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.
Home Â» Car Maintenance Â» How to Clean and Prevent Car Battery Corrosion. How to Clean and Prevent Car Battery Corrosion Posted on Autos.com Editor. in Car Maintenance. on October 7, 2013. Car battery corrosion is a major contributor to the degraded performance and shortened life expectancy of led acid car batteries. The colored fuzzy build up on the car battery terminal is corrosion. If there is enough corrosion built up for it to show up as even a small layer of white or bluish fuzz on the car battery terminal, the electrical consequences are already building.