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gregoryf.flyboy(at)comcas Guest
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Posted: Fri Jun 26, 2009 9:53 pm Post subject: Landing gear frame |
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Europa Listers,
I have found some corrosion and rust in a few areas of my landing gear frame, so I will have to deal with that.
My first consideration is powder coating. It would be nice to powder coat over the gold-colored corrosion protection that is there, but based on previous listings, I may need to get down to bare metal to get it to stick.
If I simply scuff-sanded the frame, will anything stick to it? If anyone has painted or powder-coated over the original corrosion protection, and had results (negative or positive), let me know.
Thanks in advance,
Greg Fuchs
[quote][b]
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ami(at)mcfadyean.freeserv Guest
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Posted: Sat Jun 27, 2009 8:09 am Post subject: Landing gear frame |
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Powder coating looks nice but is poor at corrosion protection, commonly because of inadequate preparation.
For best protection, copy the way that steel bridges etc are repainted; which is not an activity that wants to be repeated often.
For this , epoxy-based primers are applied to clean, freshly abraded steel (usually grit blasted) at ambient humidity of <50%. Better still is an epoxy chromate primer eg the Polyfiber stuff. I used this on Kitfox weldments 20 years ago and there is no corrosion or paint lifting. Meanwhile, a nearby later Mark 4 of half the age needs its fabric stripping so that the flaking powder coated finish can be replaced; presuming that the corrosion under that is not too serious as to write-off the a/c.
Duncan McF
do not archive
its all been said before.
[quote] ---
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gregoryf.flyboy(at)comcas Guest
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Posted: Sat Jun 27, 2009 3:20 pm Post subject: Landing gear frame |
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Thanks Carl,
It looks like Hammerite might be an easy solution while being able to be painted right over rust. If it sticks to the corrosion protection that is there already, it would really be a treat.
Regards,
Greg
From: owner-europa-list-server(at)matronics.com [mailto:owner-europa-list-server(at)matronics.com] On Behalf Of Carl Pattinson
Sent: Saturday, June 27, 2009 1:36 AM
To: europa-list(at)matronics.com
Subject: Re: Landing gear frame
Hammerite sticks to just about anything or alternately Waxoyl (or similar) will keep steel parts free from corrosion.
[quote]
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gregoryf.flyboy(at)comcas Guest
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Posted: Sat Jun 27, 2009 3:36 pm Post subject: Landing gear frame |
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Thanks for the ideas, Duncan.
It looks like the epoxy based primers will need the same surface preparation as the powder coating.
Epoxy chromate primer does seem to be Cadillac.
I hope to not need Cadillac, I think something simple but effective is in the thought process –at least right now.
If I can find something that doesn’t require sand-blasting the whole part, that would be good.
its all been said before.
Yes, I think I have been too lazy to search hard enough. :0
Thanks for the help,
Greg
From: owner-europa-list-server(at)matronics.com [mailto:owner-europa-list-server(at)matronics.com] On Behalf Of Duncan & Ami McFadyean
Sent: Saturday, June 27, 2009 9:06 AM
To: europa-list(at)matronics.com
Subject: Re: Landing gear frame
Powder coating looks nice but is poor at corrosion protection, commonly because of inadequate preparation.
For best protection, copy the way that steel bridges etc are repainted; which is not an activity that wants to be repeated often.
For this , epoxy-based primers are applied to clean, freshly abraded steel (usually grit blasted) at ambient humidity of <50%. Better still is an epoxy chromate primer eg the Polyfiber stuff. I used this on Kitfox weldments 20 years ago and there is no corrosion or paint lifting. Meanwhile, a nearby later Mark 4 of half the age needs its fabric stripping so that the flaking powder coated finish can be replaced; presuming that the corrosion under that is not too serious as to write-off the a/c.
Duncan McF
do not archive
its all been said before.
[quote]
---
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nwcmc(at)tiscali.co.uk Guest
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Posted: Sun Jun 28, 2009 8:25 am Post subject: Landing gear frame |
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Make sure it has plenty of time to harden. Initially it is quite soft and is easily damaged.
Nigel Charles
-----Original Message-----
From: owner-europa-list-server(at)matronics.com [mailto:owner-europa-list-server(at)matronics.com] On Behalf Of Greg Fuchs
Sent: 28 June 2009 00:15
To: europa-list(at)matronics.com
Subject: RE: Re: Landing gear frame
Thanks Carl,
It looks like Hammerite might be an easy solution while being able to be painted right over rust. If it sticks to the corrosion protection that is there already, it would really be a treat.
Regards,
Greg
From: owner-europa-list-server(at)matronics.com [mailto:owner-europa-list-server(at)matronics.com] On Behalf Of Carl Pattinson
Sent: Saturday, June 27, 2009 1:36 AM
To: europa-list(at)matronics.com
Subject: Re: Landing gear frame
Hammerite sticks to just about anything or alternately Waxoyl (or similar) will keep steel parts free from corrosion.
Quote: |
----- Original Message -----
From: Greg Fuchs (gregoryf.flyboy(at)comcast.net)
To: europa-list(at)matronics.com (europa-list(at)matronics.com)
Sent: Saturday, June 27, 2009 6:46 AM
Subject: Landing gear frame
Europa Listers,
I have found some corrosion and rust in a few areas of my landing gear frame, so I will have to deal with that.
My first consideration is powder coating. It would be nice to powder coat over the gold-colored corrosion protection that is there, but based on previous listings, I may need to get down to bare metal to get it to stick.
If I simply scuff-sanded the frame, will anything stick to it? If anyone has painted or powder-coated over the original corrosion protection, and had results (negative or positive), let me know.
Thanks in advance,
Greg Fuchs Quote: | ==========="http://www.matronics.com/Navigator?Europa-List">http://www.matronics.com/Navigator?Europa-List==========="http://forums.matronics.com">http://forums.matronics.com==========="http://www.matronics.com/contribution">http://www.matronics.com/contribution========== |
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carl(at)flyers.freeserve. Guest
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Posted: Sun Jun 28, 2009 10:06 am Post subject: Landing gear frame |
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We had one of the early painted frames and corrosion set in fairly early. At the 5 year inspection we had to remove the frame and repaint it (in addition to the frame strengthening mod 72???). We stripped it down to the bare metal then metal prepped it (acid etch) and then Hammerite red primer and white topcoat.
Nigel is right when he says it is soft so you have to be very careful reinstalling it into the aircraft - it gets damaged when you refit the engine and ancillary bits but its easy enough to retouch the damaged areas. Once the engine has run once there is enough heat under the cowling to harden it off permanently.
Alternatively you can bake Hammerite in an oven and it hardens up quite rapidly this way but - not sure if the Mrs would approve of Hammerite flavoured Xmas turkey. However it would be fairly easy to make up an oven from foam blocks and a hairdryer - about an hour at 70 degrees centigrade would work.
[quote] ---
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gregoryf.flyboy(at)comcas Guest
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Posted: Sun Jun 28, 2009 12:50 pm Post subject: Landing gear frame |
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Ok, I have an oven that was donated that just needs to be wired and juiced up, for speeding up the Hammerite drying process.
Heres the potential plan:
<![if !supportLists]>1) <![endif]>sand blast the corrosion area (hard to get sandpaper to it, as it is between the tube and straight metal strengthening pieces), or alternatively let the Hammerite treat the rust directly (since it contains its own rust treatment).
<![if !supportLists]>2) <![endif]> Lightly Scotch Brite the other areas without rust (the ‘gold’ areas) and Hammerite it all, or alternatively no Scotch Brite and Hammerite it all.
<![if !supportLists]>3) <![endif]>Bake frame in the oven.
<![if !supportLists]>4) <![endif]>Cook turkey to soak up the oven fumes left over from the Hammerite
Is there anyone who has actually painted directly over the treated, gold colored surface? If so, was it successful, or were there any problems? I think it would be nice to have the backup layer of protection.
~G
We had one of the early painted frames and corrosion set in fairly early. At the 5 year inspection we had to remove the frame and repaint it (in addition to the frame strengthening mod 72???). We stripped it down to the bare metal then metal prepped it (acid etch) and then Hammerite red primer and white topcoat.
Nigel is right when he says it is soft so you have to be very careful reinstalling it into the aircraft - it gets damaged when you refit the engine and ancillary bits but its easy enough to retouch the damaged areas. Once the engine has run once there is enough heat under the cowling to harden it off permanently.
Alternatively you can bake Hammerite in an oven and it hardens up quite rapidly this way but - not sure if the Mrs would approve of Hammerite flavoured Xmas turkey. However it would be fairly easy to make up an oven from foam blocks and a hairdryer - about an hour at 70 degrees centigrade would work.
[quote]
Make sure it has plenty of time to harden. Initially it is quite soft and is easily damaged.
Nigel Charles
[b]
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