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What's best to use to clean mild surface corrosion on T6061-T6?

Posted By:
Toby Tiffany
Young Eagles Pilot or VolunteerHomebuilder or Craftsman
1
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0
#1 Posted: 11/20/2010 09:01:55

I need help from the group.  I am building a Zenith CH701 and I have noticed that my completed rudder which has been sitting in my workshop for some time has developed just a very minor bit of surface corrosion.  What can I use to clean / remove the corrosion?

Any ideas are welcome.  Thanks.



Chuck Drake
Warbirds of America MemberYoung Eagles Pilot or VolunteerHomebuilder or CraftsmanAirVenture Volunteer
74
Posts
15
#2 Posted: 11/21/2010 18:31:43 Modified: 11/21/2010 18:37:16

Do you have any pictures and are you going to paint or polish your aircraft?  How are you storing your completed Components?  Is the corrosion next to a steel part on your project or a dissimilar metal ?

 



Joseph Aloof
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0
#3 Posted: 11/25/2010 08:04:37
Toby Tiffany wrote:

 

I need help from the group.  I am building a Zenith CH701 and I have noticed that my completed rudder which has been sitting in my workshop for some time has developed just a very minor bit of surface corrosion.  What can I use to clean / remove the corrosion?

Any ideas are welcome.  Thanks.

 

HI TOBY ITS  HAPPENING TO MY 701 ASWELL I HAVE THE WHOLE PLANE UNDER A TRAILER BUT THE ROOF PANELS I USED HAD SOME SURFACE RUST AND SOME CORROSION WHEN IT RAINS  WATER SETTLES ON THE PLANE AND LEAVES CORROSION SCOTCH BRIGHT PAD HELPS BUT STILL LEaves some pits if you find A CLEANER LET ME KNOW ASWELL THANX   JOE



Bob Gish
Homebuilder or Craftsman
68
Posts
14
#4 Posted: 11/30/2010 11:48:55

These parts are obviously not alclad. You should probably start prepping with alodine and priming these parts when they are finished.

As for cleaning you are on the right track with the scotchbright, you might also try a product called alumaprep, then alodine and prime immediately after alumaprep treatment. Be sure you thuroughly remove all of the alumaprep from your parts and don't let it get into any faying surfaces since it is a strong acid that can actually eat your parts if residue is left behind. All that being said it makes a great corrosion remover and really aids the alodine process.



Lars Gleitsmann
Vintage Aircraft Association MemberYoung Eagles Pilot or Volunteer
18
Posts
5
#5 Posted: 12/5/2010 01:10:06 Modified: 12/5/2010 01:13:40

Hi,

Bob is sure RIGHT, that stuff he named works and I have used it A LOT.

BUT one word of Caution ! These chemicals are highly dangerous acids and the vapor from them can kill you, so ONLY use in VERY well ventilated places! If You can smell it while you use it its allready potentially dangerous. Its great working stuff, but do use caution and wash it off the plane etc with LOTS and LOTS of warm water !!!

Do not try these in a basement or closed garage....

And the stuff has limited shelf-life, use it after you buy it and do not leave it sit for month and years, it looses its "bite" and all effectiveness.... I had to "do" all of my Do27, gezz it was nasty work....

AND make sure You NEVER ever use Steel brushes or steel wool on your sheetmetal....also there are steel brushes 4 sale that are brass-coated and look like good brass-brushes, do not fall for That trap, its way bad.

Regards,

Lars

http://www.eaa42.org/planesa.html#lars

 

also, but off topic here:

http://avgasforak.blogspot.com/2010/04/alaskan-aviation-industry-against-epa.html

http://alaskadispatch.com/blogs/bush-pilot/6028-an-alaska-pilot-speaks-out-against-the-epa-avgas-ban