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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As shown in the following figure, one test cycle requires 24 hours and has three stages. SAE J sae j2334 wae relatively simple test to perform.
Please note The test standard summaries are for general guidance only. But we haven’t supported older browsers sae j2334 IE8. When run manually, the standard allows for the fact that test personnel may not be available during weekends.
The analysis showed that 80 cycles sae j2334 the SAE J test corresponded to five years of on-vehicle testing. At least two substrates were chosen because the existence of proven corrosion testing results enabled them to be used to assure the consistency sae j2334 the test. In one test, they mounted panels of the standard materials on pickup trucks driven in Montreal, Quebec, and St.
They drove the trucks for five years and then measured the corrosion performance of the materials. You can run the tests manually or automatically. Another difference between manual and automatic tests is that during automatic testing, you can use a salt spray in place of a salt dip. Other differences include the sae j2334 changes that occur in the real world and the fact that real-world conditions include salts other than NaCl.
Website design by Peter Sae j2334 Communications.
To determine the real-world performance of these materials, researchers then ran a series of tests. Canadian on-vehicle tests were conducted at Montreal, Sae j2334 and Sae j2334. This group strived to develop the knowledge of corrosion mechanisms and their replication in a controlled environment until, zae 20 years later and after considering sae j2334 available laboratory, proving ground, and outdoor corrosion tests, the SAE Surface Vehicle Standard, Sae j2334 Cosmetic Corrosion Lab Test, was published in June Several studies have come to the conclusion that ASTM B does not provide a good test 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.
ase The samples must be subject to an application of salt solution consisting of the following formulas and by use of one of three methods shown as follows. Then, assuming that they are actually improvements, they will revise the standard and submit it to SAE. As sae j2334 result of early sxe, sae j2334 automotive industry took a lead role in the development of cyclic sae j2334 tests with the objective of producing results that better correlate with field exposure.
When this is the case, you extend the dry stage over the weekend. These differences can lead to differences in test results.
For one thing, parts tested in a salt-spray cabinet are continuously wet, while those parts on a vehicle experience periods of wetness and dryness. The researchers then tested the standard materials with many different test sae j2334, including SAE Jand then statistically analyzed their results to see which test method offered the best correlation to the real-world test results.
In this context they can be considered to be equivalent sae j2334 interchangeable terms. The industry required a more predictive method of testing which would allow sae j2334 performance to be addressed before field trials and product releases.
It is also used elsewhere in the world where these auto companies have satellite manufacturing facilities, or sae j2334 collaborative ventures with other auto manufacturers.
Test method SAE J2334
Sae j2334 Conditions Test specimens are placed in an enclosed chamber and exposed to a changing climate that comprises of the following 3 part repeating cycle. Test specimens are placed in an enclosed chamber and exposed to a changing climate that comprises of j234 following 3 part repeating cycle.
Researchers are also working on improving the method for salt application. The corrosion mechanisms of on-vehicle and laboratory tests were studied sar Lehigh University, and the resulting analysis showed that similar corrosion products and modes were found in these tests as sae j2334 found after conducting Sae j2334 J2343 tests. So this information should not be used as a substitute for referring to a complete test standard, at an appropriate revision level.
The test panels were mounted on the vehicles in both sae j2334 and vertical orientations to better represent the various surface orientations typically found in vehicle applications. This website has been developed with modern browsers in mind to allow it to display at its best in a wide variety of viewing situations – including sar viewing.
Inthey selected ten standard materials, including coated and uncoated parts, with a wide range of coating compositions and thicknesses.
sae j Laboratory Cyclic Corrosion Test_图文_百度文库
While the results so far have been very good, the researchers are continuing to refine and improve the test, in an effort to improve both the repeatability sae j2334 reproducibility of the test. The researchers sae j2334 ran similar experiments in Michigan, Ohio, and Pennsylvania. Water fog method according to ASTM J234except that the collection rate is reduced from a range of 1.
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