Matronics Email Lists :: View topic

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

aluminium alloys

Matronics Email Lists Forum Index -> Europa-List

View previous topic :: View next topic

Author Message

jan_de_jong(at)casema.nl
Guest

Posted: Sun Mar 29, 2009 1:50 pm Post subject: aluminium alloys

To those who have gone before.



 From appearance the following pieces seem to be made of a similar type 

of aluminium:

OR1, CS01, CS02, CS03, CS07, LG08, LG02, maybe a few more.

By my guess the type of aluminium is quite corrosion resistant.

My question: does it pay to go through alodining and painting with these 

pieces?

How about the exposed parts: OR1 and LG08, LG02?



The Netherlands share the UK climate...



I would be grateful for some definite opinions.



Regards,

Jan de Jong

#461

- The Matronics Europa-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Europa-List

frans(at)paardnatuurlijk.
Guest

Posted: Mon Mar 30, 2009 12:19 am Post subject: aluminium alloys

Jan de Jong wrote:

 	  Quote: 	
		   From appearance the following pieces seem to be made of a similar type

 of aluminium:

 OR1, CS01, CS02, CS03, CS07, LG08, LG02, maybe a few more.

 By my guess the type of aluminium is quite corrosion resistant.


	


I bought my kit unstarted from someone who has had it around for 5 years

or so. I have the kit already a year, this winter practially all of the

aluminium was already assembled, and kept together with the airplane in

my unheated shed with leaking roof. There is a little bit of surface

rust on the landing gear legs (tri-gear) but the aluminium shows no

signs of corrosion at all. Keep in mind that the aluminium has already

been stored for more than 5 years without any protection. It doesn't

seem to corrode by itself. I live in the Netherlands just like you.



After reading some information, and realizing that, when you later

bonding the aluminium in place, you are actually bonding the

protection-layer to the airplane, rather than the bare aluminium (which

is not bad IF the treatment was applied properly, but this would become

another variable to depend your life on), I decided to keep the

aluminium untreated. Treatment always fails at the weakest points, where

bolts go through, and if you really want to make the airplane corrosion

proof, you have to treat every single nut, washer and bolt, hinge, etc.

and keep an eye at all moving parts where the treatment will wear away

(like the inside of the hinges). Also, part of the aluminium was already

installed by the factory (the inboard flap attachment plate for

instance), and it doesn't make sense to have some critical parts

unprotected and going great lengths to protect a few others.



Instead of all this, I plan on keeping the Europa at home. I will build

a small insulated hangar, and install some demoistering device. I also

thought about installing a few resistors at strategical points in the

fuselage and wings, and keep these powered during storage so the small

amount of heat will direct moisure away, but given the fact that I found

no signs of corrosion even after this winters very bad storage, I

skipped this idea.



I'm not a corrosion expert, just my 2 cents.



-- 

Frans Veldman

- The Matronics Europa-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Europa-List

jan_de_jong(at)casema.nl
Guest

Posted: Mon Mar 30, 2009 1:03 am Post subject: aluminium alloys

Hi Carl,



I do the alodining and epoxy painting on all aluminium bits and with 

particular fanaticism where aluminium is bonded into wings and flaps. 

Worrysome that the treatment  is possibly insufficient.

I was just wondering if I could reasonably make an exception for some 

parts like the CS0x (and maybe OR1, LG08, LG02) that to my untrained eye 

seem to not need it.



Regards,

Jan



Carl Pattinson wrote:

 	  Quote: 	
		   

 <carl(at)flyers.freeserve.co.uk>



 Corrosion protection is I would say essentail with the alloy 

 components. Alodine and paint is the home option - alternately anodising.



 You will find that the flap points bonded into the wings will start to 

 corrode at the bond line leading to possible cracks later on. 

 Replacing these on a finished Europa is a job I would rather not 

 contemplate.



 The paint we used (and we primed with Alodine) is starting to chip and 

 there is evidence of corrosion (aircraft has been flying for 5 years. 

 These are treated routinely with waxoyl to keep out the moisture (not 

 pretty but effective) and then periodically cleaned and painted. 

 Alternatively ACF50 corrosion treatment.



 The airflow in these areas will soon strip away any chipped paint 

 exposing the alloy underneath - it doesent take long for corrosion to 

 set in.

- The Matronics Europa-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Europa-List

jan_de_jong(at)casema.nl
Guest

Posted: Mon Mar 30, 2009 1:21 am Post subject: aluminium alloys

Frans,



I follow your reasoning, but having the choice did the alodining and 

epoxy painting on all bare aluminium sofar. You are right about the 

preinstalled wing flap attachments. There may be a virtue though in 

limiting the number of vulnerable spots that need special attention.



I definitely plan to keep the Europa ventilated under a roof as well.



Regards,

Jan

- The Matronics Europa-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Europa-List

Display posts from previous:

	Matronics Email Lists Forum Index -> Europa-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum