CN104502719A - Method for testing electrophoresis wet paint film resistance - Google Patents
Method for testing electrophoresis wet paint film resistance Download PDFInfo
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- CN104502719A CN104502719A CN201410752405.0A CN201410752405A CN104502719A CN 104502719 A CN104502719 A CN 104502719A CN 201410752405 A CN201410752405 A CN 201410752405A CN 104502719 A CN104502719 A CN 104502719A
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- electrophoresis
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- wet paint
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Abstract
The invention relates to a method for testing electrophoresis wet paint film resistance. The method is characterized in that a direct-current power supply device on which an electrophoresis power supply is connected with an electrophoresis groove is connected in series with a current meter A; during electrophoretic painting according to a standard method, a current value at the last second of electrophoresis is read; the painting voltage is a voltage at which the paint film thickness meets a standard requirement; the painting time is 3 minutes; during electrophoresis, a workpiece is submerged into the electrophoresis groove by 10 centimeters; when the electrophoresis wet paint film resistance is given, pre-treatment processes of the workpiece need to be marked: ternary zinc phosphating and phosphorus-free film transformation; the electrophoresis wet paint film resistance is computed according to a computation formula. Through testing of the resistance of the wet paint film, the magnitude of the electrophoretic paint throwing power can be judged more intuitively. As proved by a large quantity of test results, when the resistance value of the wet paint film is higher, the film forming capability of the inner cavity of the workpiece is higher.
Description
Technical field
The present invention relates to the method for testing of a kind of electrophoresis wet paint film impedance, in particular to when carrying out electrophoretic painting by standard method, a range that continuous-current plant is connected is the reometer of (1 ~ 2) A, by reading the electrophoresis current value of last 1 second, according to the coating area of application voltage, workpiece, calculate the impedance of electrophoresis wet paint film.
Background technology
Painting dressing automobiles is in environmental protection, today that energy-saving and emission-reduction cry is more and more higher, Pretreatment Technology Before Finishing Harmless (without phosphorus, heavy metal free) becomes development trend, and phosphorization treatment process is about to be replaced by the without phosphorus conversion film technique of environment-friendly type (zirconates process, silane treatment).In addition, in order to improve resource utilization, reduce painting cost, the thickness of cathodic electrophoretic paint there has also been new standard, and namely vehicle body outside surface electrodeposited paint film thickness is reduced to (15 ~ 18) μm from (18 ~ 22) μm.As Japanese Toyota just planned that to the target of electrodeposited paint film be vehicle body outside surface 15 μm, inside surface 10 μm as far back as 2006, namely four pieces of box throwing powers reach 0.67, and weight of coated paint can be made to reduce about 20%, and comprehensive production cost reduces by 10%.At home and abroad motor corporation has formed the gesture that exploitation adopts film-type height throwing power electrophoretic coating at present.
When new environment-friendly type without phosphorus conversion film technique replaces phosphorization treatment process operation application traditional before electrophoresis, find that the throwing power of cathode electro-coating declines, the swimming affecting vehicle body inner chamber is coated with quality.Reason is that the new without phosphorus conversion film of environment-friendly type is very thin, only has about 1/10 of current phosphating coat thickness, has had a strong impact on the throwing power of follow-up electrophoretic painting.Found by lot of experiments, high throwing power electrophoretic coating newly developed must be adopted, just can solve the problem.
Affect a lot of because have of electrophoretic coating throwing power, one of them more crucial factor is the characteristic of electrophoretic coating itself, i.e. the conductivity of electrophoresis groove liquid and wet paint film resistance, and the former guarantees the thickness at position, casket chamber, and the latter controls outside plate thickness.Conductivity is existing method of testing at present, but wet paint film resistance does not also have method of testing at present.
By patent retrieval, do not retrieve the patent about electrophoretic coating wet paint film method for testing resistance.
Summary of the invention
The object of this invention is to provide the method for testing of a kind of electrophoresis wet paint film impedance, it, by the impedance of test wet paint film, more intuitive judgment can go out the height of electrophoretic coating throwing power, show according to many experimental results, wet paint film resistance value is larger, and its workpiece lumen film forming ability is stronger.
Technical scheme of the present invention is achieved in that the method for testing of a kind of electrophoresis wet paint film impedance, it is characterized in that: a range of connecting on the continuous-current plant that electrophoresis power is connected with electrophoresis tank is the reometer A of 1000 mA ~ 2000 mA, degree of accuracy 2mA;
Concrete testing procedure is:
When carrying out electrophoretic painting by standard method, by reading the electrophoresis current value of last 1 second; Voltage when application voltage should select film thickness to be standard-required; Being coated with ETL estimated time of loading is 3 minutes; Workpiece coating area chooses the model of 70 mm × 150 mm, and immerse electrophoresis tank 10cm during electrophoresis, such coating area is 0.014 m
2; The pre-treating technology of workpiece to be indicated: ternary zinc phosphatization, without phosphorus conversion film when providing the impedance of electrophoresis wet paint film; Press
computing formula calculate the impedance of electrophoresis wet paint film, in formula:
R: wet paint film impedance, unit is Ohms sq rice, (Ω m
2);
U: application voltage, unit is volt (V);
A: current value when last 1 second, unit is ampere (A);
S: Workpiece coating area, unit is a square metre (m
2).
Good effect of the present invention is its size according to electrophoresis wet paint film, and intuitive judgment goes out the height of electrophoretic coating throwing power, correctly can evaluate the quality of electrophoretic coating.
Accompanying drawing explanation
Fig. 1 is the syndeton of electrophoresis wet paint film testing impedance of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention will be further described: as shown in Figure 1, the method of testing of a kind of electrophoresis wet paint film impedance, it is characterized in that: a range of connecting on the continuous-current plant that electrophoresis power 1 is connected with electrophoresis tank 2 is the reometer A of 1000 mA ~ 2000 mA, degree of accuracy 2mA;
Concrete testing procedure is:
When carrying out electrophoretic painting by standard method, by reading the electrophoresis current value of last 1 second; Voltage when application voltage should select film thickness to be standard-required; Being coated with ETL estimated time of loading is 3 minutes; Workpiece coating area chooses the model of 70 mm × 150 mm, and immerse electrophoresis tank 10cm during electrophoresis, such coating area is 0.014 m
2; The pre-treating technology of workpiece to be indicated: ternary zinc phosphatization, without phosphorus conversion film when providing the impedance of electrophoresis wet paint film; Press
computing formula calculate the impedance of electrophoresis wet paint film, in formula:
R: wet paint film impedance, unit is Ohms sq rice, (Ω m
2);
U: application voltage, unit is volt (V);
A: current value when last 1 second, unit is ampere (A);
S: Workpiece coating area, unit is a square metre (m
2).
embodiment one
The high throwing power electrophoretic paint that certain coating material production producer H produces:
1, in 4 L electrophoresis tanks, former for electrophoretic paint paint working fluid or on-the-spot tank liquor are adjusted to the standard operating conditions of material.
2, be that the reometer series connection of (1 ~ 2) A is received in the DC power supply circuit of regulation by range, selected range.
3, choose the model of 70 mm × 150 mm, the pre-treating technology of test piece chooses ternary zinc phosphating process, is numbered three pieces of models.
4, model is immersed electrophoresis tank 10cm, carry out electrophoresis by standard conditions.
5, voltage 240V during application voltage selection film thickness (15 ~ 19) μm, electrophoresis time is 3 minutes.
Current value when 6, reading last 1 second of electrophoresis is 23.9mA.
7, be 1405.9 Ω m according to formulae discovery electrophoretic coating wet paint film resistance
2.
embodiment two
The general electrophoresis coating that certain coating material production producer G produces:
1, in 4 L electrophoresis tanks, former for electrophoretic paint paint working fluid or on-the-spot tank liquor are adjusted to the standard operating conditions of material.
2, be that the reometer series connection of (1 ~ 2) A is received in the DC power supply circuit of regulation by range, selected range.
3, choose the model of 70 mm × 150 mm, the pre-treating technology of test piece chooses ternary zinc phosphorization treatment process, is numbered three pieces of models.
4, model is immersed electrophoresis tank 10cm, carry out electrophoresis by standard conditions.
5, voltage 210V during application voltage selection film thickness (20 ~ 21) μm, electrophoresis time is 3 minutes.
Current value when 6, reading last 1 second of electrophoresis is 26.9mA.
7, be 1092.9 Ω m according to formulae discovery electrophoretic coating wet paint film resistance
2.
embodiment three
1, with the throwing power of the high throwing power electrophoretic paint of four pieces of box method test manufacturer H production be
0.64。.
2, the throwing power testing the general electrophoresis paint of manufacturer G production by four pieces of box methods is 0.47..
3, according to thing embodiment one and embodiment two, high throwing power electrophoretic coating compares with general electrophoresis coating, reduces coating consumption 22%.
Claims (1)
1. a method of testing for electrophoresis wet paint film impedance, is characterized in that: a range of connecting on the continuous-current plant that electrophoresis power is connected with electrophoresis tank is the reometer A of 1000 mA ~ 2000 mA, degree of accuracy 2mA;
Concrete testing procedure is:
When carrying out electrophoretic painting by standard method, by reading the electrophoresis current value of last 1 second; Voltage when application voltage should select film thickness to be standard-required; Being coated with ETL estimated time of loading is 3 minutes; Workpiece coating area chooses the model of 70 mm × 150 mm, and immerse electrophoresis tank 10cm during electrophoresis, such coating area is 0.014 m
2; The pre-treating technology of workpiece to be indicated: ternary zinc phosphatization, without phosphorus conversion film when providing the impedance of electrophoresis wet paint film; Press
computing formula calculate the impedance of electrophoresis wet paint film, in formula:
R: wet paint film impedance, unit is Ohms sq rice, (Ω m
2);
U: application voltage, unit is volt (V);
A: current value when last 1 second, unit is ampere (A);
S: Workpiece coating area, unit is a square metre (m
2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410752405.0A CN104502719A (en) | 2014-12-10 | 2014-12-10 | Method for testing electrophoresis wet paint film resistance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410752405.0A CN104502719A (en) | 2014-12-10 | 2014-12-10 | Method for testing electrophoresis wet paint film resistance |
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| CN104502719A true CN104502719A (en) | 2015-04-08 |
Family
ID=52944130
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410752405.0A Pending CN104502719A (en) | 2014-12-10 | 2014-12-10 | Method for testing electrophoresis wet paint film resistance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106290134A (en) * | 2016-08-24 | 2017-01-04 | 奇瑞商用车（安徽）有限公司 | A kind of automobile electrophoretic paint sharp edge covering performance test method |
| CN107179333A (en) * | 2017-06-20 | 2017-09-19 | 巴斯夫上海涂料有限公司 | Detect method and its application of the electrodeposited paint film to base material side along protective value |
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| CN1198192A (en) * | 1996-07-23 | 1998-11-04 | 日本油漆株式会社 | Cationic electrodeposition process and coating composition for cationic electrodeposition |
| CN1346859A (en) * | 2000-10-11 | 2002-05-01 | 关西油漆株式会社 | Cationic paint composition |
| JP2004179311A (en) * | 2002-11-26 | 2004-06-24 | Seiko Epson Corp | Semiconductor substrate and method for manufacturing the same, electrooptical apparatus, and electronic apparatus |
| CN1712461A (en) * | 2004-06-16 | 2005-12-28 | 日本油漆株式会社 | Cationic electrodeposition coating composition |
| CN1849416A (en) * | 2003-09-11 | 2006-10-18 | 日本油漆株式会社 | Method for forming cathodic electrodeposition film which forms electric through-hole therein, and cation electrodeposition paint which reliably forms electric through-hole |
| US20090208733A1 (en) * | 2008-02-15 | 2009-08-20 | Woo-Jae Lee | Display devices with transparent electrodes containing nanocarbon materials |
| JP2010129733A (en) * | 2008-11-27 | 2010-06-10 | Seiko Epson Corp | Thin-film transistor, electro-optical device, and electronic apparatus |
| CN102768261A (en) * | 2012-07-02 | 2012-11-07 | 奇瑞汽车股份有限公司 | On-site detection device for throwing power of electrophoretic paint and detection method for same |
-
2014
- 2014-12-10 CN CN201410752405.0A patent/CN104502719A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1198192A (en) * | 1996-07-23 | 1998-11-04 | 日本油漆株式会社 | Cationic electrodeposition process and coating composition for cationic electrodeposition |
| CN1346859A (en) * | 2000-10-11 | 2002-05-01 | 关西油漆株式会社 | Cationic paint composition |
| JP2004179311A (en) * | 2002-11-26 | 2004-06-24 | Seiko Epson Corp | Semiconductor substrate and method for manufacturing the same, electrooptical apparatus, and electronic apparatus |
| CN1849416A (en) * | 2003-09-11 | 2006-10-18 | 日本油漆株式会社 | Method for forming cathodic electrodeposition film which forms electric through-hole therein, and cation electrodeposition paint which reliably forms electric through-hole |
| CN1712461A (en) * | 2004-06-16 | 2005-12-28 | 日本油漆株式会社 | Cationic electrodeposition coating composition |
| US20090208733A1 (en) * | 2008-02-15 | 2009-08-20 | Woo-Jae Lee | Display devices with transparent electrodes containing nanocarbon materials |
| JP2010129733A (en) * | 2008-11-27 | 2010-06-10 | Seiko Epson Corp | Thin-film transistor, electro-optical device, and electronic apparatus |
| CN102768261A (en) * | 2012-07-02 | 2012-11-07 | 奇瑞汽车股份有限公司 | On-site detection device for throwing power of electrophoretic paint and detection method for same |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106290134A (en) * | 2016-08-24 | 2017-01-04 | 奇瑞商用车（安徽）有限公司 | A kind of automobile electrophoretic paint sharp edge covering performance test method |
| CN107179333A (en) * | 2017-06-20 | 2017-09-19 | 巴斯夫上海涂料有限公司 | Detect method and its application of the electrodeposited paint film to base material side along protective value |
| CN107179333B (en) * | 2017-06-20 | 2019-08-16 | 巴斯夫上海涂料有限公司 | Electrodeposited paint film is detected to base material side along the method and its application of protective value |
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Application publication date: 20150408 |