nzrv8

nzrv8

Well Known Member
Hi All,
Now my fuselage is nearly complete I am at the stage where I need to think about wings. I want to go QB as I don't get enough time at home to build, and I want to fly this century!
The problem is - I've noticed the Sherwin Williams QB primer on my fuselage is not very good at resisting corrosion. I've now primed the inside of my fuselage with epoxy primer which was straightforward as most of the structure is accessible.
My question is - Is it possible to prime/treat the inside of a QB wing? Are there enough access points to get at the already assembled structure as it comes from Vans?
Given that a lot of NZ airports are close to the coast, corrosion protection is important to me.
Thanks,
Hugh
 
If your not opposed to it, I have corrosion proofed a lot of ga aircraft with corrosion x. It is fogged into the structure to help with corrosion. There are different companies that make similar products. It could be an option if you don't want to try to repaint. Worked really well in south Florida where I worked and a lot of the aircraft had it.
 
Ardrox AV8

I used Ardrox AV8 on my Cessna 150. Works well, only downside is if you need to access the tailcone (or any other part), the stuff is a bit sticky. It does penetrate between lap seams (rib/skin) which is good. On the other hand it will penetrate skin lap seams too, so best to do this treatment after the aircraft exterior is painted.
http://www.chemetall.aero/pdf/TDS ARDROX AV 8_pdf.pdf
I used PPG Super Koropon epoxy primer on the interior of my slow build RV-9A. It's pretty much bulletproof.
 
If you environment is not too corrosive, then suggest, as above after painting / flying for a bit, ACF-50 or similar treatment (I think some advise 6 months after painting?)

The QB primer looks rubbish, but I have not heard of any resulting issues?
 
Which of the many penetrating corrosion inhibitor products has a homebuilder-friendly application system? Last time I looked the products were reasonable and the spray equipment was expensive.

BTW, I'd cheerfully build an application wand if someone had plans.
 
Thanks for all the replies. It is good to know there are real corrosion protection options for QB builders.
Andy Hill - My fuselage has been sitting for 4 years or so inland from the coast, in a garage where light condensation is a problem in winter. I noticed spots of light surface corrosion through the wash primer about 6 months ago, but only in certain places.. It looked to me as if the preparation or primer application could have been the fault, not the actual product, as the rest of the fuselage was unaffected. It was still enough to make me want to protect the airframe further though, especially in the areas where future inspection will be difficult.
Thanks again,
Hugh
 
DanH said:
Which of the many penetrating corrosion inhibitor products has a homebuilder-friendly application system? Last time I looked the products were reasonable and the spray equipment was expensive.

BTW, I'd cheerfully build an application wand if someone had plans.
Click to expand...

Dan,

Back when I had my Cherokee, my A&P AI sprayed its innards with ACF 50. It had spent some time in Florida and was starting to develop some mild skin corrosion in the wings. After getting sticker shock from "official" applicator rig prices, we just took a 2 gallon pump up garden sprayer and attached a piece of aluminum tubing to the hand wand, replacing the plastic stinger that was there with one that was long enough to reach from the end of the wing tip to the root. He pinched the end of the tubing closed and drilled some very small holes around the periphery of the tubing. If I remember right he drilled two or three "rings" of holes perhaps 6" to 8" between rings out near the end of the tubing. You might even be able to use the nozzle on the end of the wand that comes with the sprayer and just extend the tubing with short fuel line section splices. His worked great, shooting a very fine mist. I'm not sure if this would work with all anti-corrosion fluids as I'm not familiar with their viscosity. Sorry, no pictures of the rig we used but it was down right simple. Other options might be to do something similar with one of these:

http://shop.advanceautoparts.com/buy/products/141304-siphon-spray-blow-gun-kit-by-milton-industries-part-mils157-air-tools.html

http://www.grainger.com/Grainger/GUARDAIR-Syphon-Spray-Gun-3MNT5

http://www.use-enco.com/1/1/41957-79sg012-guard-air-pistol-type-lever-w-6ft-siphon-tube-aluminum-blow-guns.html

This page has a pic of a paint spray gun type rig near the bottm:

http://www.derbyaeroclub.com/ACF50Anticorrosion.html

The ACF 50 works well, but it penetrates and weeps from wing and fuse skin joints for years. I had to wash or wipe the seems down often to keep it looking good.
 
You must log in or register to reply here.