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.
DEF STAN 133 method 14
Can be used to test the relative resistance to corrosion of components or equipment, when exposed to a changing climate of a salt mist (spray), followed by a high humidity, at an elevated temperature.
Test specimens are placed in an enclosed chamber (a separate salt mist chamber and controlled humidity chamber are generally used), and exposed to a changing climate that comprises of the following 2 part repeating cycle. 1.0 to 2.0 hours exposure to a continuous indirect spray of salt water/synthetic seawater solution, which falls-out on to the specimens at a rate that consumes a volume of solution that represents approximately 1% of the volume of the test chamber per hour. During salt spray exposure the chamber temperature shall be at ‘normal laboratory temperature’. This is followed by 7 days exposure to a high humidity climate of 90 to 95%RH, in a chamber temperature of +35C. The entire test cycle is then repeated four times.
Note; DEF STAN 133 method 14 has been replaced by DEF STAN 00-35 Part 3 test CN2.