What is used to neutralize the electrolyte from a lead-acid battery that has been spilled on an aircraft structure?

• A. A solution of bicarbonate of soda and water.
• B. Vinegar and water.
• C. Ammonia and water.
• D. Pure water.

Answer: (A)

Neutralizing the acidic electrolyte is essential when a lead-acid battery spill occurs on aircraft structure. A mild base like bicarbonate of soda in water provides a safe, controlled neutralization, turning the acid into relatively harmless salts without releasing hazardous fumes. The reaction with sulfuric acid forms sodium sulfate, carbon dioxide, and water, and the fizzing tells you the neutralization is progressing. After the fizzing stops, wipe up the residue and rinse with clean water to remove salts and prevent corrosion. Vinegar is acidic and would not neutralize the spill. Ammonia is a stronger base and can be caustic and irritating, with potential corrosion risks. Pure water alone won’t neutralize the acid and would leave corrosive material behind.