CN103243372A - Electrophoresis film-painting method - Google Patents
Electrophoresis film-painting method Download PDFInfo
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- CN103243372A CN103243372A CN2013101442372A CN201310144237A CN103243372A CN 103243372 A CN103243372 A CN 103243372A CN 2013101442372 A CN2013101442372 A CN 2013101442372A CN 201310144237 A CN201310144237 A CN 201310144237A CN 103243372 A CN103243372 A CN 103243372A
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Abstract
The invention discloses an electrophoresis film-painting method. The electrophoresis film-painting method comprises the following steps of: (1) anodic oxidation: carrying out the anodic oxidation on metal to form an oxidation film on the surface of the metal; (2) hot washing: soaking the metal subjected to the anodic oxidation into a hot water tank to be subjected to the hot washing for 5-6 minutes, wherein pure water is contained in the hot water tank, and the water temperature is 50-75 DEG C; (3) water washing: soaking the metal after being subjected to the hot washing into a recovery tank to be subjected to the water washing for 1-2 minutes, wherein the pure water is contained in the recovery tank, and the pH value of the pure water is less than 7.5; (4) electrophoresis: soaking the metal after being subjected to the water washing into an electrophoresis tank to be subjected to the electrophoresis, wherein the pH value in the electrophoresis tank is 7.5-8; and (5) repeatedly soaking the metal after being subjected to the electrophoresis into the recovery tank to be subjected to water washing. By utilizing the technical scheme, according to the electrophoresis film-painting method disclosed by the invention, the process sequence is changed, and a section bar after being subjected to the hot washing is firstly cleaned and is then subjected to the electrophoresis, so that the watermark problem is solved.
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 the process means of using always, it has plentiful, even, smooth, the smooth advantage of coating, and the hardness of electrodeposited paint film, sticking power, corrosion resistant, impact property, penetrating quality obviously are better than other coating process, electrodeposited paint film adopts water soluble paint, be dissolve medium with water, a large amount of organic solvents have been saved, greatly reduce topsoil and environmental hazard, the hidden danger of fire and coating efficiency height have been avoided in safety and sanitation simultaneously, paint loss is little, and the utilization ratio of coating can reach 90%～95%.Electrophoresis step of the prior art is: anodic oxidation, and go into hot water tank and scald, go into the electrophoresis chamber electrophoresis, go into RO1 groove (first accumulator tank) and clean, go into RO2 groove (second accumulator tank) and clean.
In the nib of the formed oxide film in metallic surface, can leave residual acid after the anodic oxidation, the purpose that hot water is scalded is, by high temperature fenestra is expanded, and the acid in the fenestra is forced out outside the fenestra, advance electrophoresis chamber simultaneously and can reduce pollution to tank liquor, be difficult for producing the gum deposit phenomenon.Yet, the temperature height causes section bar to generate heat fast, after section bar hangs out from hot water tank, the oxidation fenestra of expanded by heating runs into freezing air and can dwindle at once, fenestra fenestra tail end when shrinking fast can be with and suck some pure water on the oxide film surface, the position that watermark often occurs firstly appears out from the local in the majority of the water surface at tail end, and bottom or side present not dried water mark.Pure water in the hot water tank used after for some time, can be acid owing to incorporated residual acid, if be lower than 5, the section bar after scalding directly advances the major trough electrophoresis watermark problem will occur as its pH value.Its reason is: tank liquor is alkalescence in the electrophoresis chamber, directly enter electrophoresis chamber after section bar is scalded after because pH-value differs bigger, compatible property variation between water and the lacquer, the high tank liquor thickness of lacquer concentration in the electrophoresis chamber, electrocoating paint covers the inside with watermark, causes watermark to eliminate.
Summary of the invention
For overcoming above-mentioned shortcoming, the object of the invention is to provide a kind of electrodeposited paint film method.
In order to reach above purpose, the technical solution used in the present invention is: a kind of electrodeposited paint film method, and it may further comprise the steps:
(1) anodic oxidation: metal is carried out anodic oxidation make the metallic surface form oxide film;
(2) scald: the metal after the anodic oxidation immerses hot water tank scalded 5～6 minutes, contained pure water in the described hot water tank, and water temperature is 50 ℃～75 ℃;
(3) washing: the metal after scalding immerses accumulator tank washing and soaked 1～2 minute, contains pure water in this accumulator tank, and the pH value is less than 7.5;
(4) electrophoresis: the metal after the washing immerses electrophoresis chamber and carries out electrophoresis, and the pH value is 7.5～8 in the electrophoresis chamber;
(5) clean: the metal behind the electrophoresis immerses accumulator tank again and cleans.
Further, accumulator tank has a plurality of, and in cleaning step, the metal behind the electrophoresis immerses described a plurality of accumulator tank successively and cleans.
Further, the accumulator tank in water-washing step is in a plurality of accumulator tanks in the cleaning step one.
By adopting technique scheme, a kind of electrodeposited paint film method of the present invention has been changed process sequence, and the section bar after scalding is cleaned electrophoresis more earlier, has solved the watermark problem.Because accumulator tank will clean the section bar after the electrophoresis, so after use after a while, pure water in the accumulator tank can be sneaked into certain lacquer, and be weakly alkaline, and the section bar after scalding is arrived first the accumulator tank washing, the lacquer concentration content low energy of accumulator tank is water-washed away watermark vestige before, section bar raises through washing back pH value simultaneously, advance electrophoresis chamber groove electrophoresis again, the compatibility of water and lacquer improves, and more reduces the pollution to tank liquor.
Embodiment
Below preferred embodiment of the present invention is described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that protection scope of the present invention is made more explicit defining.
A kind of electrodeposited paint film method in the present embodiment, it may further comprise the steps:
(1) anodic oxidation: metal is carried out anodic oxidation make the metallic surface form oxide film;
(2) scald: the metal after the anodic oxidation immerses hot water tank scalds, and contains pure water in the hot water tank, and water temperature is 50 ℃～75 ℃;
(3) washing: the metal after scalding immerses accumulator tank washing and soaked 1～2 minute, contains pure water in this accumulator tank, and the pH value is less than 7.5;
(4) electrophoresis: the metal after the washing immerses electrophoresis chamber and carries out electrophoresis, and the pH value is 7.5～8 in the electrophoresis chamber;
(5) clean: the metal behind the electrophoresis immerses accumulator tank again and cleans.
Accumulator tank in the present embodiment is provided with two, i.e. first accumulator tank and second accumulator tank, and in cleaning step, the metal behind the electrophoresis immerses first accumulator tank successively and second accumulator tank cleans.Because the section bar after scalding arrives first the washing of first accumulator tank, again to the washing of second accumulator tank, so the lacquer concentration content of second accumulator tank will be lower than first accumulator tank.Generally speaking, employing first accumulator tank in water-washing step is washed, if the concentration of first accumulator tank is higher, can changes into second accumulator tank and wash.
Above embodiment only is explanation technical conceive of the present invention and characteristics; its purpose is to allow the people that is familiar with this technology understand content of the present invention and is implemented; can not limit protection scope of the present invention with this; all equivalences that spirit is done according to the present invention change or modify, and all should be encompassed in protection scope of the present invention.
Claims (3)
1. electrodeposited paint film method, it may further comprise the steps:
(1) anodic oxidation: metal is carried out anodic oxidation make the metallic surface form oxide film;
(2) scald: the metal after the anodic oxidation immerses hot water tank scalds, and contains pure water in the described hot water tank, and water temperature is 50 ℃～75 ℃;
(3) washing: the metal after scalding immerses accumulator tank washing and soaked 1～2 minute, contains pure water in this accumulator tank, and the pH value is less than 7.5;
(4) electrophoresis: the metal after the washing immerses electrophoresis chamber and carries out electrophoresis, and the pH value is 7.5～8 in the electrophoresis chamber;
(5) clean: the metal behind the electrophoresis immerses accumulator tank again and cleans.
2. a kind of electrodeposited paint film method according to claim 1, it is characterized in that: described accumulator tank has a plurality of, and in cleaning step, the metal behind the electrophoresis immerses described a plurality of accumulator tank successively and cleans.
3. a kind of electrodeposited paint film method according to claim 2 is characterized in that: the accumulator tank in water-washing step is in a plurality of accumulator tanks in the cleaning step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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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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| Application Number | Priority Date | Filing Date | Title |
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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 true CN103243372A (en) | 2013-08-14 |
| CN103243372B CN103243372B (en) | 2016-08-03 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN106011976A (en) * | 2016-07-06 | 2016-10-12 | 安徽红桥金属制造有限公司 | Surface treatment technology of high-precision spring |
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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 |
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| 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
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| 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 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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 |
| CN106011976A (en) * | 2016-07-06 | 2016-10-12 | 安徽红桥金属制造有限公司 | Surface treatment technology of high-precision spring |
| 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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| CN103243372B (en) | 2016-08-03 |
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