Controlled laboratory exposures answer different questions
- Salt-spray testThis term
The specimen receives a defined salt-mist exposure. State the method, orientation, duration and corrosion acceptance criteria.
- NSS / AASS / CASS
Neutral, acidified and copper-accelerated acidified salt spray are different exposures. Do not substitute one result for another method.
- Damp heat
Elevated temperature and humidity are combined under a defined procedure. Confirm whether the method is steady, cyclic or another specified sequence.
- Accelerated weathering / aging
Weathering includes defined light and environmental exposure; accelerated aging covers broader intensified conditions. Validate any relation to field use separately.
Salt mist, acidified corrosion exposures, humid heat and light-based weathering stress different aspects of a specimen. The test method and acceptance criteria must accompany any reported result.
Conceptual chambers with no exposure concentration, duration or field-life factor. An accelerated test does not give a universal service-life conversion or approval for every environment.