I flew sea planes in salt water.
Corrosion is a big deal. We took it out every day to rinse and service it.
With heavy spray 16 times a day from take offs and landings salt get everywhere, including places you cannot inspect and rinse daily.
Made me nervous to see a flap bracket get thinner every day.
Those planes were made for fresh water lakes in Canada, not salty Carribean waters.
A few years after I left the company the same plane came apart killing everybody.
DHC-6-300. RIP