Galvanic corrosion

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I'm wondering if this is an example of galvanic corrosion. The brass has turned blue near the steel tank and near the stainless (I think) one way check valve.

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Looks chemical-related.
From another website:

Equation 1: 4Cu + O2 → 2Cu2O [red to pink]
Equation 2: 2Cu2O + O2 → 4CuO [black]
Equation 4: 2CuO + CO2 + H2O → Cu2CO3(OH)2 ["malachite," dark green to blue]
 
thats just normal copper/brass corrosion.

This is the bad stuff.


IMG_20190625_135216.jpg
 
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Op - I'd say NO.

Galvanic Corrosion needs three things to begin:
1) Two different metals
2) They have to be touching
3) Moisture present

There is a whole science behind understanding it.
Therefor, I take it seriously when doing auto & home repairs.
There is also a chart showing how similar (or different) metals are to each other / affecting their rate of galvanic corrosion.

One example: FORD attaching aluminum panels onto steel frames.
They must use a spacer as a separator.
 
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Originally Posted by eljefino
Doesn't look too different from mine. I wouldn't worry.

https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/5058458/1

I noticed you use a cycle stop valve. Have you ever been to the Terry Love plumbing forum? I asked basic questions over there and the minute they find out I have a monodrive they blame everything on that and they try to sell me a cycle stop valve LOL
 
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