General Discussions

[LP]

Seahawk helicopter rotor assemblies employ cadmium-plated Cr-Mo alloy steel and 2014-T6 aluminium alloy.  Wind turbine gearboxes use steel, aluminium or brass.

Both those points are simply generalisations, the parts corroding are special lightweight alloys chosen specifically for resistance, chosen for there ability to be additive manufactured and none are plated. Titanium is only one of them, there is very little steel it's too heavy. And you would know mixing metals in such and environment can make things even worse without mitigation steps.

The wind turbines are in the same locations, but none survive 30 years on original parts, just like ships have been in dry dock and recoated dozens of times and had many components replaced.

I was sponsored by the Fed's to go to Germany and study this very issue among others a decade or so back.