[mattr47]

It's not the water per say. A car, laptop or airplane that is in fresh water will not work without an overhaul.

The salt water produces corrosion that fresh does not. That is why military aircraft operated near the sea get washed so much. Both inside and out, including the engines.

We would come back from overwater flights over the Atlantic and either go through a 'bird bath' which is basically a car wash for aircraft. Or they would drag a fire hose out, hook it up and spray everything down. It was pretty cool to watch the exhaust gas temps when the started dumping fresh water into the engine inlet.