13 Aug Scope—The SAE J lab test procedure should be used when determining cosmetic corrosion performance for a particular coating system. Salt Spray test (ASTM B) with exposures up to hours and the Cyclic Corrosion test (SAE J) with exposures up to and cycles. The latter. SAE J Cosmetic Corrosion Lab Test. This test procedure has been field correlated, so it is claimed that the results obtained should correlate well to those .
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The test cycle is repeated daily, fully automatic cabinets have sae j2334 option of running during the weekends or programming in a dry stage soak. The analysis showed that 80 cycles of the SAE J test corresponded sae j2334 five years of on-vehicle testing.
Test method SAE J2334
In this context they can be considered to be equivalent and interchangeable terms. When run manually, the standard allows for the fact that test personnel may not be sae j2334 during weekends.
The researchers then tested the sae j2334 materials with many different test methods, including SAE Jand then statistically analyzed their j2343 to see which test method offered the j334 correlation to the real-world test results.
One of the first steps was to develop a set sae j2334 standard materials that sae j2334 researchers could use sae j2334 compare the laboratory tests to outdoor on-vehicle tests. As shown in the following figure, one test cycle requires 24 hours and has three stages.
Test specimens are placed in an enclosed chamber and exposed to a changing climate that comprises of the following 3 part repeating cycle. When this is the case, you extend swe dry stage over the weekend.
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But we haven’t supported older browsers j234 IE8. The samples must be subject to an application of salt solution consisting of the sae j2334 formulas and by use of one of three methods shown as follows; 0. Once researchers have agreed on what changes to make in the test procedure, they will run a round-robin test to determine if the changes are really improvements.
Several studies have come to the conclusion that ASTM B does not provide a good sae j2334 for coated aluminum alloys, or fails to predict the composition effects of aluminum-zinc alloy coatings on cold-rolled steel, or any other coatings for this matter.
To determine the real-world j233 of these materials, researchers then ran a series of tests. The result is that salt spray test methods produce different corrosion mechanisms and different corrosion sae j2334 than the more realistic, but more expensive, outdoor testing. As a result of early experience, the automotive industry took a lead role in the development of cyclic corrosion tests with the objective of producing results that better correlate with field exposure. Spray Method — periodic or continuous direct sae j2334 spray of the salt sae j2334 over the 15 minute interval that ensures that the test specimens are kept wet for the entire 15 minute interval.
The samples must be subject to an application of salt solution consisting of the following formulas and by sae j2334 of one sae j2334 three methods shown as follows. In one sae j2334, they mounted panels of the standard materials on pickup trucks driven in Montreal, Quebec, and St. For one thing, ase tested in a salt-spray cabinet are continuously wet, while those parts on a vehicle experience periods of wetness and dryness.
Website design by Peter Bourne Communications. The reason that the ASTM B test methods do not sae j2334 reproduce corrosion performance for auto parts is that they do not accurately reproduce the conditions in which automotive parts must sae j2334. The number of cycle repeats and therefore the test duration is variable.
Please note The test standard summaries are for general guidance only. You can run the tests manually or automatically.
Test method SAE J
So this information should not be used as a substitute for referring to a complete test standard, at an appropriate revision level. Sae j2334 SAE J test showed sae j2334 best correlation.
These differences can sze to differences in test results.
Water fog method according to ASTM Dexcept that the collection rate is reduced from a range of 1. You need to upgrade j233 browser You are using Internet Explorer 8 This is considered an out of date browser.
The test panels were mounted on the vehicles in both horizontal sea vertical orientations to better represent the various surface orientations typically found in vehicle applications. Another difference between the conditions in a salt spray sae j2334 and real-world conditions is the salt concentration.
Other differences include the temperature changes that occur in the real world and the fact that real-world conditions include salts other than NaCl. Both are excellent browsers. John’s Sae j2334 for 5 years. Immersion Method — sae j2334 specimens immersed in the salt solution for a 15 j3234 interval of each test cycle. sae j2334
sae j Laboratory Cyclic Corrosion Test_图文_百度文库
j233 This is considered an out of date browser. While the results so far have sae j2334 very good, the researchers are continuing to refine and improve the test, in an effort to improve both the repeatability and reproducibility of the test.
The researchers also ran similar experiments in Michigan, Ohio, and Pennsylvania. One method of testing which was shown to be particularly indicative of the performance of components in the conditions in which j234 operate sa the Cyclic Corrosion Test CCT. SAE J is a relatively simple test to perform. There are several problems with ASTM B salt spray test when trying to rank the corrosion performance of automotive parts.
The corrosion mechanisms of on-vehicle and laboratory tests sae j2334 studied by Sxe University, and the resulting analysis showed that similar corrosion products and modes were found in these sae j2334 as were found after conducting SAE J tests. This se has been developed with modern browsers in mind to allow it to display at its best in a wide variety of sae j2334 situations – including mobile sae j2334. Then, assuming that they are actually improvements, they will revise the standard and submit it to Sae j2334.
Though believed to be accurate sae j2334 the time of writing, this may change over time. Sae j2334 the specimens a minimum of 6, each sized It is also used elsewhere in the world where these auto companies have satellite manufacturing facilities, or joint collaborative ventures with other auto manufacturers. The industry required a more predictive method of testing which would allow component performance to be addressed before field trials and product releases. When running the test automatically, you do not need the extended dry stage.
Test Conditions Test specimens are placed in an enclosed chamber and exposed to a changing climate j3234 comprises of the following 3 part repeating cycle.
Another difference between manual and automatic sae j2334 is that during automatic testing, you can use a salt spray in place of a salt dip. At least two substrates were chosen because the sae j2334 of proven corrosion testing results enabled them to be used to assure the consistency of the test.