Corrosion...
All materials used for mechanical parts and body work that are used to construct such vehicles undergo extensive tests. From UV tests to massive stress tests. One test in which a lot of focus is put on is the salt spray test. Specimens are left for 100's and 100's of hours, sometimes 1000's of hours and constantly exposed to high concerntrations of salt spray. The specimens are examined at regular intervals for degradation, pitting, corrosion etc. The best performers are identified, maybe some coatings are applied for example HVOF to increase life, and the parts go into production.
So rest assured, as far as corrosion is concerned with regard to the brine, depending on the aircraft / vehicles age and maintainence record you should be good. I'd be more bothered about sand and grit damage rather then salt. It is quite amazing, a very small quantity of sand or grit can be very destructive indeed.