The test standard summaries are for general guidance only. Though believed to be accurate at the time of writing, this may change over time. So this information should not be used as a substitute for referring to a complete test standard, at an appropriate revision level.
Note: the terms salt spray, salt mist & salt fog are all in wide spread use within corrosion test standards. In this context they can be considered to be equivalent and interchangeable terms.
SAE J 2334 Method C
Cosmetic Corrosion Lab Test
This test procedure has been field correlated, so it is claimed that the results obtained should correlate well to those obtained due to natural exposure, under severe corrosive conditions. It can therefore be used as a validation and development tool for automotive paint systems. This test is cyclic in nature, i.e.; test specimens are exposed to changing climates over time.
Test specimens are placed in an enclosed chamber and exposed to a changing climate that comprises of the following 3 part repeating cycle. 6.0 hours exposure to a water fog/condensing humidity climate of 100%RH at +50C. This is followed by 15 minutes immersion in (or a direct spray of) salt water at ambient temperature. This is followed by 17 hours 45 minutes of air drying in a climate of 50%RH at +60C. The number of cycle repeats and therefore the test duration is variable.
This test is also referred to as a Cyclic Corrosion Test, often abbreviated to CCT.
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