What is galvanic corrosion and how can it be prevented on aircraft structures?

• A. A physical wear mechanism due to friction.
• B. Oxidation due to air exposure.
• C. Corrosion caused by ultraviolet light exposure.
• D. Electrochemical corrosion caused by dissimilar metals in the presence of an electrolyte; prevented by isolating metals, coatings, and compatible materials.

Answer: (D)