodic oxidation immerses hot water storgae scalds 5～6 minutes, contains pure water in described hot water storgae, and water temperature is 50 DEG C～75 DEG C；
(3) washing: the metal after scalding immerses an accumulator tank washing and soaks 1～2 minute, contains pure water in this accumulator tank, and pH value is less than 7.5；
(4) electrophoresis: the metal after washing immerses electrophoresis tank and carries out electrophoresis, and in electrophoresis tank, pH value is 7.5～8；
(5) clean: the metal after electrophoresis is again dipped into accumulator tank and cleans.
Further, accumulator tank has multiple, and in cleaning step, the metal after electrophoresis immerses described multiple accumulator tanks successively and is carried out.
Further, in multiple accumulator tanks during the accumulator tank in water-washing step is cleaning step.
By using technique scheme, one electrodeposited paint film method of the present invention, have changed process sequence, the section bar after scalding first cleans electrophoresis again, solves watermark problem.Due to the section bar after accumulator tank electrophoresis to be cleaned, so after use after a while, pure water in accumulator tank can be mixed into certain paint, and in alkalescence, the section bar after scalding arrives first accumulator tank washing, watermark vestige before is water-washed away by the paint levels mental retardation of accumulator tank, section bar pH value after washing raises simultaneously, entering electrophoresis tank groove electrophoresis again, water improves with the compatibility of paint, more reduces the pollution to tank liquor.
Detailed description of the invention
Below presently preferred embodiments of the present invention is described in detail, so that advantages and features of the invention can be easier to be readily appreciated by one skilled in the art, thus protection scope of the present invention is made apparent clear and definite defining.
A kind of electrodeposited paint film method in the present embodiment, it comprises the following steps:
(1) anodic oxidation: metal is carried out anodic oxidation and makes metal surface form oxide-film；
(2) scald: the metal after anodic oxidation immerses hot water storgae scalds, and contains pure water in hot water storgae, and water temperature is 50 DEG C～75 DEG C；
(3) washing: the metal after scalding immerses an accumulator tank washing and soaks 1～2 minute, contains pure water in this accumulator tank, and pH value is less than 7.5；
(4) electrophoresis: the metal after washing immerses electrophoresis tank and carries out electrophoresis, and in electrophoresis tank, pH value is 7.5～8；
(5) clean: the metal after electrophoresis is again dipped into accumulator tank and cleans.
Accumulator tank in the present embodiment is provided with two, the i.e. first accumulator tank and the second accumulator tank, and in cleaning step, the metal after electrophoresis immerses the first accumulator tank successively and the second accumulator tank is carried out.Owing to the section bar after scalding arrives first the first accumulator tank washing, then to the second accumulator tank washing, so the paint levels of the second accumulator tank to be less than the first accumulator tank.Generally, employing the first accumulator tank in water-washing step is washed, if the concentration of the first accumulator tank is higher, can change into the second accumulator tank and wash.
Embodiment of above is only for technology design and the feature of the explanation present invention; its object is to allow person skilled in the art understand present disclosure and to be carried out; can not limit the scope of the invention with this; all equivalence changes done according to spirit of the invention or modification, all should contain within the scope of the present invention.
Claims (1)
1. an electrodeposited paint film method, it comprises the following steps:
(1) anodic oxidation: metal is carried out anodic oxidation and makes metal surface form oxide-film；
(2) scald: the metal after anodic oxidation immerses hot water storgae scalds, and contains pure water in described hot water storgae, and water temperature is 50 DEG C～75 DEG C；
(3) washing: the metal after scalding immerses an accumulator tank washing and soaks 1～2 minute, contains pure water in this accumulator tank, and pH value is less than 7.5；
(4) electrophoresis: the metal after washing immerses electrophoresis tank and carries out electrophoresis, and in electrophoresis tank, pH value is 7.5～8；
(5) clean: the metal after electrophoresis is again dipped into accumulator tank and cleans, and after use after a while, the pure water in accumulator tank can be mixed into certain paint, and in alkalescence；
Described accumulator tank includes the first accumulator tank and the second accumulator tank, in cleaning step, metal after electrophoresis immerses the first accumulator tank successively and the second accumulator tank is carried out, after use after a while, the paint levels of the second accumulator tank to be less than the first accumulator tank, and in water-washing step, the first accumulator tank described in employing is washed, when the concentration of the first accumulator tank is bigger, the second accumulator tank described in employing is washed.
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| CN201310144237.2A CN103243372B (en) | 2013-04-24 | 2013-04-24 | A kind of electrodeposited paint film method |
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| CN201310144237.2A CN103243372B (en) | 2013-04-24 | 2013-04-24 | A kind of electrodeposited paint film method |
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| CN103243372A CN103243372A (en) | 2013-08-14 |
| CN103243372B true CN103243372B (en) | 2016-08-03 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103540988A (en) * | 2013-10-31 | 2014-01-29 | 江苏三科安全科技有限公司 | Manufacture process of barrier explosion-proof aluminum alloy |
| CN103820835B (en) * | 2013-11-12 | 2017-04-19 | 浙江卓逸铝业有限公司 | Color electrophoretic coating process of aluminum alloy sections |
| CN106011976B (en) * | 2016-07-06 | 2018-01-05 | 安徽红桥金属制造有限公司 | A kind of high precision spring surface handling process |
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| CN1251396A (en) * | 1999-10-29 | 2000-04-26 | 南海市绍祥铜铝合金型材厂 | Electrophoretic titanium-golden yellow alluminium alloy section material processing method |
| JP2000336498A (en) * | 1999-05-28 | 2000-12-05 | Nippon Light Metal Co Ltd | Surface treatment of aluminum or aluminum alloy |
| CN1341781A (en) * | 2000-09-05 | 2002-03-27 | 张振华 | Aluminium section material body and its production method |
| CN101423967A (en) * | 2007-10-31 | 2009-05-06 | 比亚迪股份有限公司 | Surface treating method of aluminum alloy material |
| CN101492782A (en) * | 2008-04-02 | 2009-07-29 | 何旭坤 | Novel aluminum alloy and heat tinting process for the aluminum alloy product |
| CN102154674A (en) * | 2011-05-06 | 2011-08-17 | 广西南南铝加工有限公司 | Method for anodizing aluminum pendants |
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2013
- 2013-04-24 CN CN201310144237.2A patent/CN103243372B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000336498A (en) * | 1999-05-28 | 2000-12-05 | Nippon Light Metal Co Ltd | Surface treatment of aluminum or aluminum alloy |
| CN1251396A (en) * | 1999-10-29 | 2000-04-26 | 南海市绍祥铜铝合金型材厂 | Electrophoretic titanium-golden yellow alluminium alloy section material processing method |
| CN1341781A (en) * | 2000-09-05 | 2002-03-27 | 张振华 | Aluminium section material body and its production method |
| CN101423967A (en) * | 2007-10-31 | 2009-05-06 | 比亚迪股份有限公司 | Surface treating method of aluminum alloy material |
| CN101492782A (en) * | 2008-04-02 | 2009-07-29 | 何旭坤 | Novel aluminum alloy and heat tinting process for the aluminum alloy product |
| CN102154674A (en) * | 2011-05-06 | 2011-08-17 | 广西南南铝加工有限公司 | Method for anodizing aluminum pendants |
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