Dissimilar metal corrosion in the presence of sealants occurs how and how can it be prevented?

• A. Sealants neutralize electrolytes and stop galvanic cells.
• B. Sealants always prevent all corrosion regardless of metals.
• C. Sealants can trap electrolytes creating galvanic cells; prevent with barrier coatings, proper sealant selection compatible with metals and fluids.
• D. Using sealants eliminates the need for protective coatings.

Answer: (C)