CN116879090A - Detection method for evaluating high-pressure flushing resistance of paint coating - Google Patents
Detection method for evaluating high-pressure flushing resistance of paint coating Download PDFInfo
- Publication number
- CN116879090A CN116879090A CN202310778502.6A CN202310778502A CN116879090A CN 116879090 A CN116879090 A CN 116879090A CN 202310778502 A CN202310778502 A CN 202310778502A CN 116879090 A CN116879090 A CN 116879090A
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- Prior art keywords
- paint coating
- pressure
- test
- evaluating
- resistance
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- 239000003973 paint Substances 0.000 title claims abstract description 72
- 238000000576 coating method Methods 0.000 title claims abstract description 58
- 239000011248 coating agent Substances 0.000 title claims abstract description 57
- 238000011010 flushing procedure Methods 0.000 title claims abstract description 35
- 238000001514 detection method Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000007921 spray Substances 0.000 claims abstract description 20
- 238000005507 spraying Methods 0.000 claims abstract description 8
- 230000007547 defect Effects 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 9
- 238000010998 test method Methods 0.000 claims description 5
- 239000011247 coating layer Substances 0.000 claims description 4
- 238000005336 cracking Methods 0.000 claims description 4
- 238000005187 foaming Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 abstract description 5
- 230000001070 adhesive effect Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
- G01N3/567—Investigating resistance to wear or abrasion by submitting the specimen to the action of a fluid or of a fluidised material, e.g. cavitation, jet abrasion
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention relates to a detection method for evaluating high-pressure flushing resistance of a paint coating, which comprises the following steps: preparing a test template with a paint coating, checking the appearance of the test template, and ensuring that the paint coating has no paint film defect; simulating the paint coating under high pressure and hot water environment conditions by using a high-pressure sprayer; starting a detection test, and during high-pressure flushing, paying attention to adjusting the angle between the spray gun port and the scribing surface of the test sample plate, the distance between the spray gun port and the scribing surface of the test sample plate and the spraying time length; the state of failure at the paint coating score line before and after the test was observed and the width of the slit on the score line was recorded in mm. According to the detection method for evaluating the high-pressure flushing resistance of the paint coating, the high-pressure spraying instrument is utilized to simulate the bearing capacity of the paint coating on high-pressure water under the high-pressure and hot-water environment conditions, and the high-pressure water is evaluated through the change of the adhesive force of the paint coating, so that the risk that a paint film of the paint coating of a vehicle body falls off during high-pressure flushing can be effectively reduced.
Description
Technical Field
The invention belongs to the technical field of whole vehicle spraying, and particularly relates to a detection method for evaluating high-pressure flushing resistance of a paint coating.
Background
With the improvement of living standard, more and more people select automobiles as travel vehicles, and people pay more attention to maintenance and cleaning of the automobiles. Currently, carwashes clean the exterior surfaces of vehicles, mainly by high pressure flushing, which is a challenge to the adhesion of automotive paint coatings.
The existing paint coating adhesive force detection method is mainly a cross-cut test, the adhesive force of the paint coating is required to be tested under the conditions that the test environment temperature is (23+/-2) DEG C and the relative humidity is (50+/-5)%, the detection method cannot accurately predict the bearing capacity of the paint coating on high pressure and hot water in a high-pressure flushing state, and the risk of paint film falling off possibly exists when the outer surface of a vehicle body is cleaned.
Disclosure of Invention
The invention aims to provide a detection method for evaluating high-pressure flushing resistance of a paint coating, so as to solve the problem of reducing the risk of paint film falling off of the paint coating of a vehicle body during high-pressure flushing.
The invention aims at realizing the following technical scheme:
a test method for evaluating the resistance of a paint coating to high pressure flushing comprising the steps of:
A. preparing a test template with a paint coating, checking the appearance of the test template, and ensuring that the paint coating has no paint film defect;
B. simulating the paint coating under high pressure and hot water environment conditions by using a high-pressure sprayer;
C. starting a detection test, and during high-pressure flushing, paying attention to adjusting the angle between the spray gun port and the scribing surface of the test sample plate, the distance between the spray gun port and the scribing surface of the test sample plate and the spraying time length;
D. the state of failure at the paint coating score line before and after the test was observed and the width of the slit on the score line was recorded in mm.
Further, in the step A, the surface of the sample plate is smooth, and the paint coating is free of foaming, cracking and shrinkage cavity.
Further, the step B specifically comprises the following steps:
b1, injecting clear water into the high-pressure jet instrument;
b2, setting high-pressure flushing water temperature:
b3, setting high-pressure flushing pressure:
and B4, destroying the paint coating surface of the test sample plate:
further, in step B2, the water temperature is adjusted to about 70 ℃.
Further, in step B3, the flushing pressure was adjusted to 9MPa.
Further, in step B4, two intersecting straight line segments at a certain angle are engraved on the paint coating layer of the test template by using a single-sided blade until the scribe line is damaged to the substrate.
And C, the spray gun opening of the high-pressure spray instrument and the scribing surface of the test sample plate are 45 degrees.
Still further, the lance orifice was 15cm from the test panel score line. .
Further, the duration of the injection was 20s.
Compared with the prior art, the invention has the beneficial effects that:
according to the detection method for evaluating the high-pressure flushing resistance of the paint coating, the high-pressure spraying instrument is utilized to simulate the bearing capacity of the paint coating on high-pressure water under the high-pressure and hot-water environment conditions, and the high-pressure water is evaluated through the change of the adhesive force of the paint coating, so that the risk that a paint film of the paint coating of a vehicle body falls off during high-pressure flushing can be effectively reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of the steps of the method for evaluating the high pressure rinse resistance of a paint coating according to the present invention.
Detailed Description
The invention is further illustrated by the following examples:
the invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance.
According to the detection method for evaluating the high-pressure flushing resistance of the paint coating, the high-pressure flushing temperature and pressure of water, the intersecting angle of the score lines of the test template, the angle between the spray gun opening and the score line surface of the test template and the distance between the spray gun opening and the score line surface of the test template are accurately controlled in the high-pressure flushing process, the high-pressure spraying instrument is utilized to simulate the bearing capacity of the paint coating on high-pressure water under the high-pressure and hot-water environment conditions, the evaluation is performed through the change of the adhesive force of the paint coating, and the risk of paint film falling off of the paint coating of a vehicle body during the high-pressure flushing process can be effectively reduced.
Specifically, the method comprises the following steps:
firstly, preparing a test template with a paint coating, checking the appearance of the test template, ensuring the surface of the template to be flat, and avoiding the occurrence of paint film defects such as foaming, cracking, shrinkage cavity and the like of the paint coating.
And secondly, simulating the paint coating under high-pressure and hot water environment conditions by using a high-pressure sprayer. Specifically:
1. injecting clear water into the high-pressure jet instrument;
2. high-pressure flushing water temperature setting:
specifically, the water temperature was adjusted to about 70 ℃.
3. High pressure rinse pressure setting:
specifically, the flushing pressure was adjusted to 9MPa.
4. The paint coating surface of the test panel was damaged:
and (3) engraving two intersecting straight line segments with a certain angle on the paint coating layer of the test template by using a single-sided blade until the score line is damaged to the base material.
Then, the detection test is started, and the angle between the nozzle and the scribing surface of the test sample plate, the distance between the nozzle and the scribing surface of the test sample plate and the spraying time length are carefully adjusted during high-pressure flushing.
The surface of a spray gun opening of the high-pressure spray instrument and a test sample plate score line is 45 degrees, the distance between the spray gun opening and the test sample plate score line is about 15cm, and the continuous spray time is 20s.
Finally, the damage state of the paint coating line before and after the test is observed, and the width of the crack on the line edge is recorded in mm.
Example 1
As shown in fig. 1, the detection method for evaluating the high-pressure flushing resistance of the paint coating comprises the following steps:
1. preparing a template, namely preparing a test template with a paint coating, and confirming that the template is smooth, wherein the paint coating state has no paint film defects such as foaming, cracking, shrinkage cavity and the like;
2. preparing equipment, namely injecting clear water into a high-pressure jet instrument, adjusting the water temperature to about 70 ℃, and adjusting the flushing pressure to 9MPa;
3. a single-sided blade is used for engraving two intersecting straight line segments with a certain angle on the paint coating layer of the test template until the scribing is needed to be damaged to the base material;
4. the test, the surface of a spray gun opening of the high-pressure spray instrument and a test sample plate score line is 45 degrees, the distance between the spray gun opening and the test sample plate score line is about 15cm, and the continuous spray time is 20s;
5. and evaluating, namely observing the damage state of the paint coating scribing line before and after the test, and recording the width of the crack on the scribing line in mm.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (9)
1. A test method for evaluating the resistance of a paint coating to high pressure flushing comprising the steps of:
A. preparing a test template with a paint coating, checking the appearance of the test template, and ensuring that the paint coating has no paint film defect;
B. simulating the paint coating under high pressure and hot water environment conditions by using a high-pressure sprayer;
C. starting a detection test, and during high-pressure flushing, paying attention to adjusting the angle between the spray gun port and the scribing surface of the test sample plate, the distance between the spray gun port and the scribing surface of the test sample plate and the spraying time length;
D. the state of failure at the paint coating score line before and after the test was observed and the width of the slit on the score line was recorded in mm.
2. The method for evaluating the high pressure rinse resistance of a paint coating according to claim 1, wherein: and step A, ensuring the surface of the sample plate to be flat, and ensuring that the paint coating has no foaming, cracking and shrinkage cavity.
3. The method for evaluating the high pressure rinse resistance of a paint coating according to claim 1, wherein step B comprises the steps of:
b1, injecting clear water into the high-pressure jet instrument;
b2, setting high-pressure flushing water temperature:
b3, setting high-pressure flushing pressure:
and B4, destroying the paint coating surface of the test template.
4. A test method for evaluating the resistance of a paint coating to high pressure flushing according to claim 3, wherein: and B2, adjusting the water temperature to about 70 ℃.
5. A test method for evaluating the resistance of a paint coating to high pressure flushing according to claim 3, wherein: and step B3, adjusting the flushing pressure to 9MPa.
6. A test method for evaluating the resistance of a paint coating to high pressure flushing according to claim 3, wherein: and B4, engraving two intersecting straight line segments with a certain angle on the paint coating layer of the test template by using a single-sided blade until the scribed line is damaged to the base material.
7. The method for evaluating the high pressure rinse resistance of a paint coating according to claim 1, wherein: and C, enabling the spray gun opening of the high-pressure spray instrument and the scribing surface of the test sample plate to be 45 degrees.
8. The method for evaluating the high pressure rinse resistance of a paint coating according to claim 7, wherein: the nozzle was 15cm from the test panel score line.
9. The method for evaluating the high pressure rinse resistance of a paint coating according to claim 8, wherein: the duration of the injection was 20s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310778502.6A CN116879090A (en) | 2023-06-28 | 2023-06-28 | Detection method for evaluating high-pressure flushing resistance of paint coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310778502.6A CN116879090A (en) | 2023-06-28 | 2023-06-28 | Detection method for evaluating high-pressure flushing resistance of paint coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116879090A true CN116879090A (en) | 2023-10-13 |
Family
ID=88265425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310778502.6A Pending CN116879090A (en) | 2023-06-28 | 2023-06-28 | Detection method for evaluating high-pressure flushing resistance of paint coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116879090A (en) |
-
2023
- 2023-06-28 CN CN202310778502.6A patent/CN116879090A/en active Pending
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