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.
The VW Volkswagon PV 1200 Test Specification describes an environmental cycle test (elevated temperature/low temperature cycle) for testing units, e.g. vehicle parts in the engine compartment.
The behaviour of the units and/or parts during environmental cycle stressing by means of cycling temperature and moisture shall be assessed here (e.g. susceptibility to cracks, deformation, separation of the composite material, etc.).
The purpose of the test specifications (e.g. temperature -40 °C) is to uncover component weaknesses in a short-term test with accelerated time effect, not to define general component requirements for continuous operation. This is a VW Volkswagon / Audi Test Standard. Also see PV 1209 % PV 1210.