Hi Bob,
You don't seem to be having much luck at the moment... Just one thought on
your suggestion, in my expereince epoxy doesn't adhere to stainless steel,
so relying on a mechanical bond might be unsatisfactory. Maybe Andy Draper
could offer his comments...
Brian Huchinson
hutch@hangarbout.fsnet.co.uk
----- Original Message -----
From: "Bob Harrison" <ptag.dev@ukonline.co.uk>
Subject: Wing and Flap bonded brackets.
> Hi! All.
> I was on the point of this e-mail anyway but today received the latest
> Europa News letter and there happens to be an article in it about
corrosion
> protection.
> I have just been tidying up my wing "FURNITURE" because now having the
wing
> dolly I was able to get them into the workshop under a decent light.
> I found, much to my disappointment, a small amount of corrosion on the
flap
> brackets under the paint, evident by the paint showing signs of blisters.
> When preparing the brackets I etched them with phosphoric acid diluted 5:1
> washed off well
> dried and then coated with Etch Primer (D360-1 with Toluene and Xylene)
> Mixed 1:1 with Etch catalyst (D360-1) Then two coats of Plasti-kote metal
> primer grey undercoat and at least two coats of white Plasti-kote gloss.
> The oxide blistering the paint was white but close to the good metal it
was
> black. Has anyone any suggestions as to a) What I did wrong? and b) What
> action to take now? (as a temporary stop gap I have cleaned them back to
> white metal recoated them with the etch primer and repainted them with
the
> plasti-kote .)
> c)Bearing in mind the invasive surgery needed some time in the future at
> what cost structurally and minimal weight would it have been to make these
> "captive" parts in stainless?
> Builders in the stage of needing to take corrosive protection action need
to
> be extremely careful what "tune they play"
>
> Regards
> Bob Harrison G-PTAG
>
>
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