CN109763161A - Automobile parts electrophoresis coating technique - Google Patents
Automobile parts electrophoresis coating technique Download PDFInfo
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- CN109763161A CN109763161A CN201910251309.0A CN201910251309A CN109763161A CN 109763161 A CN109763161 A CN 109763161A CN 201910251309 A CN201910251309 A CN 201910251309A CN 109763161 A CN109763161 A CN 109763161A
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- automobile parts
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Abstract
The present invention provides a kind of automobile parts electrophoresis coating technique, including processes such as upper extension pre-treatment, pretreatment, shielding processing and electrophoretic paintings, electrophoresis coating technique provided by the present invention is first handled automobile parts surface before hanging, keep automobile parts surface cleaner, more conducively progress subsequent processing processing；Its surface is further handled after upper extension, keep automobile parts surface cleaner, keep the painting effect on automobile parts surface more preferable, through detecting, the automobile parts of coating, especially irregular accessory are carried out using electrophoresis coating technique of the invention, the smooth no particle in surface and storage stability is good, and it is with short production cycle, the production time can be saved, and then improve production efficiency.
Description
[technical field]
The invention belongs to irregular automobile fitting part electrophoretic painting correlative technology fields, and in particular to a kind of automobile parts electrophoresis
Coating process.
[background technique]
The component of automobile parts especially seat generally uses black electrophore tic to carry out anticorrosive coating, but need to do to privileged sites
Shadow shield needs to weld again convenient for following process.It is special for shape, area is larger, specific position shielded it is more difficult,
And screening-off position also needs the problem of carrying out antirust, seldom needing antirust in view of screening-off position in existing coating process, therefore
Need to develop a kind of coating process, shadow shield position irregular for workpiece shapes needs effectively to be shielded, to avoid screen
Position is covered to penetrate into liquid medicine in process of production and screening-off position is made to be oxidized the problem of easily getting rusty.
[summary of the invention]
The present invention provides a kind of automobile parts electrophoresis coating technique, which is mainly used for applying irregular workpiece
Dress, moreover it is possible to local screening-off position effectively be shielded, main technical schemes of the invention are as follows:
S1: above hang pre-treatment: successively the following steps are included:
1a: using concentration be 40-60g/L degreaser 40-60 DEG C at a temperature of to the automobile parts surface degreasing
20-60min；
1b: the automobile parts after oil removing are used into the pickling in the acid solution that concentration is 450-250g/L
30-50min；
1c: by through the automobile parts after pickling concentration be 40-60g/L alkaline solution at 70-80 DEG C
At a temperature of impregnate 5-20min；
S2: it pretreatment: after hanging pre-treatment on S1, will be hung on hanger on the automobile parts, again to the vapour
Vehicle accessory carries out surface preparation, and the S2 in turn includes the following steps:
2a first time degreasing: by the automobile parts in the first degreasing agent that basicity is 16-25pt 40-50 DEG C of temperature
Lower degreasing 120-150s, makes the surface cleaning of the automobile parts without grease stain；
2b first time ultrasonic oil removal: by the automobile parts after ungrease treatment basicity is 15-20pt, temperature is
Ultrasonic cleaning 120-150s is carried out in 40-60 DEG C of the first cleaning agent；
2c sun solution: the automobile parts are washed after the sun solution liquid middle-jiao yang, function of the spleen and stomach solution 120s that basicity is 40-60g/L, until water
The limpid no muddiness of matter；
The adjustment of the surface 2d: surface treatment 60- is carried out in the environment of 9.0-10.5 using the table adjustment of 0.1-1.5g/L
90s；
2e phosphorating treatment: in the phosphating solution that total acid is 18-21pt, free acid 0.8-1.1pt, promotion value are 1.8-2.0
It is washed after middle phosphatization 200-300s, until the limpid no muddiness of water quality；
2f baking: by the automobile parts after phosphorating treatment 80-120 DEG C at a temperature of baking 20-40min after, under
It hangs, i.e., takes off the automobile parts from hanger, when lower extension, handle with care, avoid the automobile parts bump injury；
S3 shielding processing: the automobile parts surface is carried out at shielding using at least one of adhesive tape, cushion rubber, glue nail
Reason, the shielding processing mode are that at least one of adhesive tape, cushion rubber, glue nail are attached to the surface of the automobile parts, will
Second of the automobile parts upper extension；
S4 electrophoretic painting: after second of upper extension, electrophoretic painting is carried out to the automobile parts, the electrophoretic painting successively wraps
Include following steps:
Second of degreasing of 4a: the degreasing 120-150s in the second degreasing agent that basicity is 16-25pt, temperature is 40-50 DEG C；
Second of ultrasonic oil removal of 4b: surpassed in the second cleaning agent that basicity is 15-20pt, temperature is 40-60 DEG C
It is washed after sound wave cleaning 120-150s, until the limpid no muddiness of water quality；
4e external coating: by the automobile parts solid content is 18-22%, pH 5.8-6.4, temperature are 28-32's
It is washed after electrophoresis 180-250s in electrophoresis liquid, until the limpid no muddiness of water quality；
4f blows water: by the automobile parts surface water droplet drying after, 180-200 DEG C at a temperature of toast 40-
60min, second of lower extension, that is, complete the coating on automobile parts surface.
Further, the degreaser used in the S1 includes tertiary sodium phosphate and sodium metasilicate；The acid solution
For hydrochloric acid；The alkaline solution is sodium hydroxide.
Further, first degreasing agent used in the S2 includes sodium carbonate, sodium metasilicate and sodium bicarbonate；
First cleaning agent includes sodium carbonate and sodium metasilicate；The sun solution liquid includes sodium hydroxide, sodium metasilicate and surface-active
Agent；It is zinc salt that the table, which is adjusted,；The phosphating solution includes phosphoric acid and zinc oxide.
Further, in the S2 after phosphorating treatment, the alramenting film film weight >=2.0g/m of the automobile parts2, knot
Crystalline substance is having a size of 3-7 μm.
Further, adhesive tape used in the S3 is by its in polyimides, organic pressure-sensitive gel, fluorine molding material
The mixture of middle one or more is prepared, and the cushion rubber, glue nail are prepared by high temperature resistant silica gel material.
Further, second degreasing agent in the S4 includes sodium carbonate, sodium metaphosphate and sodium bicarbonate；Described
Two cleaning agents include sodium carbonate and sodium metasilicate；The electrophoresis liquid includes epoxy resin, polyurethane resin and acrylic resin.
Further, the automobile parts are irregular accessory.
Compared to the prior art, the beneficial effects of the present invention are:
First automobile parts surface is handled before upper extension, after oil removing, pickling and caustic dip process, automobile parts surface
Greasy dirt understands cleaner, and pickling can remove automobile parts surface scale, and caustic dip can make automobile parts in circular flow
Antirust keeps automobile parts surface cleaner, more conducively progress subsequent processing processing；Its surface is further located after upper extension
Reason, keeps automobile parts surface cleaner, keeps the painting effect on automobile parts surface more preferable, through detecting, use electricity of the invention
Electrophoresis painting dressing technique carries out the automobile parts of coating, especially irregular accessory, the smooth no particle in surface, and storage stability
Good (under normal room temperature condition of storage, place a month non-corrosive and the problem of surface aging do not occur), and it is with short production cycle, it can
The production time is saved, and then improves production efficiency.
[Detailed description of the invention]
Fig. 1 is the structural schematic diagram before 1 coating of workpiece of embodiment 1；
Fig. 2 is the effect picture after 1 coating of workpiece of embodiment 1；
Fig. 3 is the effect picture after 2 coating of workpiece of embodiment 2.
[specific embodiment]
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, to this
Invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, and does not have to
It is of the invention in limiting.
Embodiment 1
Prepare an irregular automobile parts 1 (hereinafter referred to as workpiece 1) as shown in Figure 1, is applied using electrophoresis process
Dress, the specific process is as follows:
S1: above hanging pre-treatment, successively the following steps are included:
1a: using concentration be 40-60g/L degreaser 40-60 DEG C at a temperature of to the automobile parts surface degreasing
20-60min is clean by the cleaning oil pollution on 1 surface of workpiece；
1b: the automobile parts after oil removing are used into the pickling in the acid solution that concentration is 450-250g/L
30-50min removes 1 surface scale of workpiece；
1c: by through the automobile parts after pickling concentration be 40-60g/L alkaline solution at 70-80 DEG C
At a temperature of impregnate 5-20min, prevent from getting rusty in 1 circular flow of workpiece, guarantee 1 coating of workpiece after storage time it is longer；
S2: pretreatment will be hung on hanger, again to the vapour after hanging pre-treatment on S1 on the automobile parts
Vehicle accessory carries out surface preparation, and the S2 in turn includes the following steps:
2a first time degreasing: by the automobile parts in the first degreasing agent that basicity is 16-25pt 40-50 DEG C of temperature
Lower degreasing 120-150s, the greasing substance etc. of metal surface, makes the automobile parts when removing oil, the rouge, punching press on 1 surface of workpiece
Surface cleaning without grease stain；
2b first time ultrasonic oil removal: by the automobile parts after ungrease treatment basicity is 15-20pt, temperature is
Ultrasonic cleaning 120-150s is carried out in 40-60 DEG C of the first cleaning agent, the bubble and the first cleaning agent generated using ultrasonic wave
Double action achievees the purpose that further to clean piece surface greasy dirt；
2c sun solution: the automobile parts are washed after the sun solution liquid middle-jiao yang, function of the spleen and stomach solution 120s that basicity is 40-60g/L, until water
The limpid no muddiness of matter；The purpose of sun solution is to remove a small amount of greasy dirt on part, and other dirts for adhering to piece surface
Dye is cleaned out；
The adjustment of the surface 2d: surface treatment 60- is carried out in the environment of 9.0-10.5 using the table adjustment of 0.1-1.5g/L
90s, surface adjustment can allow metal surface form finer and close crystallization；
2e phosphorating treatment: in the phosphating solution that total acid is 18-21pt, free acid 0.8-1.1pt, promotion value are 1.8-2.0
It is washed after middle phosphatization 200s, until the limpid no muddiness of water quality；Parkerized purpose is that generating one layer in workpiece 1 has well
Corrosion resistance and alkaline-resisting soluble phosphoric acid salt epithelium, the binding force of subsequent coating can be significantly improved；2f baking: after phosphorating treatment
The automobile parts 80-120 DEG C at a temperature of baking 20-40min after, lower extension takes the automobile parts from hanger
Get off, when lower extension, handles with care, avoid the automobile parts bump injury；
S3: shielding processing: shielding processing is carried out to the position without coating, processing mode is that adhesive tape is attached at the vapour
The position that vehicle accessory surface need to shield；After shielding processing, by second of the automobile parts upper extension；
S4 electrophoretic painting: second it is upper hang after, electrophoretic painting carried out to the automobile parts, electrophoretic painting successively include with
Lower step:
Second of degreasing of 4a: the degreasing 120-150s in the second degreasing agent that basicity is 16-25pt, temperature is 40-50 DEG C；
Second of ultrasonic oil removal of 4b: surpassed in the second cleaning agent that basicity is 15-20pt, temperature is 40-60 DEG C
It is washed after sound wave cleaning 120-150s, until the limpid no muddiness of water quality；
4e external coating: by the automobile parts solid content is 18-22%, pH 5.8-6.4, temperature are 28-32's
It is washed after electrophoresis 180-250s in electrophoresis liquid, until the limpid no muddiness of water quality；
4f blows water: by the automobile parts surface water droplet drying after, 180-200 DEG C at a temperature of toast 40-
60min, second of lower extension, that is, complete the coating on automobile parts surface；When second of lower extension, it need to handle with care, avoid bump injury.
In the above embodiment of the present embodiment, the degreaser in S1 includes tertiary sodium phosphate and sodium metasilicate, specially will
CY2908 degreasing powder, which is dissolved in the water, to be prepared；Acid solution is hydrochloric acid solution；Alkaline solution is sodium hydroxide solution；
The first degreasing agent in S2 includes sodium carbonate, sodium metasilicate and sodium bicarbonate, specially Surfcleaner EC90
Metal degreasing agent is soluble in water to be prepared；First cleaning agent includes sodium carbonate and sodium metasilicate, specially alkalescent ultrasonic wave
Degreaser；Sun solution liquid includes sodium hydroxide, sodium metasilicate and surfactant, and specially T-EC-90L is low, and bubble electrolytic degreasing agent is molten
Yu Shuizhong is prepared；It is zinc salt, specially SURFFINE GL1 metal liquid surface conditioner that the table, which is adjusted,；The phosphatization
Liquid includes phosphoric acid and zinc oxide, and specially SURFDINE SD2500 is melted into agent, after phosphorating treatment, the phosphorus of 1 surface of workpiece formation
Change film film weight is 2g/m2, crystal size is 5 μm.
Adhesive tape used in S3 is prepared by polyimides；
The second degreasing agent is prepared in S4 for Surfcleaner EC90 metal degreasing agent is soluble in water；Second cleaning agent
For alkalescent ultrasonic oil removal agent；Electrophoresis liquid includes epoxy resin, polyurethane resin and acrylic resin, specially
POWERNICS 150F-1BLACK (POWERNICS 150F-2 also can be used) is soluble in water to be prepared；
After electrophoretic painting effect it is as shown in Figure 2.
CY2908 degreasing powder, sodium hydroxide used in the present embodiment, alkalescent ultrasonic oil removal agent are Jiangmen city
Xinhui District Gao Xin Chemical Co., Ltd. is produced；Used hydrochloric acid is the industry of Zhuhai City Hua Chengda Chemical Co., Ltd. production
Hydrochloric acid；The low bubble electrolytic degreasing agent of Surfcleaner EC90 metal degreasing agent, T-EC-90L, SURFFINE GL1 molten metal body surface
Face regulator, SURFDINE SD2500 chemical conversion agent, POWERNICS 150F-1BLACK and POWERNICS 150F-2 are vertical
Nation (Shanghai) Chemical Co., Ltd. is produced.
It should be noted that medicament provided by the present embodiment is only further explained used herein, should not recognize
For present invention is limited only to use these medicaments.
Embodiment 2
The automobile parts (workpiece 2) for taking another irregular structure carry out electrophoretic painting according to the technique of embodiment 1, with reality
The difference for applying example is that phosphating coat film weight is 5g/m2, crystal size is 7 μm；Painting effect is as shown in Figure 3.
The surface effect of workpiece 1 and 2 coating of workpiece is observed, equal surface is uniform and smooth without raised little particle, illustrates coating
It works well；Workpiece 1 and workpiece 2 are subjected to stable storing test again, test method is as follows:
After workpiece 1 and 2 is placed one month under normal room temperature condition of storage, then its surface is observed, workpiece 1 and workpiece 2
Equal non-corrosive, and find the state indifference that surface and rigid coating terminate, illustrate that workpiece storage has good stability.
To sum up, automobile parts electrophoresis coating technique provided by the present invention, painting effect is good and storage stability is good, and
It is with short production cycle, the production time can be saved, and then improve production efficiency.
The above content is combine specific optimal technical scheme further detailed description of the invention, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For the professional technician of the technical field of the invention,
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (7)
1. a kind of automobile parts electrophoresis coating technique, which is characterized in that in turn include the following steps:
S1: pre-treatment is above hung；
S2: pretreatment；
S3: shielding processing；
S4: electrophoretic painting；
It is characterized in that, the S1 successively the following steps are included:
1a: using concentration be 40-60g/L degreaser 40-60 DEG C at a temperature of to the automobile parts surface degreasing 20-
60min；
1b: the automobile parts after oil removing are used into the pickling 30- in the acid solution that concentration is 450-250g/L
50min；
1c: by through the automobile parts after pickling in the alkaline solution that concentration is 40-60g/L in 70-80 DEG C of temperature
Lower immersion 5-20min；
After hanging pre-treatment on S1, it will be hung on hanger on the automobile parts, carry out the S2 pretreatment, the S2 is successively wrapped
Include following steps:
2a first time degreasing: by the automobile parts basicity be 16-25pt the first degreasing agent in 40-50 DEG C at a temperature of
Degreasing 120-150s makes the surface cleaning of the automobile parts without grease stain；
2b first time ultrasonic oil removal: by the automobile parts after ungrease treatment basicity be 15-20pt, temperature 40-60
DEG C the first cleaning agent in carry out ultrasonic cleaning 120-150s；
2c sun solution: the automobile parts are washed after the sun solution liquid middle-jiao yang, function of the spleen and stomach solution 120s that basicity is 40-60g/L, until water quality is clear
Clear no muddiness；
The adjustment of the surface 2d: surface treatment 60-90s is carried out in the environment of 9.0-10.5 using the table adjustment of 0.1-1.5g/L；
2e phosphorating treatment: the phosphorus in the phosphating solution that total acid is 18-21pt, free acid 0.8-1.1pt, promotion value are 1.8-2.0
It is washed after changing 200-300s, until the limpid no muddiness of water quality；2f baking: by the automobile parts after phosphorating treatment in 80-120
After toasting 20-40min at a temperature of DEG C, lower extension；
S3 shielding processing: carrying out shielding processing to the automobile parts surface using at least one of adhesive tape, cushion rubber, glue nail,
The shielding processing mode is that at least one of adhesive tape, cushion rubber, glue nail are attached to the surface of the automobile parts；
After S3 carries out shielding processing, hang the automobile parts second are upper, second upper hang after to the automobile parts into
Row S4 electrophoretic painting, the S4 successively the following steps are included:
Second of degreasing of 4a: the degreasing 120-150s in the second degreasing agent that basicity is 16-25pt, temperature is 40-50 DEG C；
Second of ultrasonic oil removal of 4b: ultrasonic wave is carried out in the second cleaning agent that basicity is 15-20pt, temperature is 40-60 DEG C
It is washed after cleaning 120-150s, until the limpid no muddiness of water quality；
4e external coating: by the automobile parts in the electrophoresis that solid content is 18-22%, pH 5.8-6.4, temperature are 28-32
It is washed after electrophoresis 180-250s in liquid, until the limpid no muddiness of water quality；
4f blows water: by the automobile parts surface water droplet drying after, 180-200 DEG C at a temperature of toast 40-60min,
Second of lower extension, that is, complete the coating on automobile parts surface.
2. automobile parts electrophoresis coating technique according to claim 1, which is characterized in that described used in the S1
Degreaser includes tertiary sodium phosphate and sodium metasilicate；The acid solution is hydrochloric acid；The alkaline solution is sodium hydroxide.
3. automobile parts electrophoresis coating technique according to claim 1, which is characterized in that described used in the S2
First degreasing agent includes sodium carbonate, sodium metasilicate and sodium bicarbonate；First cleaning agent includes sodium carbonate and sodium metasilicate；Institute
Stating sun solution liquid includes sodium hydroxide, sodium metasilicate and surfactant；It is zinc salt that the table, which is adjusted,；The phosphating solution includes phosphoric acid
And zinc oxide.
4. automobile parts electrophoresis coating technique according to claim 3, which is characterized in that in the S2 after phosphorating treatment,
The alramenting film film weight >=2.0g/m of the automobile parts2, crystal size is 3-7 μm.
5. automobile parts electrophoresis coating technique according to claim 1, which is characterized in that adhesive tape used in the S3
It is prepared by one of or two or more mixture in polyimides, organic pressure-sensitive gel, fluorine molding material, it is described
Cushion rubber, glue nail are prepared by high temperature resistant silica gel material.
6. automobile parts electrophoresis coating technique according to claim 1, which is characterized in that described second in the S4 is de-
Rouge agent includes sodium carbonate, sodium metaphosphate and sodium bicarbonate；Second cleaning agent includes sodium carbonate and sodium metasilicate；The electrophoresis
Liquid includes epoxy resin, polyurethane resin and acrylic resin.
7. automobile parts electrophoresis coating technique according to claim 1, which is characterized in that the automobile parts are irregular
Accessory.
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| CN201910251309.0A CN109763161A (en) | 2019-03-29 | 2019-03-29 | Automobile parts electrophoresis coating technique |
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|---|---|---|---|
| CN201910251309.0A CN109763161A (en) | 2019-03-29 | 2019-03-29 | Automobile parts electrophoresis coating technique |
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Cited By (5)
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| CN111621831A (en) * | 2020-04-21 | 2020-09-04 | 昆山永生涂装有限公司 | Electrophoresis process for part local non-coating |
| CN112226804A (en) * | 2020-10-13 | 2021-01-15 | 六安科亚信息科技有限公司 | Electrophoretic coating method for automobile parts |
| CN113088953A (en) * | 2019-12-23 | 2021-07-09 | 绵阳海立电器有限公司 | Surface treatment method for compressor |
| CN113702475A (en) * | 2021-08-04 | 2021-11-26 | 东风本田汽车有限公司 | Simulation test method for pollution degree of body-in-white welding glue to coating tank liquid |
| CN114318320A (en) * | 2021-11-22 | 2022-04-12 | 南通申海工业科技有限公司 | Passivation process for phosphate film |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113088953A (en) * | 2019-12-23 | 2021-07-09 | 绵阳海立电器有限公司 | Surface treatment method for compressor |
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| CN113702475A (en) * | 2021-08-04 | 2021-11-26 | 东风本田汽车有限公司 | Simulation test method for pollution degree of body-in-white welding glue to coating tank liquid |
| CN113702475B (en) * | 2021-08-04 | 2023-10-27 | 东风本田汽车有限公司 | Simulation test method for pollution degree of welding glue of white car body to coating bath liquid |
| CN114318320A (en) * | 2021-11-22 | 2022-04-12 | 南通申海工业科技有限公司 | Passivation process for phosphate film |
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