ASTM water heater anode rod
Role of the sacrificial anode rod
The anode rod is the most important factor in determining the
working life of your water heater.
An anode rod is a steel core wire surrounded with one of three
different metals.
These metals include aluminum, magnesium, and zinc.
The rod is screwed into the top of your water heater and protects
your water heater from rusting.
When the tank is filled with water the anode rod sacrifices itself
to protect the exposed steel of the water heater, through a method
called electrolysis. Electrolysis happens when there are two pieces
of metal connected inside of water, the process makes the anode rod
corrode in place of the exposed steel in your water heater. During
this process the more noble (less reactive) metal will corrode over
the less (more reactive) noble metal. Aluminum, magnesium, and zinc
are all much less noble than steel, meaning they will corrode
before the steel, which is why they are used for anode rods.
Application of our magmesium anode rod:
Water Heater,Water container,Pre-polarization of steel structure in
seawater,Gas pipe,Anticorrosion of steel and iron structure where
high resistant and electrolyte(soil and water) existed.
Standard of Our water heater anode rod:
High Pure Magnesium
For Suburban Water Heater
9 1/4'' Overall Length
Saves Water Heaters From Harmful Water Contaminants
3/4'' NPT Thread
Type of Our water heater anode rod:
Extruded Magnesium Anode
Chemical composition %
| Alloy | Al | Mn | Zn
(max) | Ca
(max) | Si
(max) | Cu
(max) | Ni
(max) | Fe
(max) | Other Imp. |
| each | total |
| AZ31B | 2.5-3.5 | 0.2-1.0 | 0.6-1.4 | 0.04 | 0.10 | 0.01 | 0.001 | 0.005 | --- | 0.30 |
| Mg-Mn | 0.01 max | 0.5-1.3 | --- | --- | --- | 0.02 | 0.001 | 0.03 | 0.05 | 0.30 |
Specification and Dimension
| Diameter(inch) | Core eccentric(inch) | Core diameter(inch) | Straightness(inch/ 2 ft length) | Weight(lbs/inch) |
| 0.675-0.020 | 0.050 | 0.135 | 0.060 | 0.025 |
| 0.750-0.020 | 1/16 | 0.135 | 0.040 | 0.031 |
| 0.800-0.020 | 1/16 | 0.135 | 0.040 | 0.035 |
| 0.840-0.020 | 1/16 | 0.135 | 0.040 | 0.038 |
| 0.900-0.020 | 1/16 | 0.135 | 0.040 | 0.043 |
| 1.050-0.020 | 1/16 | 0.135 | 0.040 | 0.057 |
| 1.315-0.020 | 1/16 | 0.135 | 0.040 | 0.089 |
Electrochemical Performance
| Type | Electrode Potential -V(vs Cu/CuSO4) | Current Efficiency %(vs Cu/CuSO4) | Generating Current (A.h)/kg(vs Cu/CuSO4) |
| HB- I | 1.57 | 85 | 1150 |
| HB- I | 1.15 | 85 | 1150 |
* We also take customers’ requirements order.
Lucky Liu
lucky@hbnewmaterial.com
