ASTM B The ASTM B Copper-Accelerated Acetic Acid Salt Spray, ( CASS) Test This test is performed in accordance with the specifications found in the. ASTM B Copper Accelerated Acetic Acid Salt Spray (Fog) Testing. Can be used to test the relative resistance to corrosion of anodized aluminium and. Testing Specifications of Cyclic Cycles we have met – ASTM, ASTM B, ASTM B, CASS, ASTM G85, GMW, GMW, SAE J, Ford CETP.
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Test time ranges from 24 to thousands of hours, usually in 24 hour increments.
It is also applicable to the testing of anodized aluminum. That said, you generally cannot correlate astj tests to tests such as NSS for numerous reasons. Medias this blog was made to help people to easily download or read PDF files.
That is, put some parts in neutral salt spray and some in CASS and see what you get. To minimize your searching efforts and to offer multiple viewpoints, we’ve combined some threads into the dialog you’re viewing.
It will give you a different corrosion mechanism. What is organic coating?
CASS Test — Copper-Accelerated Acetic Acid Salt Spray (Fog) Test — (ASTM B368, B117)
Touchstone has laboratory tested both coupons and entire components for automotive, aerospace, and other industries. An ongoing discussion from through B36 1 — The following standards are not requirements. Historical Version s – view previous versions of standard. One of the reasons predictive correlation of accelerated corrosion testing to real life is problematic is that the corrosion mechanisms are fundamentally different.
How to compare ASTM B117 Salt Spray and ASTM B368 CASS Test?
Are these parts stainless steel, or a non-ferrous alloy perhaps? First a side note about CASS. It is also used for testing chromium plating on zinc and steel die castings. It is also used for testing chromium plating on zinc and steel die castings. They are referenced for information only: There is no simple bb or factor to convert asrm test to another. Inorganic coatings are coatings that don’t contain significant amounts of organic chemicals.
For more specific safety precautionary information see 8. Should we consider that a failure? Ray Kremer Stellar Solutions, Inc. An ongoing discussion from through Among the tests offered are: For example, hot dip galvanizing is no doubt the most durable of any finish, often surviving on electrical transmission towers for 75 years or more with no maintenance. Most paints and powder coatings would be organic coatings. You appear to be acknowledging that there is no correlation, but then asking whether the correlation would be It was a blast from the past hearing from you: Astn you’re trying to mimic some field failure, you’re talking completely different corrosion mechanisms Some automotive fuel components have this type of plating and CASS 3b68.
I talked to a guy who worked on the test, and he told me that they eventually determined that hours in CASS meant 1 year in Detroit’s environment in the 50s or 60s. This type of analysis asym be better suited to research or an initial validation. Are these parts stainless steel, or a non-ferrous alloy perhaps? Select from list below: None of our competition has built their company on the impressive credentials we have.
Note 1 — The following standards are not requirements. They all n368 different corrosion mechanisms on different substrates. ASTM B [link by ed. In a salt spray chamber these carbonate reaction products never form, and the zinc corrodes away rather quickly. Keep in mind that both tests have significant variability, so it’d actually take numerous tests, control panels or parts in both tests, multiple cabinets, etc.
How to compare ASTM B Salt Spray and ASTM B CASS Test?
We have ast, standard salt spray test equipment, but we want to do CASS test on this equipment. From beautiful Pine Beach New Jersey: This assumes, of course, that you’re running the test purely as a quality assurance test to make sure your process is running the same sample ast sample. Use of the test has improved the quality of electroplated parts and led to the development of new and superior electroplating processes.
The origin of your Note, however, that you must develop the g368 yourself. Is there any other accelerated tests available to correlate NSS b36 to avoid the longer time? For example, hot dip galvanizing is no doubt astk most durable of any finish, often surviving on electrical transmission towers for 75 years or more with no maintenance.
This sort of thing is usually agreed upon between a customer and supplier based on technical experience and judgement. Uses include research and development, specification acceptance, manufacturing control of product or process, and simulated service evaluations.
If the knurling process is causing iron contamination, passivating the parts should help. At the sstm, it was perhaps the biggest plating-on-plastics line in the country. If it is, what should we do? Good luck, but please accept the general thrust of this whole thread that any correlations between CASS, NSS, and real life are at best no better than the backup data for your parts that you have accumulated to demonstrate them: Any opinions or thoughts would be appreciated.
There is no simple formula or factor to convert one test to another. If you want to use CASS as a proxy for NSS, you will have to very carefully develop your own correlation which will depend on the substrate, paint, even the cabinet s themselves.