Cathodic Protection Training Course

These pages are designed so that the student can click on each picture to get to the next page. In each case you will notice that the picture is the link.

For more than 30 years I have been seeking a way to explain how the measurements of voltages in cathodic protection work differ from the measurement of voltages in normal electrical and electronic work.

Many teachers use a comparison between water pressures under the influence of gravity to explain how electricity flows from a higher potential to a lower potential and it is for that reason that I am here using the same comparison to explain that we are not dealing with a single difference of pressure but with many individual measurements that need to be related together mathmatically to make any sense.

Four glass flower vases have been used as a convenient way to explain electrical pressures (potentials) related to corrosion.

Each vase is composed of three upright tubes connected by small tubes through which the water can pass.



Four of these vases have been placed in a clear plastic container that is divided into watertight compartments.

The right hand section has been filled with sand.