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Alodine Question

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Kevin Bonds

Joined: 09 Jan 2006
Posts: 171
Location: Nashville, Tn

Posted: Fri Jun 23, 2006 1:16 pm Post subject: Alodine Question

I have alodined some of my parts with the gold colored alodine. After final rinsing for several minutes I noticed that while drying them with a white cotton rag, I get a tan/gold residue left behind on the white cotton i.e. the alodine seems to come off. Surely it is not. Perhaps, just the dye?  Is this normal? Should I not wipe after drying?



Kevin Bonds

http://home.comcast.net/~kevinbonds

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_________________
KevinBonds
Nashville, TN
Plans-building Zenith CH601XL w/Corvair Power
http://home.comcast.net/~kevinbonds

messydeer

Joined: 13 Feb 2006
Posts: 214
Location: Bellingham, WA

Posted: Fri Jun 23, 2006 5:45 pm Post subject: Re: Alodine Question

Kevin:



Sounds like you followed directions according to the Alodine literature. I did the same thing you did, got the same result. So I asked Henkel. Here's their response (read from bottom up, duh!):



To: messydeer(at)yahoo.com 

Subject: Re: Alodine and Alumiprep 

From: david.tomlinson(at)us.henkel.com  Add to Address Book  Add Mobile Alert  

Date: Tue, 14 Mar 2006 13:12:32 -0800 

    



Sorry, I'm brain dead.  I thought you were talking centigrade. 



What I meant to say was:  run Alodine at room temp 70F +/- 10F.  50F is too cold for Alodine. 



I stand by the air dry program, or heated air below 140F--no rags!  Use a hair dryer if you are in a hurry.



Yes, you can paint anytime the parts are dry--I said avoid physical contact, touching, rubbing, wiping with rags.  Paint withing 24 hours. 



Good luck! 



DAVID TOMLINSON

Account Executive

Henkel Aerospace

Cell (562)972-0844

david.tomlinson(at)us.henkel.com 

 Dan Morehouse <messydeer(at)yahoo.com> 

03/14/2006 12:57 PM 



         

        To:        david.tomlinson(at)us.henkel.com 

        cc:         

        Subject:        Re: Alodine and Alumiprep 



Thanks, David. 

  

20-30F? So instead of diluting with water, you throw ice in it? Here's what the tech data sheet says: 

  

Operation and Control: 

Time 2 to 5 minutes 

Temperature Ambient to 100Â° Fahrenheit 

  

  

And here's what it says about drying and painting afterwards: 

  

As an aid to drying, heating the treated part, blowing off with clean, dry, 

filtered, forced air or gently wiping with a dry, clean rag will lessen the 

time required. Do not allow the aluminum metal temperature to exceed 140 

Fahrenheit. 

Paint soon after the work is dry in order to prevent soils or oxidation from 

recontaminating the prepared metal surface. 

  

  

I painted immediatley after it dried, as suggested. Are you saying I should wait longer? 

  

Thanks, 

Dan 

david.tomlinson(at)us.henkel.com wrote: 



Dan: 



The Alumiprep procedure is correct, and you may reuse the solution. 



The Alodine may be too warm, I would recommend 20-30F.  1-5 minutes to achieve desired color.  After Alodine, rinse well and drip or air blow dry.  Do not wipe the parts dry!  Alodine coatings are gelatinous for several hours initially.  Minimize contact for about 4 hours minimum, 8 is better. 

Also, stout plastic buckets might be better.  You can hang your parts in with aluminum wires. 



DAVID TOMLINSON

Account Executive

Henkel Aerospace

Cell (562)972-0844

david.tomlinson(at)us.henkel.com 



 Dan Morehouse <messydeer(at)yahoo.com> 

03/13/2006 03:57 PM          

       To:        bill.wittke(at)us.henkel.com 

       cc:        (bcc: David Tomlinson/US/Americas/HENKEL) 

       Subject:        Alodine and Alumiprep 





Hello: 

 

I'm using Alumiprep and Alodine on 6061-T6. I'm aware of the safety precautions needed, but have a few questions about my application. 

 

I mixed the Alumiprep according to immersion directions, 1:3 with water, I believe. My parts were small, so I double bagged gallon ziplock freezer bags and dropped the parts in. The parts had been scoured with maroon scotchbrite 7447 and then cleaned with a solvent. I used Naphtha, just because it was there. I would normally use acetone. 

 

The parts fizzed and I left them in for maybe 5 minutes. Is this about right? Solution temerature was maybe 55F. Rinsed them with water and immeresed them into Alodine 1201 1:2 with water. Solution temp was maybe 50F. After 5 minutes, I removed them and rinsed with water. I read in the tech manual that using a cloth to dry was okay. But that seemed to take off the Alodine, so I stopped immediately. Could you explain this please? 

 

Also, can I reuse the Alumiprep? I know I can do that with the Alodine. 

 

Thanks, 

Dan

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_________________
Dan

Kevin Bonds

Joined: 09 Jan 2006
Posts: 171
Location: Nashville, Tn

Posted: Fri Jun 23, 2006 7:46 pm Post subject: Alodine Question

Thanks David. Your info was a big help. That 20-30F thing freaked me out till I read further.  

   

Kevin Bonds  

   

Nashville TN  

   

601XL Corvair powered; Plans building.  

   

Empennage done; working on wings and engine.  

   

http://home.comcast.net/~kevinbonds  

   

   

   

do not archive DO NOT ARCHIVE   

   

   

   

--

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_________________
KevinBonds
Nashville, TN
Plans-building Zenith CH601XL w/Corvair Power
http://home.comcast.net/~kevinbonds

messydeer

Joined: 13 Feb 2006
Posts: 214
Location: Bellingham, WA

Posted: Fri Jun 23, 2006 9:21 pm Post subject: Re: Alodine Question

You're welcome. It's sorta hard to figure out, but I'm Dan. David is the techie from Henkel.



Ciao,

Dan

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Dan

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