CN107144524B - Accelerated corrosion test method for vehicle body test chamber - Google Patents
Accelerated corrosion test method for vehicle body test chamber Download PDFInfo
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- CN107144524B CN107144524B CN201710365565.3A CN201710365565A CN107144524B CN 107144524 B CN107144524 B CN 107144524B CN 201710365565 A CN201710365565 A CN 201710365565A CN 107144524 B CN107144524 B CN 107144524B
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Abstract
A vehicle body test chamber accelerated corrosion test method comprises the following steps: providing a body-in-white provided with four doors, two covers and sealing parts, and completing welding and coating processes; cleaning and drying the car body, measuring the thickness of a coating and a primer on the car body, marking the defective part on the surface of the car body, taking a picture, sealing a hole on the car body, marking a line to a metal matrix at a specific position of the car body, and installing a corrosion standard sample plate, a standard coating sample plate and a process coating sample plate at the specific position of the car body; taking a specific time interval as a cycle, implementing a vehicle body corrosion test, and executing a neutral salt spray test, a normal temperature test and a damp-heat test in each cycle; after the test is finished, washing the corrosion sample car by using flowing water and drying; measuring the expanding corrosion condition of the scratch of each part; measuring the weight loss of the corrosion standard sample plate, and calculating the corrosion load; measuring and recording the expanding corrosion conditions of the standard coating sample plate and the process coating sample plate; observing and recording the corrosion conditions of all parts of the vehicle body; and disassembling the automobile body, and observing and recording the corrosion condition of the inner cavity of the automobile body.
Description
Technical Field
The invention relates to the field of automobile corrosion resistance tests, in particular to an accelerated corrosion test method for an automobile body test cabin.
Background
The automobile body is an assembly with the largest volume of an automobile, and is comprehensively influenced by mechanical actions such as vibration and friction and climatic actions such as temperature, humidity and acid rain in the using process, so that corrosion defects such as rusty spots, cracking and falling are generated, and the appearance quality and the safety performance of the automobile are seriously influenced.
At present, in the domestic automobile industry, no accelerated corrosion test method for an automobile body exists, and in order to meet the development and verification requirements of a protection system of the automobile body, a whole automobile road reinforced corrosion test is generally adopted. The method has good correlation with the actual use state of the automobile, but needs to be carried out in a special test field after the whole automobile parts are completely developed. The test period is long, the cost is high, the test node is in the later stage of development of a new vehicle type, the corrosion resistance of a vehicle body is not improved and improved, and the bottleneck difficult to break through in product development is formed.
Disclosure of Invention
In view of the above, the invention provides an accelerated corrosion test method for a vehicle body test chamber.
The invention provides a vehicle body test cabin accelerated corrosion test method, which comprises the following steps: providing a test vehicle body, wherein the test vehicle body is a white vehicle body which completes welding and coating processes, and a vehicle door, a bonnet, a trunk cover and sealing parts are arranged on the white vehicle body; the method comprises the following steps of vehicle body test preparation, including cleaning and drying a vehicle body, measuring the thickness of a coating layer and the thickness of a base coating adhesive on the vehicle body, sealing a hole on the vehicle body, marking a defective part on the surface of the vehicle body, taking a picture, marking a metal matrix at a specific position of the vehicle body, and installing a corrosion standard sample plate or a standard coating sample plate and a process coating sample plate at the specific position of the vehicle body; performing a test, namely performing a vehicle body corrosion test by taking a specific time interval as a cycle, and performing a neutral salt spray test, a normal temperature test and a damp-heat test in each cycle; and (3) post-test treatment, wherein after the test is finished, the vehicle body is treated as follows: washing the corrosion sample car with flowing water and drying; measuring the expanding corrosion condition of the scratch of each part, and evaluating the corrosion degree of the corresponding part of the vehicle body; measuring the weight loss of the corrosion standard sample plate, and calculating the corrosion load; observing and recording the corrosion conditions of all parts of the vehicle body; and disassembling the automobile body, and observing and recording the corrosion condition of the inner cavity of the automobile body.
Further, the method further comprises: periodically observing the corrosion condition of each part of the vehicle body in the test process; periodically measuring the extended erosion of the scribing positions of all parts; and (5) periodically taking off part of the corrosion standard sample plate, measuring the weight loss, and calculating the corrosion load.
Further, the portions to be scribed when scribing the metal base body at the specific position of the vehicle body are a door, a side panel, a hood, a trunk lid, a ceiling, a skirt, a fender, and a bumper.
Further, the installation parts of the standard coating sample plate and the process coating sample plate are a ceiling, a trunk cover, a skirt edge, a fender, a bumper, an engine cover, a side wall and a trunk cover.
Further, the installation positions when the corrosion standard template is installed on the vehicle body are the upper part of the roof of the vehicle body and the skirt edge.
Further, the positions of the standard coating sample plate and the process coating sample plate installed on the vehicle body are the positions of a vehicle door, a side wall, a fender, a hood, a trunk cover, a skirt edge, a bumper and a ceiling.
Further, when the hole on the vehicle body is sealed, full sealing, half sealing or no sealing is carried out according to the area of the hole of the vehicle body after assembly.
Furthermore, holes with the area smaller than 1 square decimeter on the car body are sealed by a 3M film, and holes with the area larger than 1 square decimeter on the car window, the door inner plate and the car door are sealed by a high-barrier antirust film, a 3M adhesive tape and silane-based polyether sealant.
Further, a neutral salt spray test for 4 hours, an ordinary temperature test for 4 hours, and a wet heat test for 16 hours were performed per test cycle in accordance with GB/T10125-.
Further, the temperature in the normal temperature test was (23 ± 2) ° c, and the humidity was: 50% RH, the temperature at the damp heat test: at 40 ℃, humidity: 100% RH.
Further, the corrosion load calculation formula of the corrosion standard steel plate is as follows:
where h is the amount of corrosion of the material over the thickness, Δ m is the mass change of the template, ρ is the density of the metal, and A is the exposed area of the material.
The invention comprehensively considers the influence factors of the corrosion of the automobile body of the automobile, adopts a method with better contrast with the outdoor road corrosion test to carry out the accelerated corrosion test of the test cabin, and uses the body in white as the test vehicle, and can carry out related test verification in the initial stage of the automobile body development, thereby finding out the problems in time, providing enough improvement and improving time for the design of the anticorrosion performance of the automobile body, facilitating the rectification of the automobile body design, and solving the problems that the time node of the accelerated corrosion test in the existing automobile body development is back, the time is not enough to rectify the automobile body design, and the rectification cost is high due to the design locking.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understandable, the following specific preferred embodiments are described in detail.
Detailed Description
The accelerated corrosion test method for the vehicle body test chamber comprises the following steps:
the method comprises the following steps: the test vehicle body provided by the invention is a white vehicle body which completes welding and coating processes, and is provided with covering parts such as four doors, two covers (including a vehicle door, a bonnet and a trunk cover) and sealing parts such as sealing rubber strips, water cuts and plugs.
Step two: the test preparation, when the vehicle body is prepared for the test, mainly carries out the following work: firstly, cleaning and drying a vehicle body; measuring the thickness of the coating and the thickness of the prime coat adhesive on the vehicle body; marking the defective part on the surface of the vehicle body and taking a picture; scribing (one does not intersect horizontally and longitudinally) the metal matrix at the positions of a vehicle door, a side wall, a hood, a trunk cover, a ceiling, a skirt edge, a fender, a bumper and the like; sealing the holes on the vehicle body; installing a standard coating sample plate and a process coating sample plate on a ceiling, a trunk cover, a skirt edge, a fender, a bumper, an engine cover, a car door, a side wall and the like, and scribing (wherein the transverse and longitudinal lines do not intersect) on the standard coating sample plate and the process coating sample plate to a metal matrix; and installing corrosion standard templates above the roof and at the skirt of the car body (the sample hanging method and the corrosion measurement evaluation method of the standard templates refer to QC/T732).
When the holes in the vehicle body are sealed, full sealing, half sealing or no sealing is carried out according to the area of the holes in the vehicle body after assembly. Wherein the area is less than 1dm2The hole (square decimeter) is sealed by 3M film, the model of the 3M film is HS1002, and the area of the window and the door inner plate is more than 1dm2The holes are sealed by adopting a high-barrier antirust film, a 3M adhesive tape and MS glue (silane-based polyether sealant), the adopted high-barrier antirust film is an SF/VPF-Z-240 enhanced antirust film, the 3M adhesive tape is a PT1100 adhesive tape with the width of 10mm, and the MS glue is JS-920 (gray). The sealing area of the high-barrier antirust film, the 3M adhesive tape and the MS glue (silane-based polyether sealant) is more than 1dm2When the hole is formed, a circle of 3M adhesive tape is firstly coated around the hole, then a high-permeability anti-rust film is adhered, and finally, a silane-based polyether sealant is coated between the adhesive tape and the anti-rust film for sealing.
Step three, carrying out the test
In the test, 20 cycles were performed with one cycle every 24 hours. The following procedure is performed in each cycle: carrying out a neutral salt spray test for 4 hours according to GB/T10125-2012; secondly, executing a normal temperature test for 4 hours, wherein the temperature in the normal temperature test is as follows: (23 ± 2) ℃ and humidity: 50% RH; executing a damp-heat test for 16 hours, wherein the temperature in the damp-heat test is as follows: at 40 ℃, humidity: 100% RH.
After neutral salt spray and damp-heat tests, the front and rear elevation angles of the vehicle body are adjusted to 10 degrees, so that accumulated water on the plane part flows down. Also, the corrosion of the vehicle body needs to be checked periodically (for example, every cycle or every fixed cycle); periodically measuring the expanding corrosion condition of the scribed lines (including the scribed lines at the car door, the side wall, the engine hood, the trunk lid, the ceiling, the standard coating sample plate and the process coating sample plate) at each part (the aim is to compare the scribed lines at specific positions of the car body with the scribing expanding corrosion widths of the standard coating sample plate and the process coating sample plate and analyze the corrosion occurrence reason, for example, if the expanding corrosion width of the scribed lines at the skirt edge is greater than the expanding corrosion width of the standard coating sample plate installed at the skirt edge, the corrosion occurrence reason is not caused by the coating process but probably caused by the structure reason); and (3) periodically taking off part of the corrosion standard sample plate to measure the weight loss, and calculating the corrosion load (generally, taking one corrosion standard sample plate for measurement and calculation in one week, and measuring and calculating the last corrosion standard sample plate in the post-treatment stage of the test).
Step four, treatment after the test:
after the test is finished, the vehicle body needs to be treated as follows: firstly, washing a corrosion sample car by using flowing water and drying the corrosion sample car; measuring the expanding corrosion condition of each part at the scratch (mainly measuring the corrosion width of the scratch and evaluating the corrosion degree of the part of the vehicle body according to the corrosion width). Thirdly, calculating the corrosion load according to the weight loss of the corrosion standard steel plate; fourthly, observing and recording the corrosion condition of each part of the automobile body; disassembling the vehicle body, observing the corrosion condition of the inner cavity of the vehicle body and recording.
The corrosion standard steel plate corrosion load calculation method comprises the following steps:
where h is the amount of corrosion of the material over the thickness, Δ m is the mass change of the template, ρ is the density of the metal, and A is the exposed area of the material.
Fourth, evaluation
Each part was evaluated for grade according to the corrosion state of the vehicle body, and in this step, the corrosion grade was evaluated according to the 0-9 grade evaluation method described in QC/T732.
In conclusion, the invention comprehensively considers the influence factors of the corrosion of the vehicle body and adopts a method with better contrast with the outdoor road corrosion test to carry out the accelerated corrosion test of the test cabin. According to the method, a body-in-white is used as a test vehicle, relevant test verification can be carried out at the initial stage of vehicle body development, so that problems can be found in time, sufficient improvement and improvement time are provided for the design of the corrosion resistance of the vehicle body, the vehicle body design is convenient to modify, and the problems that in the existing vehicle type development, the time node of an accelerated corrosion test is backward, the vehicle body structure design and the corrosion resistance process are locked, and the vehicle body design is not provided with a chance to be modified but only parts can be modified are solved; in addition, the test period of the invention is short and the cost is low, compared with the whole vehicle road test, the test cost is only 1/5-1/4.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A vehicle body test chamber accelerated corrosion test method is characterized by comprising the following steps:
providing a test vehicle body, wherein the test vehicle body is a white vehicle body which completes welding and coating processes, and a vehicle door, a bonnet, a trunk cover and sealing parts are arranged on the white vehicle body;
the method comprises the following steps of (1) vehicle body test preparation, including cleaning and drying a vehicle body, measuring the thickness of a coating and the thickness of a primer on the vehicle body, marking a defective part on the surface of the vehicle body and taking a picture, marking a metal matrix at a specific position of the vehicle body, sealing a hole on the vehicle body, installing a corrosion standard sample plate at a first specific position of the vehicle body, or installing a standard coating sample plate and a process coating sample plate at a second specific position of the vehicle body, and marking lines on the standard coating sample plate and the process coating sample plate;
carrying out a test, namely carrying out a vehicle body corrosion test by taking a specific time interval as a cycle, executing a neutral salt spray test, a normal temperature test and a damp-heat test in each cycle, periodically measuring the corrosion expanding condition of the scribed line of each part, comparing the scribed line of the specific position of the vehicle body with the scribing line corrosion expanding width of a standard coating sample plate and a process coating sample plate, and analyzing the corrosion occurrence reason;
and (3) post-test treatment, wherein after the test is finished, the vehicle body is treated as follows: washing the corrosion sample car with flowing water and drying; measuring the corrosion width of the scratch of each part, and evaluating the corrosion degree of the corresponding part of the vehicle body according to the corrosion width; measuring the weight loss of the corrosion standard sample plate, and calculating the corrosion load according to the weight loss of the corrosion standard sample plate; observing the corrosion condition of each part of the automobile body, and taking a picture for recording; and disassembling the automobile body, observing the corrosion condition of the inner cavity of the automobile body and photographing records.
2. The accelerated corrosion test method of the vehicle body test chamber according to claim 1, characterized in that: the method further comprises: periodically observing the corrosion condition of each part of the vehicle body in the test process; and (5) periodically taking off part of the corrosion standard sample plate, measuring the weight loss, and calculating the corrosion load.
3. The accelerated corrosion test method of the vehicle body test chamber according to claim 1, characterized in that: the parts marked when the specific position of the vehicle body is marked to the metal matrix are a vehicle door, a side wall, a hood, a trunk cover, a ceiling, a skirt edge, a fender and a bumper.
4. The accelerated corrosion test method of the vehicle body test chamber according to claim 1, characterized in that: the positions for installing the corrosion standard template on the car body are above the roof of the car body and at the skirt edge.
5. The accelerated corrosion test method of the vehicle body test chamber according to claim 1, characterized in that: the positions of the standard coating sample plate and the process coating sample plate which are arranged on the automobile body are the positions of an automobile door, a side wall, a fender, an engine cover, a trunk cover, a skirt edge, a bumper and a ceiling.
6. The accelerated corrosion test method of the vehicle body test chamber according to claim 1, characterized in that: when the holes on the vehicle body are sealed, full sealing, half sealing or no sealing is carried out according to the area of the holes of the vehicle body after assembly.
7. The accelerated corrosion test method of the vehicle body test chamber according to claim 6, characterized in that: the holes with the area less than 1 square decimeter on the vehicle body are sealed by a 3M film, the holes with the area more than 1 square decimeter on the vehicle window, the door inner plate and the door inner plate are sealed by a high-barrier antirust film, a 3M adhesive tape and silane based polyether sealant.
8. The accelerated corrosion test method of the vehicle body test chamber according to claim 1, characterized in that: the neutral salt spray test for 4 hours, the normal temperature test for 4 hours and the damp heat test for 16 hours are carried out according to GB/T10125-2012 in each test cycle.
9. The accelerated corrosion testing method of the vehicle body test chamber according to claim 8, characterized in that: the temperature in the normal temperature test is (23 +/-2) DEG C, and the humidity is as follows: 50% RH, the temperature at the damp heat test: at 40 ℃, humidity: 100% RH.
10. The accelerated corrosion test method of the vehicle body test chamber according to claim 1, characterized in that: the corrosion load calculation formula of the corrosion standard steel plate is as follows:
where h is the amount of corrosion of the material over the thickness, Δ m is the mass change of the template, ρ is the density of the metal, and A is the exposed area of the material.
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| CN109569941A (en) * | 2017-09-28 | 2019-04-05 | 上海热策电子科技有限公司 | A kind of multiple spray system of white body accelerated corrosion experimental cabin |
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| CN112816399B (en) * | 2020-12-30 | 2023-06-20 | 盛明 | Standard sample for vehicle steel plate circulating salt spray corrosion test and preparation method thereof |
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| CN113866081B (en) * | 2021-09-28 | 2024-04-09 | 中国第一汽车股份有限公司 | Corrosion test evaluation method for automobile radiator |
| DE102021132401A1 (en) | 2021-12-09 | 2023-06-15 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Procedure for testing a vehicle component for corrosion attack points |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854126A (en) * | 2012-09-06 | 2013-01-02 | 浙江吉利汽车研究院有限公司杭州分公司 | Determination method for vehicle part service time |
| CN104749091A (en) * | 2015-04-27 | 2015-07-01 | 上海外高桥造船有限公司 | Testing method for corrosion resistant performance of high-temperature-resisting workshop primer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3678575B2 (en) * | 1998-02-20 | 2005-08-03 | 本田技研工業株式会社 | Test method for corrosion resistance of aluminum materials |
| CN206114491U (en) * | 2016-10-18 | 2017-04-19 | 上海热策电子科技有限公司 | White automobile body accelerated corrosion test cabin atomizing device of system |
-
2017
- 2017-05-22 CN CN201710365565.3A patent/CN107144524B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854126A (en) * | 2012-09-06 | 2013-01-02 | 浙江吉利汽车研究院有限公司杭州分公司 | Determination method for vehicle part service time |
| CN104749091A (en) * | 2015-04-27 | 2015-07-01 | 上海外高桥造船有限公司 | Testing method for corrosion resistant performance of high-temperature-resisting workshop primer |
Non-Patent Citations (1)
| Title |
|---|
| 不同类型车身涂层的耐候性及循环腐蚀测试结果比较;毛章卓 等;《上海涂料》;20170331;第55卷(第2期);第1.1-1.3节 * |
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