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corrosion in the tube

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cristalclear13

Joined: 19 Sep 2007
Posts: 363
Location: Southeast Georgia

Posted: Sat Nov 29, 2008 8:57 pm Post subject: corrosion in the tube

I'm seeing some rust on the inside bottom backside of my tube.  



I can't see very far into the tube.  Does anyone have any ideas of a way to inspect the entire inside of the tube?



And what's a good way to treat the rust in there?

_________________
Cristal Waters
Kolb Mark II Twinstar Rotax 503 DCSI Sept 2007 - sold Sept 2012
Private Pilot Aug 2008
ELSA Repairman for N193Y April 2008
Rotax 2 stroke maintenance April 2009

slyck(at)frontiernet.net
Guest

Posted: Sun Nov 30, 2008 6:43 am Post subject: corrosion in the tube

Are you speaking of the tail boom tube?  Since it's aluminum the

rust is coming from something else.  Cables?  H-member?



Linseed oil reduced with lacquer thinner makes a pretty good  

preservative.

Careful around paint though.

BB



On 29, Nov 2008, at 11:57 PM, cristalclear13 wrote:



 	  Quote: 	
		   

 <cristalclearwaters(at)gmail.com>



 I'm seeing some rust on the inside bottom backside of my tube.



 I can't see very far into the tube.  Does anyone have any ideas of  

 a way to inspect the entire inside of the tube?



 And what's a good way to treat the rust in there?



 --------

 Cristal Waters

 Kolb Mark II Twinstar

 Rotax 503 DCSI





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p 16946#216946

jbhart(at)onlyinternet.ne
Guest

Posted: Sun Nov 30, 2008 8:12 am Post subject: corrosion in the tube

At 08:57 PM 11/29/08 -0800, you wrote:

 	  Quote: 	
		  

I'm seeing some rust on the inside bottom backside of my tube.  



I can't see very far into the tube.  Does anyone have any ideas of a way to inspect the entire inside of the tube?



And what's a good way to treat the rust in there?



--------


	




Cristal,



There are all kinds of rust killers on the market.  From the following site:



"DESCRIPTION: GEM RUST KILLER & Metal Prep is a balanced formula of 

phosphoric acid, wetting agent and extenders. It causes rust (iron oxide) to 

chemically change to iron phosphate, which turns the metal black. A coat of 

paint then attaches itself so closely to the metal that moisture and oxygen 

cannot attack the surface and results in a much longer lasting paint 

job."



http://www.gemrustkiller.com/



I don't know what phosphoric acid will do to aluminum.  You might want to 

test it first.  If you are talking about the tail end of the boom tube, you 

might consider periodically spraying it with WD40.  It will drive out the 

moisture and prevent further corrosion.



Also there is a electrolysis problem between the steel ring around the 

aluminum tube.  If you can convert the iron oxide to iron phosphate, it may 

provide a stronger barrier to the dissimilar metal problem.



Jack B. Hart FF004

Winchester, IN

williamtsullivan(at)att.n
Guest

Posted: Mon Dec 01, 2008 4:38 am Post subject: corrosion in the tube

Jack- I was looking at your web site, and it looks like your main fuselage tube is bare aluminum.  Is it coated with anything?  What did you do about electrolysis at the contact points with steel, front and rear?  How do you keep it shiny, wax?

  

                                           Bill Sullivan

                                           Windsor Locks, Ct.

 [quote][b]

jbhart(at)onlyinternet.ne
Guest

Posted: Mon Dec 01, 2008 7:06 am Post subject: corrosion in the tube

Date: Mon, 1 Dec 2008 04:38:23 -0800 (PST)

From: william sullivan <williamtsullivan(at)att.net>

 	  Quote: 	

Jack- I was looking at your web site, and it looks like your main fuselage 

tube is bare aluminum.  Is it coated with anything?  What did you do about 

electrolysis at the contact points with steel, front and rear?  How do you 

keep it shiny, wax?

 	  Quote: 	

Bill,

The fuselage tube is not coated. I don't worry too much about electorlysis, 

as the FireFly is always hangared.  I do het the joints with a little spray 

WD 40 a couple times a the year.  I polish the tube tube one time a year.  I 

use automotive aluminum wheel polish on a folded paper towel followed by an 

old soft cotton tee shirt.  It looks better in the photo that it realy is.

Jack B. Hart FF004

Winchester, IN

cristalclear13

Joined: 19 Sep 2007
Posts: 363
Location: Southeast Georgia

Posted: Mon Dec 01, 2008 8:39 pm Post subject: Re: corrosion in the tube

We got the corrosion cleaned up fairly easily....what wasn't easy was digging the mouse nest out from the middle of the boom tube.



Does anyone put anything on the ends of their boom tubes to keep the critters out?

_________________
Cristal Waters
Kolb Mark II Twinstar Rotax 503 DCSI Sept 2007 - sold Sept 2012
Private Pilot Aug 2008
ELSA Repairman for N193Y April 2008
Rotax 2 stroke maintenance April 2009

by0ung(at)brigham.net
Guest

Posted: Tue Dec 02, 2008 7:13 am Post subject: corrosion in the tube

Cristal

  I have glued in a piece of fabric about 6 inches in from the end.  Then

had to cut small slits in the fabric to let the cables pass through.  My

purpose for doing this was not to keep critters out,,,  it was to keep the

air in the cabin from being sucked out the back.  This way I can keep a bit

warmer in the winter.



Boyd Young

Kolb MKIIIC



 	  Quote: 	
		  >>>>>>>>>>>>>>>>>


	


Does anyone put anything on the ends of their boom tubes to keep the

critters out?



--------

Cristal Waters

John Hauck

Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)

Posted: Tue Dec 02, 2008 7:38 am Post subject: corrosion in the tube

> We got the corrosion cleaned up fairly easily....what wasn't easy was 

digging the mouse nest out from the middle of the boom tube.

 	  Quote: 	
		  

 Does anyone put anything on the ends of their boom tubes to keep the 

 critters out?



 --------

 Cristal Waters


	


Cristal:



Serious problem, rodents.



My main concern is urine.  It is very corrosive, especially to aluminum.



I don't know of anyway to check the tailboom tube to insure it has not been 

corroded by rodent urine.  Very difficult to see using a flashlight and 

peeking in the end of the tube.



Several years ago my mkIII was attacked by rodents, rats and/or chipmonks. 

Major damage was caused by chewing wire  bundles, kevlar parachute bridals, 

seats, even plastic hydraulic brake lines filled with fluid.  They's chew up 

any thing to build a nest.



I haven't had a problem with them for some time now.  I keep a couple 

Valerian capsules in the tail boom and floor of the cockpit.  Valerian is a 

herb you can buy at Walmart.



Hope the neighbors have not moved in while I have been gone the last two 

months.



john h

mkIII

Payson, AZ

_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama

aslsa.rng(at)gmail.com
Guest

Posted: Tue Dec 02, 2008 7:45 am Post subject: corrosion in the tube

John, a bit off the corrosion question, but I'm curious about the valerian. Does it affect mice in the same way it affects cats?



Rick



On Tue, Dec 2, 2008 at 9:38 AM, John Hauck <jhauck(at)elmore.rr.com (jhauck(at)elmore.rr.com)> wrote:

 [quote]--> Kolb-List message posted by: "John Hauck" <jhauck(at)elmore.rr.com (jhauck(at)elmore.rr.com)>

  

 

 > We got the corrosion cleaned up fairly easily....what wasn't easy was digging the mouse nest out from the middle of the boom tube.

  	  Quote: 	
		   

 Does anyone put anything on the ends of their boom tubes to keep the critters out?

 

 --------

 Cristal Waters

 	
 

 Cristal:

 

 Serious problem, rodents.

 

 My main concern is urine.  It is very corrosive, especially to aluminum.

 

 I don't know of anyway to check the tailboom tube to insure it has not been corroded by rodent urine.  Very difficult to see using a flashlight and peeking in the end of the tube.

 

 Several years ago my mkIII was attacked by rodents, rats and/or chipmonks. Major damage was caused by chewing wire  bundles, kevlar parachute bridals, seats, even plastic hydraulic brake lines filled with fluid.  They's chew up any thing to build a nest.

  

 I haven't had a problem with them for some time now.  I keep a couple Valerian capsules in the tail boom and floor of the cockpit.  Valerian is a herb you can buy at Walmart.

 

 Hope the neighbors have not moved in while I have been gone the last two months.

 

 john h

 mkIII

 Payson, AZ 

 

 

 

 

 [b]

John Hauck

Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)

Posted: Tue Dec 02, 2008 7:57 am Post subject: corrosion in the tube

Rick:

  

 Don't know about cats, but when I was having my  rodent problem I discovered through research on the internet that Valerian would  act as a repellent.  It stinks!

  

 john h

 mkIII

 [quote]    

John, a bit off the corrosion    question, but I'm curious about the valerian. Does it affect mice in the same    way it affects cats?   



   Rick

 

[b]

_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama

cristalclear13

Joined: 19 Sep 2007
Posts: 363
Location: Southeast Georgia

Posted: Tue Dec 02, 2008 8:40 am Post subject: Re: corrosion in the tube

 	  John Hauck wrote: 	
		  



Hope the neighbors have not moved in while I have been gone the last two 

months.



	




I hope not too.  We also have a LOT of spiders in the hanger and I found where a couple have been making their nests/laying their eggs/whatever you call it in tiny crevices.  I don't know if they cause much corrosion, but one had a webby mess inside the tube where my tailwheel attaches.

_________________
Cristal Waters
Kolb Mark II Twinstar Rotax 503 DCSI Sept 2007 - sold Sept 2012
Private Pilot Aug 2008
ELSA Repairman for N193Y April 2008
Rotax 2 stroke maintenance April 2009

aslsa.rng(at)gmail.com
Guest

Posted: Tue Dec 02, 2008 9:08 am Post subject: corrosion in the tube

Interesting. In cats, if catnip is analogous to kittie pot, valerian is kitty LSD. Hope the mice don't figure that one out or the hangar cat is in for a high old time.



Rick



 On Tue, Dec 2, 2008 at 9:56 AM, John Hauck <jhauck(at)elmore.rr.com (jhauck(at)elmore.rr.com)> wrote:

 	  Quote: 	
		          Rick:

  

 Don't know about cats, but when I was having my  rodent problem I discovered through research on the internet that Valerian would  act as a repellent.  It stinks!

  

 john h

 mkIII

  	  Quote: 	
		      

John, a bit off the corrosion    question, but I'm curious about the valerian. Does it affect mice in the same    way it affects cats?   



   Rick

 

	
   

[/b] 	


[b]

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