GB2468390A - Method for testing the corrosion resistance of a motor vehicle - Google Patents
Method for testing the corrosion resistance of a motor vehicle Download PDFInfo
- Publication number
- GB2468390A GB2468390A GB1002723A GB201002723A GB2468390A GB 2468390 A GB2468390 A GB 2468390A GB 1002723 A GB1002723 A GB 1002723A GB 201002723 A GB201002723 A GB 201002723A GB 2468390 A GB2468390 A GB 2468390A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relative humidity
- temperature
- hours
- vehicle
- increased
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 79
- 238000012360 testing method Methods 0.000 title claims abstract description 23
- 230000007797 corrosion Effects 0.000 title claims abstract description 13
- 238000005260 corrosion Methods 0.000 title claims abstract description 13
- 239000012266 salt solution Substances 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 238000005507 spraying Methods 0.000 claims abstract description 12
- 230000003247 decreasing effect Effects 0.000 claims abstract description 11
- 150000003839 salts Chemical class 0.000 claims abstract description 11
- 230000008014 freezing Effects 0.000 claims description 14
- 238000007710 freezing Methods 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000010998 test method Methods 0.000 claims 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/002—Test chambers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Environmental & Geological Engineering (AREA)
- Environmental Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The method for testing the corrosion resistance of a motor vehicle comprises the motor vehicle being exposed to the following method steps:a. passage through a basin filled with salt solution, and spraying, in particular salt spraying,b. action of salt solution and sprayed-on liquid for the duration of several hours,c. halting in a climate chamber, with, at decreasing relative humidity, the temperature being kept constant, and subsequently the temperature and relative humidity being increased. The method makes it possible to test the corrosion resistance of the vehicle in a sustainable and near-realistic manner. By means of the method, climatic zones or climatic journeys, for example the tropics or winter months in moderate climatic zones, can be simulated.
Description
Method for testing the corrosion resistance of a motor vehicle The invention relates to a method for testing the corrosion resistance of a motor vehicle.
The object of the present invention seeks to specify a method by means of which the corrosion resistance of a vehicle can be tested in a sustainable and near-realistic manner.
The invention proposes a method for testing the corrosion resistance of a motor vehicle, the motor vehicle being exposed to the following method steps: a. passage through a basin filled with salt solution, and spraying, in particular salt spraying, b. action of salt solution and sprayed-on liquid for a duration of several hours, c. halting in a climate chamber, with, at decreasing relative humidity, the temperature being kept constant, and subsequently the temperature and the relative humidity being increased.
Passage through the salt basin and spraying ensures that the vehicle comes intensively into contact with the salt solution and the sprayed-on liquid. The salt solution may in this case consist of a l-5 sodium chloride solution or of a mixed salt solution with calcium chloride additives. The action of salt solution and liquid for a duration of several hours during driving ensures that the salt solution and liquid can pass in a sustainable manner even into not readily accessible regions, such as gaps, slits or cavities of the vehicle.
chamber arid exposed there to different humidity conditions and temperatures. With a decrease in relative humidity and a temperature which is kept constant, a daily profile in moderate climatic zones is simulated, while the subsequent increase in temperature and relative humidity simulates a tropical climate. This method sequence described may be repeated, preferably lasting for a cycle of 24 hours.
In particular, after passage through the salt basin and spraying, the action of salt solution and liquid for a duration of several hours takes place during a test run of the vehicle on a test strip. During this test run of the vehicle, in which the vehicle is subjected to dynamic and thermal stress on account of its operation, the salt solution and the sprayed-on liquid can act upon the vehicle in a particularly sustainable manner.
The action of salt solution and liquid before driving advantageously takes place over a lengthy period of time, for example of at least 5 hours. it action takes place over a period of time of 5 hours, and there is provision for starting the cycle once more after 24 hours, the vehicle is halted in the climate chamber for the remaining period of time of the day, hence for 19 hours.
In the climate chamber, the moderate climatic zones are simulated over a longer time span than the tropical climate.
To that extent, with a view to simulating the moderate climatic zones, it is considered advantageous if, with the relative humidity decreasing, the temperature is kept constant for 15 hours. In particular1 with the relative humidity decreasing, the temperature can be kept constant at 45°C and, in the case of a constant temperature1 the relative humidity can be lowered from 95% to 50%. IrrespectiVe of the actual values or of the respective duration, in embodiments it is important that the relative humidity is varied during a test run. In a preferred method sequence, the relative humidity is partially lowered in each case after 1 or 2 hours. The humidity decrease thus takes place in a controlled manner, not abruptly.
When the temperature and relative humidity are subsequently increased in order to simulate a tropical climate, there is preferably provisiOn f or the temperature and relative humidity to be increased over 4 hours. In particular1 with increased relative humidity, the increased temperature amounts to 48°C to 50°C, and, with an increased temperature, the increased relative humidity amounts to 95%.
The method steps referred tO above, to be precise passage through the salt basin and spraying, the action of salt solution and sprayed-On liquid, in particular during a test run on a test strip and halting in a climate chamber with a simulation of the moderate climatic zones and of the tropical climate, preferably involve a method duration of 24 hours.
According to an advantageous method sequence, this 24-hour method cycle may be repeated several times, preferably being repeated four times, so that an overall duration of 120 hours is obtained.
According to a particular refinement to the method according to the invention, there is provision f or exposing the vehicle to a freezing phase before, after or between the multiple method cycle, in particular the respective 24-hour method cycle. For example, the vehicle may be exposed to the freezing phase for 48 hours. The temperature during the freezing phase should in this case be equal to or lower than 200C. Before the commencement of the multiple method cycle according to the invention, the cooled vehicle is subjected, in particular, to one-hour or two-hour heating, in particular to a climate chamber temperature of 20°C. The relative humidity during this heating amounts particularly to 50&.
The method described, together with its development, makes it possible to have a test which is suitable for mixed types of construction, since it simulates the climate from outside according to the daily profile. Moreover, by means of the test, the corrosion processes on the vehicle, which result from a moderate temperature rise or from a controlled decrease and increase in relative humidity, can be copied in an accelerated manner. For example, morning thawing, drying-of f towards midday, the humid conditiOnS in the tropics and the freezing phases in the winter months are simulated. Since most previous endurance runs involve only abrupt jumps in relative humidity from 50 to ioo, and vice versa, not all the corrosion processes observed in the field under customer operating conditions are copied. The method according to the invention ensures this.
Further features of the invention may be gathered from the subclaitnS, the following description of the drawing and the drawing itself.
A preferred exemplary embodiment of the method according to the invention is illustrated in the drawing and is explained in more detail in the following description. In the drawing: Fig. 1 shows the profile of relative humidity and temperature for a 24-hour cycle of the method according to the invention, Fig. 2 shows a test profile taking place over a week, with a 48-hour freezing phase and five following, in each case 24-hour method cycles according to Fig. 1, illustrated only for the first of the five method cycles, f or the profile of relative humidity and temperature.
By means of the method, climatic zones or climatic phases, for example the tropics or winter months in moderate climatic zones, are simulated. Furthermore, the profile of daytime relative humidity is simulated. The climatic cycle illustrated extends over a week.
Fig. 1 shows one day in the climatic cycle, which is repeated four times according to the illustration in Fig. 1. The first days of the climatic cycle are thus illustrated.
After passage through a salt basin and spraying according to region A, the motor vehicle executes for 5 hours a test run on a test strip according to region B. Subsequently, the vehicle is halted for 19 hours in a climate chamber according to region C. In this climate chamber, with the relative humidity decreasing in a controlled manner, the temperature is first kept constant for 15 hours, this corresponding, according to region D, to the daily profile in moderate climatic zones. Subsequently, according to region E, the temperature and relative humidity are increased in a controlled manner in order to simulate a tropical climate.
After 24 hours, hence at the time point F, the sequence starts from the beginning, followed four times by the method sequences A, B and C, the latter covering the regions D and E. For the simulation of arctic climatic zones, the vehicle is exposed, for example, to a 48-hour freezing phase according to region G after 5 days, as shown in Fig. 1. SubsequentlY, after one-hour heating according to region i-I, the vehicle is subjected to the next 5-day cycle according to Fig. 1, Fig. 2 again illustrating only one cycle day following the two-day freezing phase. The identical 5-day cycle is followed once again by the two-day freezing phase.
Claims (13)
- Claims 1. Method for testing the corrosion resistance of a motor vehicle, the motor vehicle being exposed to the following method steps: a. passage through a basin filled with salt solution, and spraying, in particular salt spraying, b. action of salt solution and sprayed-on liquid for a duration of several hours, c. halting in a climate chamber, with, at decreasing relative humidity, the temperature being kept constant, and subseqUentlY the temperature and relative humidity being increased in a controlled manner.
- 2. Method according to Claim 1, in which, after passage through the salt basin and spraying1 the action of salt solution and liquid for a duration of several hours takes place during a test run of the vehicle on a test strip.
- 3. Method according to Claim 1 or 2, in which the action of salt solution and liquid takes place over 5 hours.
- 4. Method according to one of Claims 1 to 3, in which the vehicle is halted in the climate chamber for 19 hours.
- 5. Method according to one of Claims 1 to 4, in which, with the relative humidity decreasing in a controlled manner, the temperature is kept constant for is hours.
- 6. Method according to one of Claims 1 to 5, in which, with the relative humidity decreasing in a controlled manner, the temperature is kept constant at 45°C.
- 7. Method according to one of Claims 1 to 6, in which, in the case of a constant temperature, the relative humidity is lowered from 95% to 50%.
- 8. Method according to Claim 7, in which the relative humidity is partially lowered in each case after 1 or 2 hours.
- 9. Method according to one of Claims 1 to 8, in which the temperature and relative humidity are increased over 4 hours.io. Method according to one of Claims 1 to 9, in which, with increased relative humidity, the increased temperature amounts to 48°C to 50°C.ii. Method according to one of Claims 1 to 10, in which, with an increased temperaturei the increased relative humidity amounts to 95%.12. Method according to one of Claims 1 to 11, in which the method duration of method steps a. to c. amounts to 24 hours.13. Method according to one of Claims 1 to 12, in which the method cycle formed from the method steps a. to c. is repeated several times, in particular four times.14. Method according to Claim 13, in which the vehicle is exposed to a freezing phase before, after or between the multiple method cycle in the climate chamber.15. Method according to Claim 14, in which the vehicle is exposed to the freezing phase for 48 hours.16. Method according to Claim 14 or 15, in which the temperature during the freezing phase amounts to -20°C.17. Method according to one of Claims 14 to 16, in which, before the commencement of the multiple method cycle, the cooled vehicle is subjected to one-hour heating, in particular at a temperature of the climate chamber of 20°C.18. Method according to Claim 17, in which the relative humidity during action upon the cooled vehicle amounts to 0 u 0.19. A method for testing the corrosion resistance of a motor vehicle, substantially as hereinbefore described with reference to any of the accompanying drawings.-AMENDMENTS TO THE CLAIMS HAVE BEEN FILED AS FOLLOWS1. Method of testing the corrosion resistance of a motor vehicle, the motor vehicle being exposed to the following method steps: a. passage through a basin filled with salt solution and salt spraying; b. after the passage through the salt basin and the spraying, the action of salt solution and sprayed-on salt for a duration of at least S hours, which takes place during a test run of the vehicle on a test strip; and c. halting in a climate chamber, with, at decreasing relative humidity, the temperature being kept constant, and subsequently the temperature and relative humidity being increased in a controlled manner.2. Method according to Claim 1, in which the action of salt solution and liquid takes place over 5 hours.3. Method according to one of Claims 1 or 2, in which the * vehicle is halted in the climate chamber for 19 hours. ***S. * *: ** 4. Method according to one of Claims 1 to 3, in which, with **** the relative humidity decreasing in a controlled manner, I..the temperature is kept constant for 15 hours.S **..5. Method according to one of Claims 1 to 4, in which, with the relative humidity decreasing in a controlled manner, the temperature is kept constant at 45°C.6. Method according to one of Claims 1 to 5, in which, while the constant temperature is maintained, the relative humidity is lowered from 95 to 50.7. Method according to Claim 6, in which the relative humidity is partially lowered after 1 or 2 hours.8. Method according to one of Claims 1 to 7, in which the temperature and relative humidity are increased over 4 hours.9.Method according to one of Claims 1 to 8, in which, with increased relative humidity, the temperature is increased to 48°C to 50°C.
- l0.Method according to one of Claims 1 to 9, in which, with an increased temperature, the increased relative humidity amounts to 9S.
- ll.Method according to one of Claims 1 to 10, in which the method duration of method steps a. to c. amounts to 24 hours. * �.* * * S...
- l2.Method according to one of Claims 1 to 11, in which the : ** method cycle formed from the method steps a. to c. is S...* repeated several times, in particular four times. **. * ..**..:
- l3.Method according to Claim 12, in which the vehicle is *:*. exposed to a freezing phase before, after or between a multiple method cycle in the climate chamber. * a14. Method according to Claim 13, in which the vehicle is exposed to the freezing phase for 48 hours.15.Method according to Claim 13 or 14, in which the temperature during the freezing phase amounts to -20°C.16.Method according to one of Claims 13 to 15, in which, before the commencement of the multiple method cycle, the cooled vehicle is subjected to one-hour heating, in particular at a temperature of the climate chamber of 200C.17.Method according to Claim 16, in which the relative humidity during heating action upon the cooled vehicle amounts to 50.18.A method of testing the corrosion resistance of a motor vehicle, substantially as hereinbefore described with reference to any of the accompanying drawings. a* * * **** * * * ** * * a * * * a.. *.I' * a * S.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009012259.1A DE102009012259B4 (en) | 2009-03-07 | 2009-03-07 | Method for testing a motor vehicle for its corrosion resistance |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB201002723D0 GB201002723D0 (en) | 2010-04-07 |
| GB2468390A true GB2468390A (en) | 2010-09-08 |
| GB2468390B GB2468390B (en) | 2012-05-23 |
Family
ID=42113977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1002723.3A Expired - Fee Related GB2468390B (en) | 2009-03-07 | 2010-02-17 | Method for testing the corrosion resistance of a motor vehicle |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE102009012259B4 (en) |
| GB (1) | GB2468390B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150224854A1 (en) | 2012-08-24 | 2015-08-13 | Hans-Willi Müller | Apparatus for Adjusting the Humidity in an at Least Partially Enclosed Interior Zone, Arrangement for Performing Ageing Tests on Products, and Method for Artificially Humidifying a Test Chamber Exposed to the Weather |
| CN112240865B (en) * | 2019-07-19 | 2024-01-23 | 上海沃尔沃汽车研发有限公司 | Corrosion test equipment and method for large system-level parts of vehicle |
| CN111077061A (en) * | 2019-11-20 | 2020-04-28 | 一汽-大众汽车有限公司 | Climate alternation test method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5720643A (en) * | 1980-07-11 | 1982-02-03 | Mazda Motor Corp | Corrosion resistant tester for automobile |
| JPS57191534A (en) * | 1981-05-21 | 1982-11-25 | Nippon Denso Co Ltd | Durability testing device |
| US4794804A (en) * | 1987-02-19 | 1989-01-03 | Kabushiki-Kaisha Toyo Seisakusho | Salt damage environmental testing chamber for self-propelled vehicles |
| JPH11237330A (en) * | 1998-02-20 | 1999-08-31 | Honda Motor Co Ltd | Method for testing corrosion resistance of aluminum material |
| DE10010250A1 (en) * | 2000-03-02 | 2001-09-06 | Volkswagen Ag | Device to produce a salt mist used in salt testing chambers for testing the corrosion resistance of automobile prototypes comprises a pressurized air feed line, a suction line, an atomizing nozzle, and a moistening unit |
| US20030046048A1 (en) * | 2001-09-06 | 2003-03-06 | Xiaoyuan Chang | Method of simulating environmental exposure |
| DE10155245A1 (en) * | 2001-11-09 | 2003-05-28 | Audi Ag | Weather simulation device for testing motor vehicles has a weather chamber with an airflow created from the top to the bottom of the testing space that results in an even temperature distribution closely matching real conditions |
| FR2892513A1 (en) * | 2005-10-26 | 2007-04-27 | Renault Sas | Climatic variation simulation installation for testing e.g. corrosion resistance of motor vehicle, has transfer unit transferring diurnal and nocturnal simulation devices between simulation cabins for vehicles to be tested |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10331474A1 (en) * | 2003-07-08 | 2005-01-27 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Vehicle component corrosion simulation method in which a component under test is placed in a test chamber that is used to simulate the engine space and a programmable controller used to control environmental test conditions |
-
2009
- 2009-03-07 DE DE102009012259.1A patent/DE102009012259B4/en not_active Expired - Fee Related
-
2010
- 2010-02-17 GB GB1002723.3A patent/GB2468390B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5720643A (en) * | 1980-07-11 | 1982-02-03 | Mazda Motor Corp | Corrosion resistant tester for automobile |
| JPS57191534A (en) * | 1981-05-21 | 1982-11-25 | Nippon Denso Co Ltd | Durability testing device |
| US4794804A (en) * | 1987-02-19 | 1989-01-03 | Kabushiki-Kaisha Toyo Seisakusho | Salt damage environmental testing chamber for self-propelled vehicles |
| JPH11237330A (en) * | 1998-02-20 | 1999-08-31 | Honda Motor Co Ltd | Method for testing corrosion resistance of aluminum material |
| DE10010250A1 (en) * | 2000-03-02 | 2001-09-06 | Volkswagen Ag | Device to produce a salt mist used in salt testing chambers for testing the corrosion resistance of automobile prototypes comprises a pressurized air feed line, a suction line, an atomizing nozzle, and a moistening unit |
| US20030046048A1 (en) * | 2001-09-06 | 2003-03-06 | Xiaoyuan Chang | Method of simulating environmental exposure |
| DE10155245A1 (en) * | 2001-11-09 | 2003-05-28 | Audi Ag | Weather simulation device for testing motor vehicles has a weather chamber with an airflow created from the top to the bottom of the testing space that results in an even temperature distribution closely matching real conditions |
| FR2892513A1 (en) * | 2005-10-26 | 2007-04-27 | Renault Sas | Climatic variation simulation installation for testing e.g. corrosion resistance of motor vehicle, has transfer unit transferring diurnal and nocturnal simulation devices between simulation cabins for vehicles to be tested |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102009012259A1 (en) | 2010-09-09 |
| DE102009012259B4 (en) | 2018-02-01 |
| GB201002723D0 (en) | 2010-04-07 |
| GB2468390B (en) | 2012-05-23 |
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Legal Events
| Date | Code | Title | Description |
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| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) |
Free format text: REGISTERED BETWEEN 20110310 AND 20110316 |
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| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) |
Free format text: REGISTERED BETWEEN 20110331 AND 20110406 |
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| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20200217 |