Magnesium alloy sacrificial anode manufacturer | directly connected to pipeline

  Magnesium alloy sacrificial anode manufacturer | directly connected to pipeline
The corrosion behavior of magnesium in electrolyte solution is determined by its very negative potential and the nature of the protective film on the surface
2
3 the standard electrode potential of magnesium is -2
37v (she), and the non-equilibrium electrode potential changes with the properties of corrosive medium
2
2 magnesium is used as sacrificial anode
For example, the potential of magnesium in seawater is - 1
5V (SCE), because the corrosion product magnesium hydroxide is insoluble in alkaline medium
3
3 during the effective protection period, the valve body surface and butterfly plate surface in contact with seawater inside the protected gate shall not produce any corrosion, and the degree of protection shall be more than 95%; 3
4 at the same time, it can also eliminate the potential hazards caused by seawater corrosion of valve shaft, bolts and other stainless steel parts According to the notice of the national nonferrous metals standardization technology * * * nonferrous metals Standardization Committee (2008) No
37 on holding the nonferrous metals standardization examination and approval meeting and discussion meeting, the nonferrous metals Standardization Committee is scheduled to hold the nonferrous metals standardization examination and approval meeting and discussion meeting in Dandong City, Liaoning Province from August 21 to 24
Forged magnesium alloy can be made into parts with complex shape and inner cavity shape through forging process
The main alloy elements are aluminum, zinc, manganese, zirconium, thorium, rare earth metals, etc
So it is called cathode protection of sacrificial anode
The research, development and application of magnesium alloy surface treatment technology at home include Shenyang Institute of metals, Chinese Academy of Sciences, Beijing General Institute of nonferrous metals, Shanghai Institute of Microsystem and information technology, Chinese Academy of Sciences, Beijing Normal University, Chongqing Fengtai surface technology research, Lanzhou Dacheng Automation Engineering Co
, Ltd
, Xi'an University of technology and other related processing enterprises

Construction instructions and requirements of packaged sacrificial anode and related supporting products
  Magnesium alloy sacrificial anode manufacturer | directly connected to pipeline
Installation methods and requirements of sacrificial anode
1、  The buried depth of the connecting cable of the sheathed sacrificial anode (hereinafter referred to as anode) shall not be less than 0
7m, and the cable length shall be reserved during laying

2、  When the anode cable joint is connected with the pipeline, it shall be connected by thermit welding technology

3、  Before welding, the welding spot position of the pipeline shall be cleaned to expose the metal surface

4、  After welding, the welding spot shall be subject to anti-corrosion treatment again and shall be carried out in strict accordance with the requirements of the drawing

5、  After the anode bag cotton cloth bag is buried in the anode pit, sufficient water shall be poured (the outer packaging nylon bag shall be thrown away) to fully soak it

6、  The distance between the anode embedding position and the pipeline shall not be less than 0
3m

7、  The anode shall be buried below the freezing line

8、  When the anode group is buried (when more than one set of anodes are connected at one connection point of the pipeline at the same time, it is called the anode group), the distance between the anode and the anode should be 2m

9、  When backfilling after anode embedding, tamp and water every 20 ~ 30cm, and continue to backfill and tamp after water seepage
And make the filling materials reach saturation, fill and restore the landform

10、  Metal structures are not allowed between the buried position of anode and the pipeline

11、  A long part of the protected pipeline is covered with concrete, which will lead to the potential drop of this section
A set of sacrificial anode shall be added at both ends of the pipeline where the pipeline is covered with concrete to make up for it

  Magnesium alloy sacrificial anode manufacturer | directly connected to pipeline
The correct embedding method of anode is to alternately bury each set or each group on both sides of the pipeline
If limited by geographical conditions, two sets of adjacent anodes must be set on the same side of the pipeline
Jiaozuo Libo Light Alloy Co
, Ltd
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  Libo specializes in cathodic protection
Tel: 13939157916