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.
A major contributor to the forming of oxides is the fact that all base metals and alloys have different electri-cal potential.And that brings us to the first of the two major causes of corrosion: electron flow, or galvanic action, caused by the flow of electrons between the differing metals in the alloy.he owner re-layed to me his mechanicâs insistence that the airplane was corrosion free. I unzipped the spanwise headliner access, pulled down the original fiberglass in-sulation and found a mess. The picture says it all. On a scale of 1 to 5, I would rate this level of corrosion a healthy 4+.