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What are the soil conditions for installing a magnesium anode rod, and what is the installation procedure?
What are the soil conditions for installing a magnesium anode rod, and what is the installation procedure?
Magnesium anode When used in soil, it should be buried in low-lying, moist areas. When used in soil, the magnesium anode rod must be kept inside its packaging bag.
Characteristics of magnesium anode products:
Magnesium anode rods can be used for corrosion protection in underground freshwater infrastructure, including oil and natural gas pipelines, water supply and drainage systems, underground cables, chemical plants, telecommunications facilities, ports, ships, and reservoir gates.
Main applications of magnesium anode rods:
Cathodic protection is suitable for metallic structures in media such as soil, freshwater, and seawater, including oil and gas pipelines, storage tanks, hot-water heat exchangers, and condensers.
During installation, the distance between the pipeline and the anode, as well as the distance between adjacent anodes, shall be no less than 3 meters and no less than 0.3 meters.
Magnesium anode rods have the following characteristics:
(1) Low specific gravity and negative potential;
(2) The driving voltage for iron is high, and the current efficiency is low;
(3) Particularly suitable for high-resistivity dielectrics.
Installation method for magnesium anode rods (soil environment):
In order to ensure Magnesium anode To enhance stability in the soil, appropriate chemical backfill material should be placed around the anode. Positioning the anode close to the soil and the backfill material improves the anode’s operating environment, reduces its grounding resistance, and increases its output current. The chemical composition of the backfill promotes the dissolution of anodic products, thereby minimizing unnecessary anodic polarization and maintaining long-term moisture in the anode bed.
The basic requirements for chemical packaging materials include:
It has low resistivity, good permeability, and is resistant to leaching. It also exhibits excellent moisture-retention properties. Magnesium anode packaging materials may be supplied in bags or installed via on-site borehole filling. Note that the bags must be made of natural-fiber fabrics; synthetic-fiber fabrics are strictly prohibited. Although on-site borehole filling delivers good results, it requires a substantial amount of filler material. Even a slight oversight can easily allow soil particles to contaminate the filler, thereby compromising its quality. The filler layer should be maintained at a uniform thickness of 5 to 10 centimeters in all directions.
Magnesium rod anodes may be installed individually or in groups. Anode burial configurations include vertical and horizontal installation, as well as axial and radial placement. The typical burial distance from the outer pipe wall is 3 to 5 meters, with a minimum of 0.3 meters; the top of the anode should be buried at a depth of no less than 1 meter. In northern regions, the anode must be installed below the permafrost layer. When anodes are installed in groups, the spacing between them should be 2 to 3 meters. In arid areas where the groundwater table is more than 3 meters below the surface, magnesium rod anodes should be buried even deeper. For rivers and lakes, sacrificial anodes should be placed as far as possible in stable positions on the riverbed (or lake bottom) to prevent damage from flood scouring or dredging operations. When using sacrificial anodes in urban areas and pipeline networks, care must be taken to ensure that there are no other structures—such as cables, water mains, steam lines, or other pipelines—between the anode and the structure being protected. On long-distance pipelines Magnesium anode The spacing between pipe groups is 1 to 2 groups per kilometer, while the spacing between urban pipelines and in-station pipelines is 200 to 300 groups.
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Henan Mingmei Magnesium Technology Co., Ltd.
Phone:+86-392-3658888 / 3659999
Email:hnmingmei@163.com
Address: Hebi National Economic and Technological Development Zone, Henan Province
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