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AEC 9005

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nuckolls.bob(at)aeroelect
Guest

Posted: Sat Oct 01, 2016 2:34 pm Post subject: AEC 9005

At 04:45 PM 10/1/2016, you wrote:

  	  Quote: 	
		  Thanks Bob! What kind of product do you use for the coating?

 I can think of some other projects that can benefit from that.

 	




   The 'in-crowd' uses a mil-spec polyurethane

   coating specifically crafted for etched circuit

   boards. In the 'po-boy' world, a clear poly

   by Krylon, Deft, et. als. will suffice.



   You can get it at any hardware or big-box

   store. Here's one example.



  http://tinyurl.com/gpsdkh4



   It doesn't need to be this specific product.

   Any of the clear poly's are fine. You need

   to mask off connectors. Getting that stuff

   into a d-sub is  . . . well . . . you get

   the picture.



   I clean a board of solder-flux and other

   guck with the spray from a can of carburetor/

   air intake cleaner (a close cousin to lacquer

   thinner). Walmart sells a can of it for a

   couple of bucks . . . I buy this stuff by

   the case for a host of cleaning tasks.



  http://tinyurl.com/h8ppujv



   Walmart may have the polyurethane too . . .



 

   Bob . . .

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hlbartel(at)pld.com
Guest

Posted: Sat Oct 01, 2016 3:50 pm Post subject: AEC 9005

Bob,

 

I like your input about using the carburetor cleaner, but I have acquired an allergy to that product.  I have found a product from CRC Industries that I like very well, but have not yet used it on circuit boards for cleaning.  Here is a link to the product, and all our local auto parts stores stock it.

 

http://www.crcindustries.com/ei/product_detail.aspx?id=05018

 

What would be your take on using it instead of carburetor cleaner for that purpose?

 

 

Thanks,

Harry

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nuckolls.bob(at)aeroelect
Guest

Posted: Sat Oct 01, 2016 6:39 pm Post subject: AEC 9005

At 06:46 PM 10/1/2016, you wrote:



  	  Quote: 	
		  Bob,



  



 I like your input about using the carburetor cleaner, but I have acquired an allergy to that product.  I have found a product from CRC Industries that I like very well, but have not yet used it on circuit boards for cleaning.  Here is a link to the product, and all our local auto parts stores stock it.



  



  http://www.crcindustries.com/ei/product_detail.aspx?id=05018



  



 What would be your take on using it instead of carburetor cleaner for that purpose? 	


   High order probability of success. When

   cleaning a newly assembled board, products

   of assembly (flux mostly) needs to be removed

   before coating. Depending on type of flux, it

   MIGHT just come off with water. I used to assemble

   my products with a water soluble flux and run

   finished boards through he dishwasher.



   But without knowing the specifics of what

   ever solder flux you have (or perhaps other

   contaminants acquired with service/age like

   Mr. Yates board), a more universal solvent

   can be considered. 91% isopropyl alcohol from

   Walmart is often sufficient but it doesn't come

   in a handy spray can. Mild solvents like paint

   thinner/toluene/naptha work but again, not so handily

   packaged. The carb cleaner has proven suitable

   to my tasks for decades. I flush generously and

   immediately blow dry with an air hose.



   The biggest risk for solvent selection is

   picking something too aggressive . . . MEK

   comes to mind. Does a NICE job of getting

   flux off. Also removes  paint stripes

   from resistors and melts some of the lesser-

   robust plastic parts.



   An on-purpose board cleaner . . . 

   especially from the likes of CRC is very

   likely a well proven product.



   



 

 

   Bob . . .

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