13 Aug Scope—The SAE J lab test procedure should be used when determining cosmetic corrosion performance for a particular coating system. 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 . 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.
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When run manually, the standard allows for the fact that test personnel may not be available during weekends. Immersion Method — test specimens immersed in the salt solution for a wae minute interval of each test cycle. 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.
The number of cycle repeats and therefore the test duration is variable. It is also used elsewhere in the world where these auto companies have satellite manufacturing facilities, or joint collaborative ventures with other auto manufacturers.
Then, assuming that they are actually improvements, they will revise the standard eae submit it to SAE.
Salt spray test
Another difference between the conditions in a salt spray test and real-world conditions is the salt concentration.
This is considered an out of date browser. This group strived to develop the knowledge of corrosion mechanisms and their replication in a controlled environment until, nearly 20 years later and after considering over available laboratory, proving ground, and outdoor corrosion tests, the SAE Surface Vehicle Standard, J Cosmetic Corrosion Lab Test, was published in June The industry required u2334 more predictive method of testing which would allow component performance to be addressed before field trials and product releases.
Test Conditions Test specimens are placed in an enclosed chamber and exposed to a changing climate that comprises of the following 3 part repeating cycle.
Other differences include the temperature changes that occur in the real world and the fact that real-world conditions include salts other than NaCl. For the specimens a minimum sse 6, each sized In one test, they mounted panels of the standard materials on pickup trucks driven in Montreal, Quebec, and St.
Test method SAE J2334
Contact Ascott for Further Information. Test specimens are placed in an enclosed chamber and exposed to a changing climate that comprises of the following 3 part repeating cycle. Website design by Peter Bourne Communications. One of the first steps was to develop a set of standard materials that the researchers could use to 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.
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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. Please note The test standard summaries are for general guidance only. There are 2j334 problems with ASTM B salt spray test when trying to rank the corrosion performance of automotive parts. They drove the trucks for five years and then measured the corrosion performance of the materials.
Spray Method — periodic or continuous direct impingement spray of the salt solution over the 15 minute interval that ensures that the test specimens are kept wet for the entire 15 minute interval. When running the test automatically, you do not need the extended dry stage.
SAE J | Standards | Ascott Analytical
This website has been developed with modern browsers in mind to sea it to display at its best in a wide variety of viewing situations – including mobile viewing. The development of SAE J was time consuming, but thorough.
When this is the case, you extend the dry stage over the weekend. Several studies have se 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.
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. To determine the real-world performance of these materials, researchers then ran a series of tests.
But we haven’t supported older browsers like IE8. 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. These differences can lead to differences in test results.
Though believed to be accurate at the time of writing, this may change over time.