Blood pressure is usually expressed in terms of the systolic pressure (maximum during one heart beat) pressure over diastolic pressure (minimum in between two heart beats) and is measured in millimeters of mercury (mmHg), above the surrounding atmospheric pressure (considered to be zero for convenience).
Corrosion on the terminals is due to hydrogen gas being released from the acid in the battery. It mixes with other things in the atmosphere under the hood and produces the corrosion you see on the terminals. Generally, if the corrosion is occurring on the negative terminal, your system is probably undercharging.
Rust and corrosion build up on the terminals of a battery. This is largely due to the acid inside the battery and the charge it generates as a result of the chemical reaction in the cells.This rust and corrosion, however, are bad for terminal conductivity.o the same for the positive terminal. Sprinkle a liberal amount of baking soda on the battery terminals and on the cable clamps. Clean the inside of the clamps with a wire brush. Remove any rust that has built up on the inside of the clamp.