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Magnesium Anodes
Anode is mainly used in equipment such as water heaters, heat Anode is mainly used in equipment such as water heaters, heat exchangers, evaporators, and boilers, etc. It can soften water, remove dirt, and prolong the life of the main machine. Magnesium alloy water heater sacrificial anode can be divided into casting type and extruded type is widely used for the anti-corrosion of water heater and boiler.



1. For enameled tanks, magnesium alloy anode is typically used for water with conductivity of 100~ 2000μs/cm. When water conductivity is over 2000μs/cm, magnesium alloy anode will be consumed quickly, so as need to be replaced with a new one very quickly.

 

2. For stainless steel tanks normally without coating, mg anode is not a good solution as it will be consumed very quickly and need to be replaced with a new one very quickly.

 

3. For enameled tanks, mg anode mass design shall be use a ratio over than 200g mg mass per one m2 tank surface area.

 

4. Lifetime of magnesium alloy anode depends on:

  

1) enameled area to be protected;
  

2) tank material;
  

3) water;
  

4) how tank and its inner parts are configurated and installed.

 

5. Properties of cathodic protection system by magnesium anodes:

  

1)The initial driving potential between magnesium anode and tank wall is about 1.0 V, this makes it an ideal power source to feed protection current for most water heater tanks.
  

2)Magnesium anodes do not adversely effect water inside tanks;
  

3)Magnesium anodes cost reasonably and is easy to be installed in tanks.

6. MTGREE Mg alloy anodes are produced in accordance with following international standards:

 

    GB/T 14488-2009, ASTM B843-1993, EN 12438-1998

7. Magnesium alloy anodes used in water heater tanks: 

 

By process

material

Diameter.mm

Length.mm

Installation Configuration

cast

AZ63

Ø22

100 ~ 400

 A threaded insert

cast

AZ63

Ø26

100 ~ 400

cast

AZ63

Ø33

100 ~ 400

extrusion

AZ31

Ø22

100 ~ 2000

 B pipe thread screw

extrusion

AZ31

Ø26

100 ~ 2000

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