King Louie is a supporting character from the 1967 Disney animated feature, The Jungle Book. Louie is an orangutan, inspired by Rudyard Kipling's classic novel. Louie did not appear in the book, however, because orangutans are not native to India.
Quick Answer. Overfilling the battery, poor design of the vent cap, age and distortion of the gaskets can all cause battery terminal corrosion. Nitrogen gas is emitted by the electrolyte in the battery. Material in the battery terminals and cable ends reacts with the nitrogen gas, and corrosion begins to form. Keep Learning.
I had a similar issue today while driving the engine light came on. The battery terminals were corroded. So I used the baking soda to clean it off. Removed the -ve terminal for a minute or so then connected it back. Engine light has turned off now :) Battery issues do light the engine light on due to low voltage caused by corrosion. Its an ignition coil, about $25, just had to do mine, keep one for a spare. Also seems once they start going the car usually for the most part is on its way out.