Douglas, 

I am searching my records for some AT&T/BELL labs testing to simulate “dirty air/condensation”. These experiments determined that condensation would begin on average at 60% Rh and a film would form with a Ph factor between 2 and 4! I think this is called corrosion!

If I find those methods (done in the 80’s) I will forward you the references!

David A. Douthit


> On Jun 15, 2018, at 7:14 AM, Douglas Pauls <[log in to unmask]> wrote:
> 
> Good morning all,
> 
> I am about to turn one of my co-ops loose on a project.  Years back, I
> recall a test method, I think from a Mil-STD, that involved exposing a
> circuit to "branch water".  This was water with some form of electrolyte in
> it to represent condensed water from a dirty atmosphere.  Is anyone
> familiar with the test method I am thinking of?  Or something similar?
> 
> 
> Doug Pauls
> Principal Materials and Process Engineer
> Rockwell Collins
>