citro wrote: If you want to cover a conductive metal, with another conductive metal, you can make a metalization.
For example, the 1 Cent, 2 Cent and 5 cent € uro coins are pieces of common scrap metal (which rust) and which are covered with copper (a few microns).
covering the scrap with a thin layer of another metal does not certainly protect this scrap when it bathes in a conductive liquid
the case of coins, as explained, is absolutely not made to fill your wallet with water (only one liquid at a time
)Christophe, for your tank, especially not copper, because it will serve as a cathode and the iron will make the anode
and as the anode disappears
in the electric cumulus tanks, the inside is enamelled to reduce the surface which must serve as a cathode for the magnesium anode:
a large anode compared to a small cathode will last longer than the reverse
if the cumulus was not enamelled, the magnesium anode would only last a few months and more
to note : cathode anode makes a battery, but only if they are in contact (tight screwing or welding)
magnesium is well suited for cumulus to Hot water
zinc is well suited for cold water, but especially not for hot water, it seems that it does the opposite effect
citro wrote:Your problem is if I understand correctly to want to treat the inside of the spiral tube which plays the role of exchanger.
How can you control that the treatment is correct ???
thread a not too fine magnesium wire
as long as there is magnesium left, your iron pipe will be under protection
but check often enough that there is left because if the iron is bare, it will make a large cathode and the magnesium will melt quickly enough
to note: in a cumulus, the interior enamelled coating is almost null in its anti-rust functionality if it is not accompanied by the magnesium anode and that moreover this anode is in good contact with the cumulus iron ( not only deposited at the bottom and resting on the insulating enamel)
all that because any coating has defects or micro-cracks, so if the iron is anode compared to another metal present in the area or itself (never homogeneous iron flow), the stitching at the fault location is quick and can go very quickly
on the other hand, during an assembly with a magnesium anode, it is as if the iron is too busy serving as a magnesium cathode, that it forgets to serve as an anode for itself, but be careful, do not use stainless steel because then the iron will turn its attention to stainless steel and melt
bolt
by supplying the wooden tank with solar energy. The downside is that much of the solar preheating will likely go into the balloon losses.
