Author Topic: Galvanic Corrosion HELP !!  (Read 619 times)

tombogan03884

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Re: Galvanic Corrosion HELP !!
« Reply #20 on: April 21, 2021, 08:50:35 AM »
Vinegar will etch aluminum.... it's one of the things you can pre-treat raw aluminum with to help paint stick better. It might have taken a little longer because the aluminum was anodized, but it'd do it.
Bleach is straight-up corrosive, but it takes time too.

That's handy to know.
I may want to etch "Go f*ck yourself Joe" on an aluminum plate.   ;D
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billt

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Re: Galvanic Corrosion HELP !!
« Reply #21 on: April 21, 2021, 10:25:27 AM »
So.... Bright and early this morning I went to a door and windows place right down the street from me. I brought my phone and showed the guy the pictures I posted here. He told me he has seen this type of corrosion a lot in this area. It can be a combination of many things. Mostly it's a chemical reaction with the chemical mixture in the concrete, which conducts electricity through the Aluminum track.

Add ground moisture and time, and this is the result. The solution is a new slider, which I expected. He sells Milgard, which is what I had when I replaced the slider in my other house in Glendale. They have several different grades and sizes. For me it will run around $1,400.00 and change for something with halfway decent quality.

He's coming in a couple of weeks to do some exact measuring, then he'll order it and I'll be done. Most all of the models he sells are Vinyl, so this can't happen. (Vinyl doesn't conduct electricity, and is far more corrosion proof). I'm not worried about direct sunlight exposure because it will be protected by the patio roof.

When he's done, it will be done. No painting, stuccoing, trimming, or spackling, on my part. For that price I'm seriously thinking about letting him do both of them. That way they'll match. The screen door on the one in my dining room is a POS that doesn't line up right. He told me it could take 6 to 8 weeks because of Covid. Everything is back ordered, but he told me they are shipping now quite regularly.   
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PegLeg45

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Re: Galvanic Corrosion HELP !!
« Reply #22 on: April 21, 2021, 11:36:04 AM »
Good deal, Bill.....you beat me to it on the vinyl.
I was going to say, if you replace it, go with vinyl-clad or get the installer to line the opening with a vapor barrier. There's some decent stuff out now for lining door and window openings to prevent direct contact.
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billt

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Re: Galvanic Corrosion HELP !!
« Reply #23 on: April 21, 2021, 12:01:27 PM »
Good deal, Bill.....you beat me to it on the vinyl.
I was going to say, if you replace it, go with vinyl-clad or get the installer to line the opening with a vapor barrier. There's some decent stuff out now for lining door and window openings to prevent direct contact.

He told me that he was going to do both. After he gets the old track out, he'll scrape, brush, and blow out as much of the contaminated area as possible, then apply a brush on coating. Then over that he'll place a vapor barrier so nothing will be in direct contact with the concrete itself. He said he will guarantee that it will never occur again.
A recent study has shown 1 out of 3 liberals are as stupid as the other 2.

 

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