The Goal of Accelerated Testing

The goal of testing the corrosion-protection ability of a coaling is really to answer two separate questions  

Will the coating continue to provide corrosion protection over a long period  

Coatings of differing type cannot be expected to have a similar response to an accentuated stress. 

Scaling down wet-dry cycles changes mass transport phenomena. 

Climate variability means that the balance of stresses, and subsequent aging, is different from site to site. 

---