The major problem has been the formation of a non-conductive layer on the magnesium anode
blocking the recharging of the battery.
A magnesium anode
and a copper cathode proved to be the most effective electrode combination of those studied producing an adequate cathodic protection current for 1 [m.sup.2] of submerged concrete of for 4 days.
The rivet-metal galvanic interaction (PC-Mg) that displayed the lowest current density also experienced the lowest visible corrosion damage to the magnesium anode
. In contrast, the galvanic interaction between the IVD aluminum-coated steel rivet (IA-Mg), yielding the maximum galvanic current also displayed maximum visible corrosion damage to the magnesium.
If you replaced the magnesium anode
rod with a similar one, the problem has recurred.
A current through the earth can be easily produced by galvanic action from the energy of corrosion of a magnesium anode
. In this case, a piece of magnesium is connected to the pipe with wire and buried, away from the pipe.
Rechargeable magnesium battery system with magnesium anode
may provide an alternative candidate that is competitive with post Li-ion batteries containing a lithium metal anode due to a relatively low price ($2700/ton and $64,800/ton for Mg and Li, resp.), a high theoretical volumetric capacity (3,832 mAh [cm.sup.-3] for Mg and 2,062 mAh [cm.sup.-3] for Li), and a higher expected safety (less dendritic morphologies for magnesium deposits than lithium) for magnesium compared with lithium [1, 2].
* A magnesium anode
rod protects your tank better but doesn't last as long as an aluminum/zinc rod.
Therefore, contact of magnesium with any other metal in the presence of an electrolyte can lead to attack of the magnesium, the severity depending on the ratio of the areas of the magnesium anode
and the dissimilar cathode (a low ratio means worse corrosion).
The magnesium anode
system was diligently monitored and depleted anodes were diligently replaced.
One option is to install a sacrificial magnesium anode
to the lift system.
This is done by installing a replacement magnesium anode
and connecting it to the gas line.