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 and 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.
Copper Accelerated Acetic Acid Salt Spray (Fog) Testing
Can be used to test the relative resistance to corrosion of anodized aluminium and decorative copper/nickel/chromium or nickel/chromium coatings on steel and zinc based die castings, when exposed to a copper accelerated acetic acid salt spray climate at an elevated temperature.
Test specimens are placed in an enclosed chamber and exposed to a continuous indirect spray of acidified (pH 3.1to 3.3) salt water solution, which falls-out on to the specimens at a rate of 1.0 to 2.0ml/80cm²/hour, in a chamber temperature of +49C. This climate is maintained under constant steady state conditions. The test duration is variable.
This test is also referred to as a CASS test.
For further information on ASTM standards visit; www.astm.com