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NCG27
Joined: 29 Jan 2013
Posts: 5
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 Posted: Fri Feb 01, 2013 7:43 pm Post subject: Aluminum Sheet Discoloration |
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Been on 'layoff' from building due to job issues, marital issues...etc. Trying to get back going. I"m building from plans only. My aluminum sheets have been in storage for about 5 years. They have gotten moisture between them. They are discolored. It's not a powdery substance on them.
Just looks like discoloration. Are these sheets still good to use or will I need to buy more?
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carlossa52(at)gmail.com
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| Posted: Sat Feb 02, 2013 7:10 am Post subject: Aluminum Sheet Discoloration |
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While I don't think that's an issue, I would ask ZAC.
I would also see if scrubbing with scotch-brite removes the discoloration.
Welcome back
Carlos
CH601-HD, plans
On 1 February 2013 22:43, NCG27 <randyebryant(at)gmail.com (randyebryant(at)gmail.com)> wrote:
[quote] --> Zenith601-List message posted by: "NCG27" <randyebryant(at)gmail.com (randyebryant(at)gmail.com)>
Been on 'layoff' from building due to job issues, marital issues...etc. Trying to get back going. I"m building from plans only. My aluminum sheets have been in storage for about 5 years. They have gotten moisture between them. They are discolored. It's not a powdery substance on them.
Just looks like discoloration. Are these sheets still good to use or will I need to buy more?
[b]
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airplayn
Joined: 23 Aug 2012
Posts: 8
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| Posted: Sat Feb 02, 2013 8:09 pm Post subject: Aluminum Sheet Discoloration |
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this is most likely a thin film of aluminum oxide and a very mild acid (like vinegar and cream of tartar mixture NOT muriatic etc.) should help remove the stain. Polishing may be necessary afterwards. (I have a BS in chemistry)
ALCLAD plates have a thin coating of pure aluminum pressed into the surface and is a slight oxide is supposed to form to protect the alloy underneath but other alloys do not have this pure aluminum coating so the other metals in the alloy are exposed and can oxidize and cause staining.
Timothy A. Kiehl
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“The universe is found art … from chaos emerges beauty”
From: carlossa52(at)gmail.com
Date: Sat, 2 Feb 2013 10:08:46 -0500
Subject: Re: Zenith601-List: Aluminum Sheet Discoloration
To: zenith601-list(at)matronics.com
While I don't think that's an issue, I would ask ZAC.
I would also see if scrubbing with scotch-brite removes the discoloration.
Welcome back
Carlos
CH601-HD, plans
On 1 February 2013 22:43, NCG27 <randyebryant(at)gmail.com (randyebryant(at)gmail.com)> wrote:
[quote] --> Zenith601-List message posted by: "NCG27" <randyebryant(at)gmail.com (randyebryant(at)gmail.com)>
Been on 'layoff' from building due to job issues, marital issues...etc. Trying to get back going. I"m building from plans only. My aluminum sheets have been in storage for about 5 years. They have gotten moisture between them. They are discolored. It's not a powdery substance on them.
Just looks like discoloration. Are these sheets still good to use or will I need to buy more?
st" target="_blank">http://www.matronics.com/Navigator?Zenith601-List
http://forums.matronics.com
="_blank">http://www.matronics.com/contribution
[b]
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_________________
Tim Kiehl
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