There’s a lot of emphasis on airframe corrosion, yet owners and technicians rarely consider the corrosion that plagues avionics—a system that can be more susceptible than the airframe. Big-airplane maintenance programs keep on top of it for good reasons.
Corrosion can build on components that you might not give a second thought. This includes contact pins on radio connectors, antenna RF connectors (and the hidden skin at the base of the antenna—a real disaster in the making) and components that reside under the floor, inside the wing root and inside of radios.