Normally potable hot water containers (kettles and tanks) are provided with a passive coating to protect against electrochemical corrosion favored by water.
Since there is essentially no passive anti-corrosion protection that can guarantee total coverage of the walls of a boiler, it is necessary to intervene with an additional active protection which traditionally consists of a magnesium anode, which obviously is subject to consumption.
As the magnesium anode is consumed it needs periodic replacement so at least once every two years with appropriate inspection when it is consumed it must be replaced.
On this page you can find magnesium anodes (or sacrificial anode) that can be used for galvanic discharges, boilers, accumulations and other applications.
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