The largest potential between magnesium anode and a steel protected construction in comparison with zinc and aluminum anodes allows one to use less number of magnesium anodes than zinc or aluminum anodes under equal conditions. What is more, magnesium anodes have no polarization which reduces electrochemical capacity.
The number of magnesium anodes PM 20U / PM 10U / PM 5U per one unit of pipe range dependes on the weight of the anode and the properties of the soil. On average, anode PM 10U protects a part in 1 - 2 km pipeline. Design of a project states the number of magnesium anodes and the places for their installation.
The procedure is as follows:
Anode PM 10U (PM 20U or PM 5U) factory packaged in powder activator are mounted as follows: