The galvanic anode is an important product that is designed to protect important but susceptible metal structures from corrosion. Basically, these are submerged or buried features that are vulnerable to accelerated wear due to exposure to moisture. This anode component is fabricated from a more reactive metal and installed in the pertinent feature. When the items are exposed to water, the reactive anode will be corroded in preference over structures such as water heaters, boats and pipelines.
There are different materials used in anode fabrication, but magnesium has numerous benefits compared to alternatives. This type of galvanic metal can protect most metal structures because of its high reactivity, and it has no limitations in terms of temperature and general environment. Unfortunately, the product is relatively pricey, so frequent replacement can be very expensive. Here are guidelines on extending the magnesium anode lifespan.
Monitor Water Quality
The quality of the water in which the anode will be used will affect the rate of magnesium corrosion. This property refers to the special characteristics of the water, particularly the chemical aspects. Generally, the magnesium rod should not be installed in hard water because of the difference in terms of reactivity. The anode will react at an accelerated rate to the minerals and salts in the hard water, causing premature corrosion.
If you are installing the magnesium rod in a water heater and the supply has hard water, it is prudent to add a softener for better performance. However, you should not soften completely to zero because the added chemical might have a negative impact on the tank and anode. If the anode is intended for use in boats or pipes and the water is hard and saline, consider selecting zinc anodes.
Choose One Anode Material
The installation of two sacrificial anodes is suitable for big metal structures for better protection. However, it is important to install two magnesium anodes instead of products fabricated from two different materials. For example, if you purchase a heater with a pre-installed aluminium anode and add a magnesium one, the latter will wear faster. Aluminium is less reactive, so the magnesium anode will be sacrificially corroded to protect this metal and the heater.
Finally, you should regulate the environmental temperature in which the galvanic anode will be used. This is important when working with industrial pipelines that are prone to heating and water heaters. Magnesium is unreactive in cold environments but it will corrode easily as temperatures rise. Therefore, do not utilise higher than necessary temperature for a prolonged lifespan.Read More