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Uncoated aluminum boiler with brass group head corrosion risk? (lemmy.nowsci.com)

submitted 3 months ago by [email protected] to c/coffee

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Hi all,

I've got an uncoated aluminum boiler to replace the flaking one in my Gaggia Classic Pro Evo. Given that aluminum boiler coupled with the brass group head will cause galvanic corrosion, what are my options?

I know I can wait for companies to get chrome plated group heads in stock, but I hear the new (since April) GCP Evos are using the brass group head and the uncoated boiler. How are they pulling that off?

Thanks.

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[–] [email protected] 1 points 3 months ago (1 children)

Disclaimer that I have not worked on espresso machines in a bit.

When i did that was usually not a problem, swimming pools filters yes, espresso machines no.

Direct contact could be a problem, though not always. The bolts holding everything together were generally more of an issue, grease helped with that.

The most common issue i saw was caused by water with a high mineral content. But that was scaling more than deposition.

[–] [email protected] 2 points 3 months ago

Thank you. I'm using RPavlis water, so low mineral content.