KR101225398B1 - Specimen manufacturing method for testing electro-deposited exterior panel - Google Patents
Specimen manufacturing method for testing electro-deposited exterior panel Download PDFInfo
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- KR101225398B1 KR101225398B1 KR1020100136321A KR20100136321A KR101225398B1 KR 101225398 B1 KR101225398 B1 KR 101225398B1 KR 1020100136321 A KR1020100136321 A KR 1020100136321A KR 20100136321 A KR20100136321 A KR 20100136321A KR 101225398 B1 KR101225398 B1 KR 101225398B1
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Abstract
The present invention relates to a test piece manufacturing method for evaluation of electrodeposition coating uniformity, and more particularly, to a test piece manufacturing method having a different surface resistance.
The present invention provides a base material preparing step of preparing a base material test piece; A masking step of attaching a masking tape in a stripe pattern on a surface of the base material test piece; A Si deposition step of vacuum depositing Si on the base material test piece; Masking removal step of removing the masking tape on the surface of the base material test piece; And a zinc phosphate film forming step of pretreatment in order of degreasing, rinsing, surface adjustment, and chemical conversion to form a zinc phosphate coating on a portion of which Si deposition is not performed. .
Description
The present invention relates to a test piece for electrodeposition coating uniformity evaluation and a method for producing the same, and more particularly to a method for producing a test piece having a different surface resistance locally.
Electrodeposition film formation is greatly influenced by various variables such as local electric field strength, current and voltage distribution, and structural effects of parts and body.
To understand this impact, steel companies are verifying pretreatment and electrodeposition characteristics when developing automotive steels. However, in order to change the surface resistance characteristics of steel sheets in steel companies, it is necessary to steel alloy steel at an arbitrary concentration and go through a rolling process, and to form the specimen in a desired manner by forming the specimen at a desired concentration in a desired position. it's difficult.
It is an object of the present invention to provide a test piece and a method of manufacturing the same, which allows one specimen to have non-uniform surface properties, thereby easily evaluating the uniformity of electrodeposition coating.
An object of the present invention is to provide a test piece manufacturing method that can be used to simulate the different types of steel in one test piece, it is possible to check whether the generation of speckles or streaks generated during electrodeposition coating.
The present invention for achieving this object, the base material preparing step of preparing a base material test piece; A masking step of attaching a masking tape in a stripe pattern on a surface of the base material test piece; A Si deposition step of vacuum depositing Si on the base material test piece; Masking removal step of removing the masking tape on the surface of the base material test piece; And a zinc phosphate film forming step of pretreatment in order of degreasing, rinsing, surface adjustment, and chemical conversion to form a zinc phosphate coating on a portion of which Si deposition is not performed. .
After the film forming step, it is preferable to attach the index tape in the direction crossing the stripe pattern.
The Si deposition step is preferably using a radio frequency magnetron sputtering system (Radio frequency magnetron sputtering system),
The Si deposition step is preferably deposited to a thickness of 200 ~ 500nm.
In addition, the Si deposition step is made under the process conditions of the sputter internal pressure of 4.0 * 10 -2 ~ 4.2 * 10 -2 torr, power 200 ~ 300W, more preferably for 1 to 3 hours.
In addition, the present invention provides a test piece for electrodeposition coating uniformity evaluation, wherein the Si coating layer and the phosphate coating layer are formed in a stripe pattern on the surface.
At this time, it is preferable that the Si coating pattern and the index tape adhered in a direction crossing the phosphate coating pattern.
The present invention allows the surface of one test piece to have locally different electrical characteristics, thereby making it easy to predict the occurrence of streaks or spots occurring during electrodeposition coating.
1 is a diagram showing the main factors affecting the appearance of electrodeposition coating
2 is a process flow chart showing a test piece manufacturing method for evaluation of electrodeposition coating uniformity according to the present invention;
3 is a block diagram showing a test piece of the masking step is completed according to the present invention,
4 is a schematic view showing a test piece in which a Si deposition step according to the present invention is completed;
5 is a block diagram showing a test piece of masking removal step is completed according to the present invention,
6 is a block diagram showing a test piece completed film forming step according to the present invention,
Figure 7 is a block diagram showing a test piece attached with an index tape according to the present invention.
Hereinafter, a test piece manufacturing method for electrodeposition coating uniformity evaluation and an electrodeposition coating uniformity evaluation method using the same will be described with reference to the accompanying drawings.
Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms, only the embodiments of the present invention make the disclosure of the present invention complete, and those of ordinary skill in the art to which the present invention belongs. It is provided to fully inform the scope of the invention, and the invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.
Electrodeposition coating, used as a primary suppression of vehicle corrosion by snow melting salts, immerses a car body made of various steels in an electrodeposition bath, and then electrochemically fixes the polymer on a metal surface to prevent block isocyanate from drying. It is a process of forming the coating film excellent in rust prevention property through a crosslinking reaction.
Electrodeposition coating puts rust resistance first, but it improves the surface roughness of steel by 65 ~ 80%, contributing to the improvement of medium and high quality painting. Recently, as the importance of the exterior quality of automobiles increases, the surface management of steel materials is also strengthened.
The vehicle body is composed of steel sheets of various steel grades. Since the electrodeposition coating may not be uniform depending on the steel grades, the present invention generates streaks at the interface between the steel grades by treating the surface of one test piece non-uniformly. It is to be able to evaluate in advance whether or not a stain occurs.
1 is a view showing the main factors affecting the appearance of electrodeposition coating.
As shown in FIG. 1, paint and appearance defects are not a result of a single factor, but a complex result of various factors such as the surface state of a steel material, structural characteristics of a part, and painting process characteristics.
In particular, when a high-strength steel sheet with an increased alloy amount is applied to reduce the weight of a vehicle, a local electrodeposition coating defect may be locally due to a phosphate formation problem or an uneven electrical property of the steel surface. Therefore, steelmakers also consider paintability in close cooperation with automakers when developing automotive steels.
Figure 2 is a process flow chart showing a test piece manufacturing method for electrodeposition coating uniformity evaluation according to the present invention, Figure 3 shows a test piece is completed the masking step, Figure 4 shows a test piece completed the Si deposition step, Figure 5 6 illustrates a test piece in which a masking removing step is completed, FIG. 6 illustrates a test piece in which a film forming step is completed, and FIG. 7 illustrates a test piece with an index tape attached thereto.
The present invention relates to a test piece manufacturing method for evaluating the uniformity of electrodeposition coating, characterized in that the surface of one test piece is formed to be electrically non-uniform.
In electrodeposition coating of various steel grades, the electrodeposition coating may not be made uniformly according to the difference of steel grades, so spots or streaks may appear. Problems that may occur may be confirmed in advance using the test piece according to the present invention.
As shown, the present invention provides a base material preparing step (S-11) for preparing a base material test piece, a masking step (S-12) for attaching a masking tape in a stripe pattern on the surface of the base material test piece, and the base material test piece Si deposition step of vacuum deposition of Si (S-13), masking removal step (S-14) of removing the masking tape on the surface of the base material specimen, and pretreatment in order of degreasing, washing, surface adjustment, chemical conversion It comprises a zinc phosphate film forming step (S-15) to form a zinc phosphate film on the portion not made.
As the base material used in the base material preparing step (S-11), a steel plate used in a vehicle body may be used, and for example, an SPCC plate material may be used.
Masking step (S-12) is to attach the masking tape in a stripe pattern, as shown in Figure 3, the
Attaching the
The Si deposition step (S-13) may use a radio frequency magnetron sputtering system.
As shown in FIG. 4, Si is not deposited on the portion where the masking tape is attached, and the
At this time, it is preferable to deposit Si in the thickness of 200-500 nm. If the thickness is less than 200 nm, the electrical nonuniformity may not be adequately evaluated. If the thickness is more than 500 nm, the Si deposition process time may be unnecessarily increased.
The Si deposition step is preferably performed for 1 to 3 hours under the process conditions of the sputter internal pressure of 4.0 * 10 -2 ~ 4.2 * 10 -2 torr, power 200 ~ 300W.
These process conditions are obtained through repeated experiments for depositing Si to a thickness of 200 ~ 500nm.
Masking removal step (S-14) is to remove the masking tape from the surface of the specimen. The surface that has undergone the masking removal step (S-14) is in a state where Si deposition is performed in a stripe pattern.
Next, the film forming step (S-15) is made in the order of degreasing, washing with water, surface adjustment, chemical conversion treatment, to form a zinc phosphate coating on the surface of the base material specimen without the Si coating layer.
As shown in FIG. 6, the specimen that passed through the film forming step (S-15) is in a state in which the
7 shows a state in which an index tape is attached to a test piece that has undergone a film forming step in a direction crossing the stripe pattern.
The
Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above embodiments but may be manufactured in various forms, and having ordinary skill in the art to which the present invention pertains. It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without changing the technical spirit or essential features of the present invention. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.
S-11: Base Material Preparation Step
S-12: Masking Step
S-13: Si Deposition Step
S-14: Masking Removal Step
S-15: film formation step
Claims (8)
A masking step of attaching a masking tape in a stripe pattern on a surface of the base material test piece;
A Si deposition step of vacuum depositing Si on the base material test piece;
Masking removal step of removing the masking tape on the surface of the base material test piece; And
A zinc phosphate film forming step of pretreatment in order of degreasing, rinsing, surface adjustment, and chemical conversion to form a zinc phosphate coating on a portion where Si deposition is not carried out.
After the film forming step,
A method of manufacturing a test piece for electrodeposition coating uniformity evaluation, characterized in that for attaching an index tape in a direction crossing the stripe pattern.
The Si deposition step is a test piece manufacturing method for electrodeposition coating uniformity evaluation, characterized in that using a radio frequency magnetron sputtering system (Radio frequency magnetron sputtering system).
The Si deposition step is a test piece manufacturing method for electrodeposition coating uniformity evaluation, characterized in that the deposition to a thickness of 200 ~ 500nm.
The Si deposition step is a test piece manufacturing method for the evaluation of electrodeposition coating uniformity, characterized in that the sputter internal pressure 4.0 * 10 -2 ~ 4.2 * 10 -2 torr, the process conditions of power 200 ~ 300W.
The Si deposition step is a test piece manufacturing method for electrodeposition coating uniformity evaluation, characterized in that made for 1 to 3 hours.
The Si coating layer and the test piece for electrodeposition coating uniformity evaluation, further comprising an index tape attached in a direction crossing the zinc phosphate coating layer.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20100094597 | 2010-09-29 | ||
| KR1020100094597 | 2010-09-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20120033214A KR20120033214A (en) | 2012-04-06 |
| KR101225398B1 true KR101225398B1 (en) | 2013-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020100136321A KR101225398B1 (en) | 2010-09-29 | 2010-12-28 | Specimen manufacturing method for testing electro-deposited exterior panel |
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| KR (1) | KR101225398B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200033658A (en) * | 2018-09-20 | 2020-03-30 | 현대제철 주식회사 | Method for evaluating of hydrogen embrittlement for carbon steels |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11341751A (en) | 1998-05-25 | 1999-12-10 | Matsushita Electric Ind Co Ltd | Cage rotor and manufacturer thereof |
| JP2002313620A (en) | 2001-04-13 | 2002-10-25 | Toyota Motor Corp | Soft magnetic powder with insulating film, soft magnetic molded body using the same, and their manufacturing method |
| KR20060037339A (en) * | 2003-11-21 | 2006-05-03 | 제이에프이 스틸 가부시키가이샤 | Surface treated steel plate excellent in corrosion resistance, electroconductivity and appearance of coating film |
| JP2007309348A (en) | 2006-05-16 | 2007-11-29 | Ntn Corp | Masking in film formation surface treatment to bearing component |
-
2010
- 2010-12-28 KR KR1020100136321A patent/KR101225398B1/en not_active IP Right Cessation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11341751A (en) | 1998-05-25 | 1999-12-10 | Matsushita Electric Ind Co Ltd | Cage rotor and manufacturer thereof |
| JP2002313620A (en) | 2001-04-13 | 2002-10-25 | Toyota Motor Corp | Soft magnetic powder with insulating film, soft magnetic molded body using the same, and their manufacturing method |
| KR20060037339A (en) * | 2003-11-21 | 2006-05-03 | 제이에프이 스틸 가부시키가이샤 | Surface treated steel plate excellent in corrosion resistance, electroconductivity and appearance of coating film |
| JP2007309348A (en) | 2006-05-16 | 2007-11-29 | Ntn Corp | Masking in film formation surface treatment to bearing component |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200033658A (en) * | 2018-09-20 | 2020-03-30 | 현대제철 주식회사 | Method for evaluating of hydrogen embrittlement for carbon steels |
| KR102122653B1 (en) * | 2018-09-20 | 2020-06-12 | 현대제철 주식회사 | Method for evaluating of hydrogen embrittlement for carbon steels |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20120033214A (en) | 2012-04-06 |
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