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Landing gear frame

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gregoryf.flyboy(at)comcas
Guest

Posted: Fri Jun 26, 2009 9:53 pm Post 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][b]

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ami(at)mcfadyean.freeserv
Guest

Posted: Sat Jun 27, 2009 8:09 am Post subject: 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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gregoryf.flyboy(at)comcas
Guest

Posted: Sat Jun 27, 2009 3:20 pm Post subject: 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]    

---

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gregoryf.flyboy(at)comcas
Guest

Posted: Sat Jun 27, 2009 3:36 pm Post subject: Landing gear frame

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

Posted: Sun Jun 28, 2009 8:25 am Post subject: Landing gear frame

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: 	
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       [quote][b]

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carl(at)flyers.freeserve.
Guest

Posted: Sun Jun 28, 2009 10:06 am Post subject: Landing gear frame

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

Posted: Sun Jun 28, 2009 12:50 pm Post subject: Landing gear frame

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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