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Magnesium rods are excellent sacrificial rods, used to protect the inside metal surface of your water heater tank. The magnesium corrodes instead of your tank. Magnesium anode rods tend to be consumed quicker than Aluminum or Aluminum/Zinc/Tin anode rods due to the higher voltage they create during the sacrificial process. Even though Magnesium anode rods normally corrode at a slightly faster rate than most anode rods, dissolved magnesium in water can offer many health benefits.
Extruded Magnesium anode Rod (AZ31)
Chemical (%) | |||||||||||
Grade | Mg | AL | Mn | Zn | Ca | Si | Cu | Ni | Fe | Impurities | |
max | Max | Max | Max | Max | Total | Each | |||||
AZ31 | balance | 2.5-3.5 | 0.2-1.0 | 0.7-1.3 | 0.04 | 0.05 | 0.01 | 0.001 | 0.002 | 0.3 | 0.01 |
Open cicuit voltage (-v) | Close Circuit voltage (-v) | Actual capacitance (A.h/g) | Current Efficiency (%) | ||||||||
1.53-1.59 | 1.45-1.50 | 1.100 | 53 |
Rod Diameter | Tolerance | Core Diameter | Straightness | Unit weight |
inches | inches | inches | inches | lbs/ft |
0.500 | -0.020 | 0.135 | 0.060 in 2 ft | 0.180 |
0.675 | -0.020 | 0.135 | 0.060 in 2 ft | 0.300 |
0.700 | -0.020 | 0.135 | 0.040 in 2 ft | 0.324 |
0.750 | -0.020 | 0.135 | 0.040 in 2 ft | 0.372 |
0.800 | -0.020 | 0.135 | 0.040 in 2 ft | 0.420 |
0.840 | -0.020 | 0.135 | 0.040 in 2 ft | 0.456 |
0.900 | -0.020 | 0.135 | 0.040 in 2 ft | 0.516 |
1.050 | -0.020 | 0.135 | 0.040 in 2 ft | 0.684 |
1.135 | -0.020 | 0.135 | 0.040 in 2 ft | 1.068 |
2.000 | +/-0.024 | 0.188 | 0.250 in 10 ft | 2.357 |
Cast Magnesium anode Rod (AZ63) | |||||||||
Chemical (%) | |||||||||
Grade | Mg | AL | Mn | Zn | Si | Cu | Ni | Fe | Impurities |
Max | Max | Max | Max | Total | |||||
AZ63 | balance | 5.3-6.7 | 0.15-0.7 | 2.5-3.5 | 0.3 | 0.05 | 0.002 | 0.003 | 0.3 |
Open cicuit voltage (-v) | Close Circuit voltage (-v) | Actual capacitance (A.h/g) | Current Efficiency (%) | ||||||
1.5-1.55 | 1.45-1.50 | 1.105 | 50 |
Rod Diameter | Length | Core type | |||
mm | As per buyer request | M4 | M5 | M6 | M8 |
13 | √ | ||||
14 | √ | ||||
16 | √ | √ | |||
18 | √ | √ | √ | ||
20 | √ | ||||
21 | √ | √ | √ | ||
22 | √ | √ | √ | ||
25 | √ | ||||
26 | √ | √ | |||
28 | √ | ||||
32 | √ | √ | |||
33 | √ |
Water Heater Anode Rods
Replacing your anode rod at regular intervals may increase the life of your water heater, saving you money, time and the inconvenience of having to replace your water heater. One of the most important considerations in having a normal life span for your water heater is whether the anode rod is performing it's job - to divert corrosive action away from the tank walls to the anode rod. This is why they are known as sacrificial anode rods. Depending on the needs of the user, there are several options when making a selection. Magnesium, Aluminum, or a combination of Aluminum, Zinc, and Tin are the most common; there are also flexible options for low ceiling clearance or difficult access points, and hot water outlet styles for additional protection or for those who cannot remove their existing anode. The condition of your anode rod (and whether it is time to replace it) depends upon your water quality, how much the water heater is used, the running temperature, and of course the craftsmanship of the tank itself; it is also good to note that water softened with sodium often equals a shorter life for an anode rod, so being aware of all the factors that affect the anode rod will help you to keep your water heater in top working order.