I would like to see what is the closest word I can get that means vulnerable to the elements. One word is preferred, as opposed to a phrase. Here is a basic example:
Steel is ____________, but titanium is not ____________.
Ideally the word is not only relevant to corrosion like in the above example, but also other elements, whatever they may be (sunlight, wind, cold, ect)
Chemlights are ____________, but flashlights are not ____________.
(in the 2nd example the element implied is sunlight. Sunlight will degrade the chemlight, but will not impact the flashlight's performance -- not that you would use a flashlight on a sunny day, assumed you used at a later date at night after exposure to sunlight)