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MHerder
Joined: 11 Feb 2008
Posts: 143
Location: Fort Worth TX
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 Posted: Sat Mar 22, 2008 7:15 pm Post subject: Galv Firewall Question |
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I am using Cortec as a primer for the rest of the airframe, but what would be appropriate to use at the galv firewall and stiffener interface?
I am concerned about the dissimilar metals in contact, but I am probably just over thinking this as I have a tendency to do. Galvanizing uses zinc as a protection for corrosion on steel. Does Zinc and aluminum do anything funny over a long duration in contact?
Paralysis by analysis....
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psm(at)att.net
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| Posted: Sat Mar 22, 2008 7:34 pm Post subject: Galv Firewall Question |
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I think you will find galvanized steel is immune to just about
everything. This includes all forms of paint (possibly with
exceptions) along with welding. For the most part, I think you can
ignore corrosion issues with this stuff.
Paul
XL fuselage
At 08:15 PM 3/22/2008, you wrote:
| Quote: | I am using Cortec as a primer for the rest of the airframe, but what
would be appropriate to use at the galv firewall and stiffener interface?
I am concerned about the dissimilar metals in contact, but I am
probably just over thinking this as I have a tendency to
do. Galvanizing uses zinc as a protection for corrosion on
steel. Does Zinc and aluminum do anything funny over a long
duration in contact?
Paralysis by analysis....
|
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bryanmmartin
Joined: 10 Jan 2006
Posts: 1018
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| Posted: Sat Mar 22, 2008 8:26 pm Post subject: Galv Firewall Question |
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Zinc and aluminum play well together, they don't react very strongly.
Using Cortec between them wouldn't hurt. Aluminum and stainless are
more of a problem.
On Mar 22, 2008, at 11:15 PM, MHerder wrote:
| Quote: |
>
I am using Cortec as a primer for the rest of the airframe, but what
would be appropriate to use at the galv firewall and stiffener
interface?
I am concerned about the dissimilar metals in contact, but I am
probably just over thinking this as I have a tendency to do.
Galvanizing uses zinc as a protection for corrosion on steel. Does
Zinc and aluminum do anything funny over a long duration in contact?
|
--
Bryan Martin
N61BM, CH 601 XL,
RAM Subaru, Stratus redrive.
do not archive.
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Bryan Martin
N61BM, CH 601 XL, Stratus Subaru.
do not archive. |
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