Date: Tue, 20 Nov 2012 13:25:09 -0800
Reply-To: Don Hanson <dhanson928@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Don Hanson <dhanson928@GMAIL.COM>
Subject: Re: '90 syncro with seam rust
In-Reply-To: <CAB2Rwfh3nkJSKP49SB4pBCBTKwfP2rPsCOUo1dVaq514t2komg@mail.gmail.com>
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Isn't it true that if you completely seal off rust it can no longer
progress? So if a rusty spot is only on one side of a sheet metal
panel, or both facing sides of two panels and the back side of the metal is
still solid....and you can seal off that rust to isolate it from
oxygen...the rust should be finished, no? Rust = oxidation of iron, no?
No O2=no more rust? I think that is how some of the rust treatment
products work...by combining with the existing rust on the surface and
creating an air tight barrier coat.
If I had rust in MY van (which thankfully I do not) I would use a two
part epoxy, probably WEST system because that is what I am familiar with,
and infuse the seam with enough epoxy to completely exclude the atmosphere
and any water from that seam...
It would seam to me that welding panels would alter the adjacent metal
structure and make that section more prone to rust.....
I am no expert on rusty cars but I have worked in the marine industry
and I know that even plain steel fasteners, if totally encapsulated in
epoxy, do not rust, even in a salt water immersed environment.
Don Hanson
On Tue, Nov 20, 2012 at 11:55 AM, neil n <musomuso@gmail.com> wrote:
> The video you saw may have been mine.
>
> I recently finished treating a seam. (my first time doing this job)
> The caulking had failed, water just "poured" with a water hose to the
> seam. As an aside, this area of the van appears to have been
> "professionally" repaired. In hindsight, I suspect the caulking
> material was either the wrong stuff, or poorly applied. I don't see
> signs of seam failure elsewhere.
>
> Though there was no visible signs of rust inside or out, once I ran a
> piece of thin emery paper along lower portion of seam, I could see
> signs of rust on the paper.
>
> I guess my point is this; even with what appeared to be a rust free
> seam, I ended up finding signs of rust.
>
> FWIW, after cleaning and prepping the seam, I used a syringe with a
> piece of electrical shrink wrap attached (as a nozzle) to inject rust
> convertor as deeply as possible into the seam, then painted, caulked
> etc. I used Proform 211
> http://www.proformproducts.com/en/products/info/?product=1032&category=24
> though it was a little tricky to shape.
>
> Neil.
>
> On Tue, Nov 20, 2012 at 10:41 AM, Liberte, Joel <joel.liberte@hp.com>
> wrote:
>
> > Thanks all for the responses, while I'm lucky I don't have the kitchen
> to deal with I have pulled the panels and indeedy there is rust on the
> inside seams, had the same experience as someone recently filmed with water
> coming through when raining.
> >
>
>
>
>
> --
> Neil n
>
> 65 kb image Myford Ready For Assembly http://tinyurl.com/64sx4rp
>
> '88 Slate Blue Westy to be named.
>
> '81 VanaJetta 2.0 "Jaco" http://tubaneil.googlepages.com/
>
> Vanagon VAG Gas I4/VR Swap Google Group:
>
>
> http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-engines
>
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