In the case of corrosion on your vehicle's battery, acid from inside is reacting with the metal on the outside. If you ...

Battery corrosion occurs when old alkaline batteries leak acid inside their case, and since many electronic devices don't require regular battery replacements (we're looking at you, remote controls).

Each cell should contain an electrolyte solution, also called battery acid. Electrolyte solution contains sulfuric acid and is highly corrosive; carefully pour it into a bucket, then add baking soda ...