Letter 28041

Testing Organic Coatings  

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I am developing corrosion-resistant organic coatings for automotive metals. I usually send my coated panels for salt spray testing to evaluate the coatings. But salt spray results are not reliable. I came across the SAE J2334 [link is to spec at TechStreet] test. I want to use this test. But I am not sure how many cycles of exposure I should ask for. My coatings hold good for 336 hrs in salt spray. How many cycles would that rougly translate in SAE J2334? Maybe it's not possible to correlate salt spray test and SAE J2334 but if I have to decide on the minimum number of cycles, what number should I choose?

Karthik Suryanarayanan
Graduate Student - Cincinnati, Ohio, USA

SAE J2334 is typically conducted for 60 cycles for automotive paint systems.

Cynthia L. Meade
- Sylvania, OH, USA

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