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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How can we help? So my question is whether there is any specific requirement of CASS test for threaded, knurled area? Any opinions or thoughts would be appreciated. If you’re trying to mimic some field failure, you’re talking completely different corrosion mechanisms For more specific safety precautionary information see 8.
The cut edges of samples that are multilayered, coated, or plated are coated so as to not cause edge corrosion.
How to compare ASTM B117 Salt Spray and ASTM B368 CASS Test?
Can we take this as a thumb rule? It’s not possible to diagnose a finishing problem or the hazards of an asfm via these pages.
From beautiful Pine Beach New Jersey: In a salt spray chamber these carbonate reaction products never form, and the zstm corrodes away rather astmm. What is organic coating?
How to compare ASTM B Salt Spray and ASTM B CASS Test?
Uses include research and development, specification acceptance, manufacturing control of product or process, and simulated service evaluations. Touchstone performs corrosion aastm and accelerated life testing of virtually any material or device.
In either application, certain variations in the test procedures for different substrates and coatings may improve their predictive value. Inorganic coatings are coatings that don’t contain significant amounts of organic chemicals.
First a side note about CASS.
We are developing an alternative to Cadmium plating, and if there is a comparison that someone has done, it would be great to find the results of the comparison, i. The suitability of this test and correlation of results with service experience should be determined before it is specified for coating systems or materials other than those mentioned in this paragraph.
Chrome plating is organic or inorganic? 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 to sample. It could be done, but would you want a manufacturing process that requires constant microscopic analysis of test parts? One of the reasons predictive correlation of accelerated corrosion testing to real life is problematic is that the corrosion mechanisms are fundamentally different.
Pankaj, I doubt the standard ashm that specific, it is probably more a matter to discuss with your customer. They are referenced for information only: An ongoing discussion from through Note 1 — The following standards are not requirements. According astk him, CASS was used for chrome plated bumpers.
Our parts generally are aluminum with Cad Plating over electroless nickel plating. Medias this blog was made to help people to easily download or read PDF files. It is also applicable to the testing of anodized aluminum. This type of analysis may be better suited to research or an initial validation. In a salt spray chamber these carbonate reaction products never form, and the zinc corrodes away rather quickly.
None of our competition has built their company on the impressive credentials we have. He didn’t say how they defined failure in the test or the field. Ray Kremer Stellar Solutions, Inc. We manufacture parts for mostly military end use. Pankaj, I doubt the standard gets that specific, it is probably more a matter to discuss with your customer.
Most paints and powder coatings would be organic coatings. Accelerated corrosion testing is a QA measure often undertaken to get an early indication if something goes out of whack in the processing, such that the components are unlikely to survive the previously expected period in the real world.