Electrolytic conditions in the soil surrounding a buried structure determine the type of anodes employed in a cathodic protection system. In low-resistivity soil (under 2,000 ohm-cm), MESA’s line of magnesium anodes are the most economical choice. H-1 anodes are cast to meet ASTM B843, Alloy AZ63.

This unique composition allows for even current output and efficient protection. These anodes produce an open circuit potential of 1.53 – 1.55 volts, and have a current efficiency of 45 to 55%, when tested in accordance with ASTM-G97 procedures.

Typical Applications

H-1 anodes are recommended for use in low resistivity soils (typically below 2,000 ohm-cm). Because the anodes have a lower driving voltage than high potential anodes, they are ideally suited for structures where over-protection is of concern. Their lower current output allows these anodes to operate longer than high potential anodes in more conductive environments.