Corrosion Protection

[tjhickey]

Hi Group:

What do you guys think is a good way to provide for corrosion protection for
the Rebel? My project most likely will never see floats, although I live right on
the Mississippi, and we plan to install the float fittings. But I would guess that
there is less than a 5% chance it will ever go on water.
I know that Zinc Chromate is one material that has been used for years, but I
have not tried to buy any of it for a long time, and I think I may have been
told that it is no longer on the market in spray cans. I am not sure about that.

I have a friend who just started a Zenith 701, and Zenith provides a material
called Cortech vci-373 liquid wash primer/coating with corrosion inhibitor.
It looks like milk, and is brushed on and dries clear. I know nothing about it.

I have seen references on the List about using epoxy primer. I am assuming
that is a two part material that is sprayed on.

I have also heard about a water based product call something like "Deft".
Anybody recommend this?

So that is the question: What is a good choice for corrosion protection?
Oh, yes, I am building to LSA standards, so we got to stay light!


Thanks

Tim Hickey
Rebel 808
Box received today
Clock is ticking.



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[Ralph Baker]

This one has been around the patch many times. First, search the archives. That said, There are about as many opinions on this as there are builders. The 6061-T6 is quite corrosion resistant bare. Joints are the problem. Speaking as a builder that went through the 5 step process with alodine and strontium chromate on all surfaces - never again! Thorough cleaning and brush application of the MAM suggested primer (or another 2 part epoxy type) of joint surfaces only will get you in the air quickest. Then follow it up with Corrosion X every two years if you wish.

For an LSA every pound you add to the structure is slower climb and less useful load. While researching the archives do pull out the "Ontario mods" which really do add value and strength to compensate for the weight. Consider reducing the fuel to 2 bays each side. That will be about 30 gallons total. Always think "light" as you build. Read the manual through twice and then be sure you understand what you are trying to accomplish not only in the moment but also the next step. That will save some drilled rivets.

Above all, enjoy the process and welcome to the group.
Ralph Baker
Elite 611E (still enjoying)



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