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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The development of SAE J was time consuming, but thorough. When run manually, the standard allows for the fact that test personnel may not be available during weekends.
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. Immersion Method — test specimens immersed in the salt solution for a 15 minute interval of each test cycle.
Salt spray test
It is also used elsewhere in the world where these auto companies have satellite manufacturing facilities, or joint collaborative ventures with other auto manufacturers. Researchers are also working on improving the method for salt application.
The analysis showed that 80 cycles of the SAE J test corresponded to five years of on-vehicle testing. The corrosion mechanisms of on-vehicle and laboratory tests were studied by Lehigh University, and the resulting analysis showed that similar corrosion products and modes were found in these tests as were found after conducting SAE J tests. As shown in the following figure, one test cycle requires 24 hours and has three stages.
The SAE J test showed the best correlation. 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.
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.
Contact Ascott for Further Information. The industry required a more predictive method of testing which would allow component performance to be addressed before field trials and product releases. But we haven’t supported older browsers like IE8.
The researchers then tested the standard materials with many different test methods, including SAE Jand then statistically analyzed their results to see which test method offered the best correlation to the real-world test results. Another difference between the conditions in a salt spray test and real-world conditions is the salt concentration.
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To determine the real-world performance of these materials, researchers then ran a series of tests. The number of cycle repeats and therefore the test duration is variable. 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 mobile viewing.
Sea researchers also ran similar experiments in Michigan, Ohio, and Pennsylvania. The test panels were k2334 on the vehicles in both horizontal and vertical orientations to better represent the various surface orientations typically found in vehicle applications. Other differences include the temperature changes that occur in the real world and the fact that real-world conditions include salts other than NaCl. When this is the case, you extend the dry stage over the weekend.
In one test, they mounted panels of the standard materials on pickup trucks driven in Montreal, Quebec, and St. Website design by Peter Bourne Communications.
SAE J | Standards | Ascott Analytical
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 and reproducibility of the test. They drove the trucks for five years and then measured the corrosion performance of the jj2334. In this context they can be considered to be equivalent and interchangeable terms. 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 You need to upgrade your browser You are using Internet Explorer 8 This m2334 considered an out of date browser.
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.
For the specimens a minimum of 6, each sized These differences can lead to differences in test results. Another difference between manual and automatic tests is that during automatic testing, you can use a salt spray in place of a salt dip.
There are several problems with ASTM B salt spray test when trying to rank the corrosion performance of automotive parts.
So this information should not be used as a substitute for referring to a complete test standard, at an appropriate revision level. Water fog method according to ASTM Dexcept that the collection rate is reduced from a range of 1. SAE J is a relatively simple test to perform. Then, assuming that they are se improvements, they will revise the standard and submit it to SAE.
Test specimens are placed in an enclosed chamber and exposed to a changing climate that comprises of the following 3 part repeating cycle. 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.
The samples must j22334 subject to an application of salt solution consisting of the following formulas and by use of one of three methods shown as follows; 0.