Magnesium anodes have a current efficiency of about 50% and may be less affected by the environment. When the salt content in the soil or water is low, the current output is small, and therefore, its own corrosion is relatively large. When the soil resistivity is high, the anode output current is small, the anode surface is easily passivated, and the ground resistance is further increased, so that the anode output current is further reduced.
This product has the following features:
(1) Small specific gravity and negative potential
(2) High driving voltage for iron, low current efficiency,
(3) Especially suitable for use in high resistivity media.
installation:
When installing, the distance between the pipeline and the anode and the distance between the anode and the anode should be more than three meters, and the small should not be less than 0.3m.
When used in soil, it should be buried in a low-lying and moist place. (For the resistivity greater than 100Ω·m, it is recommended to use banded magnesium anodes.) Use caution: Avoid impact with steel structures. Magnesium alloy sacrificial anodes are produced according to the national standard GB/T17731-2004 "Magnesium alloy sacrificial anodes". The anodes used in pipelines comply with the SY/T0019-97 "Code for Sacrificial Anode Cathodic Protection of Buried Steel Pipes". After the anode is put into the earth pit in the dry area of ​​the soil, the packing material should be fully saturated with water to backfill the soil so as to prevent the anode from being fully electrically conductive. When used in soil, the anode must be embedded in a filler bag. Cathodic protection for metal structures used in soils such as soil, fresh water and seawater, such as petroleum gas pipelines, storage tanks, hot water exchangers, condensers, etc.
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