I don't think Imron (DuPont) is the highest in chemical resistance. Fine scratch and UV resistance, but I think a soak in acetone or maybe even MEK will gradually loosen it. For boats, Awlgrip is more chemically resistant.
Anyway, for aviation, I believe Sterling Paints is the winner. Call a rep and a few bucketfulls of dollars and they should be able to fix you up.
Wayne
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Dwight Mattix
Sent: Wednesday, August 23, 2017 7:23 AM
To: [log in to unmask]
Subject: Re: [TN] Epoxy Paint
Are polyurethane enamels (e.g. Imron) still a thing in common use? Nasty (and beautiful).
Long time since I exercised my A&P license or spent time in the paint hanger. Need to check in with some Aviation maintenance type buddies see what they're using.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Douglas Pauls
Sent: Wednesday, August 23, 2017 6:16 AM
To: [log in to unmask]
Subject: Re: [TN] Epoxy Paint
Graham,
Those of us in the aerospace world have to live with two documents, the FAA
DO-160 and an equivalent mil spec (either 883 or 810). Both have what is called a fluid susceptibility test section. Depending on the customer, there is a wide range of fluids that the material must be resistant to.
Our avionics assemblies can be anywhere in the plane, cockpit, avionics bay, luggage bay, under the toilets, in the wings, up in the tail, outside the aircraft. Can be anywhere. For hydraulic fluid, yes we are primarily concerned about drips and leaks from hydraulic lines. Some customers what the paints and coatings to be "bulletproof" and know that if a material can stand up to hydraulic fluid, it will stand up to everything else.
Doug Pauls
Principal Materials and Process Engineer Rockwell Collins
On Wed, Aug 23, 2017 at 5:44 AM, Graham Naisbitt < [log in to unmask]> wrote:
> Hi Doug
>
> I recall being asked the question regarding our (then) coatings and
> their ability to resist Skydrol.
>
> When I enquired why, I was informed that the electronic circuits were
> in the cockpit, and they were worried about the effects on them if
> Skydrol were to “leak” onto them.
>
> I had to ask why this would be important given that the pilot had
> already ejected to safety if that happened.
>
> I don’t believe that anyone found a Skydrol resistant paint or coating
> but can’t Eastman help you?
>
> ATB - Graham
>
> > On 21 Aug 2017, at 22:06, Douglas Pauls
> > <[log in to unmask]>
> wrote:
> >
> > Good afternoon all,
> >
> > Do any of you know a good epoxy-based paint that is resistant to
> Skydrol, a
> > nasty phosphate based hydraulic fluid?
> >
> > Doug Pauls
> > Principal Materials and Process Engineer Rockwell Collins
>
>
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