XPost: sci.electronics.repair   
      
   On Tue, 06 Feb 2018 16:43:38 -0800, Jeff Liebermann    
   wrote:   
      
   >On Tue, 06 Feb 2018 16:05:11 -0600, oldschool@tubes.com wrote:   
   >   
   >>Will Deoxit on a circuit board cause problems? In other words, is it   
   >>conductive if it's touching components?   
   >   
   >Think about it for a moment.  If a switch lube were conductive, and   
   >you sprayed it on the switch contacts, one might expect the switch   
   >lube to short out the switch.  That would make it a very bad switch   
   >lube.  Therefore, one might suspect that NOT shorting out the switch   
   >which Deoxit is trying to lubricate might be a formulation   
   >requirement.  In other words, it better not be conductive.   
   >   
   >Deoxit is mosly mineral oil (saturated parrafin oil) which will   
   >evaporate, but very slowly.  You'll need some kind organic solvent to   
   >clean off the oil residue from the PCB.  If you using Cramolin Red   
   >instead of Deoxit, there's some oleic acid in the mix as an oxide   
   >remover, which will very slowly corrode copper and must be removed   
   >from the PCB.   
      
   I guess I did not explain that real well. Of course it's not conductive,   
   but what I meant is whether there could be water in it, meaning till it   
   drys it could be conductive via the water. I know most chemicals these   
   days cant contain solvents which are air pollution. In fact a mechanic   
   friend told me that auto paints no longer contain laquer thinner, and   
   some are even water based.   
      
   Knowing it's mineral oil eliminates that worry. I've never seen that   
   Cramolin Red, but I'll be sure to never buy it. Deoxit seems to be the   
   best anyhow, so I dont buy anything else. Years ago, I used Radio Shacks   
   contact cleaner most of the time, which usually worked ok, but that is   
   no longer available and Deoxit is better anyhow. It's a little on the   
   pricey side, but I find myself using less of it than I used with the   
   sprays I used in the past.   
      
   Thanks for the help.   
      
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