Re: Galvanic corrosion and dissimilar metals

OTOH, immersing the elements is more energy efficient. Every design has its trade offs. Immersed elements are certainly the typical solution in most electric water heating applications, though external elements are used where the device is sometimes run dry by design - e.g. electric fry pan.

"Tex" <Texas_Coffee@xxxxxxxxxxxxx> wrote in message news:6c12344d-d53c-40d0-84cf-3c5f79d9ceae@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
On Aug 3, 12:26 pm, "Jack Denver" <nunuv...@xxxxxxxxxxxx> wrote:
....
All in all I'd say aluminum is not the ideal boiler material but it's not so
bad that it should be ruled out either. The Italian manufacturers preferred
working with materials that were a lot softer than stainless steel (probably
the best material) because they were much easier to work with and did not
require sophisticated/expensive tooling to create.
....

I believe Gaggia opted for aluminum to facilitate the use of external
heating elements. It must've been a good idea, because I can't
remember the last Gaggia I saw with a ground fault. BTW, this is one
of the most common causes of failure in machines with immersed heating
elements.

Tex

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