Corrosion of Elements

water-heater coils

The picture above depicts two heating elements.  They are from the inside of a water heater.  The one on the top is a new double-coil, and the one on the bottom shows what three years of corrosion can do to an element in a water-heater.  The corrosion was caused from calcium in tap water, though I thought it could have been caused by fluorine.  One way or the other, the lower element was why I had no hot water for a while, and the above element works nice when I have it on.  I posted the picture because I found it to be interesting.  From what I understand, about one in fifty hot water heaters endure a special phenomenon.  As they are all grounded, some can posses a magnetic charge that allows the elements to repel additives or contaminants contained in tap water.  Such a water heater can last for over 40 years.  Most will need their elements changed within five, however.  One way or the other, I am happy that the hot water heater works again. 🙂

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