impressive.  must be aspartame enhanced brain activity... as for 2 -  
exposed Cu normally in consumer product with out conformal coat...  
(edge of smt pads, for example), 3.36 pH is something to worry about  
(not sure what kind of buffer it has, pH4 enough to attach some of  
low grade stainless steel).  as for 4, since you didn't tell me the  
coke vs dew aspartame content... hard to judge... I'll leave for the  
technet to sort out which one based on the "behavior"...http:// 
nutritionfacts.org/2016/09/01/side-effects-of-aspartame-on-the-brain/
Congratulations.  you truly deserve a award (hopefully, it is not  
ionograph machine or some sort).
jk
On Feb 18, 2017, at 10:47 AM, Douglas Pauls wrote:

> 1.  The pH depends on how long it has been opened and how much CO2 has
> escaped.  The nominal pH is 3.36.
> 2.  what kind of copper and what level of protection?
> 3.  Silicones should be chemical resistant enough to not be  
> stained, at
> least by diet dew.
> 4.  Well, I drink Diet Dew.  Hillman drinks Diet Coke.  Which do  
> you figure
> is more deranged?
>
>
> Doug Pauls
> Principal Materials and Process Engineer
> Rockwell Collins
>
> On Fri, Feb 17, 2017 at 10:34 AM, Joyce Koo <[log in to unmask]> wrote:
>
>> bucket of Mountain Dew.  Here is the friday quiz for doug:
>> (1) what is the pH of mountain dew?  copper corrosion rate in  
>> mountain dew?
>> (2) what is the pH of de-aireaded mountain dew?  copper corrosion  
>> rate?
>> (3) how to clean the mountain dew stained silicone coating?  hehehe
>> (4) which one is more harmful to your brain, mountain dew or Coke?
>> jk
>> Let's see how fast the answer is come back... start count (1.33pm in
>> eastern time now).
>>> What'd he win, what'd he win?
>>>
>>> And can he trust a Leprechaun and a Greek dwarf (I'm still not  
>>> sure the
>>> latter exist) with delivery?
>>>
>>> Other than that, I believe us (the Technet community) also owe  
>>> him big
>>> time for all the hard acquired knowledge he doesn't hesitate to  
>>> share
>> with
>>> us and with the big laughs I get reading most of his off-tech
>>> elucubrations!
>>>
>>> Thank you Doug!
>>>
>>> Ioan
>>>
>>> -----Message d'origine-----
>>> De : TechNet [mailto:[log in to unmask]] De la part de David Hillman
>>> Envoyé : Thursday, February 16, 2017 5:19 PM
>>> À : [log in to unmask]
>>> Objet : [TN] NTC - Reason for No Element Quiz This Week
>>>
>>> Hi team! The reason that Clumpy and Kloumpios were not available for
>>> Element Quiz duty this week is that the Doug Pauls, the king of  
>>> the half
>>> fractional elements, was the recipient of the IPC Hall of Fame  
>>> award. A
>>> very prestigious honor for Doug's 30+ years of dedicated service  
>>> to the
>>> electronics industry through his participation in industry
>> specifications,
>>> committees and committee leadership activities. There will be a good
>> write
>>> up on the award on the IPC web page posted sometime in the next  
>>> couple of
>>> weeks.  The boys are in charge of getting his award home in one  
>>> piece and
>>> will be ready for Quiz duty next week. FEQAB salutes Doug on a well
>>> deserved honor!
>>>
>>> Dave Hillman
>>> Rockwell Collins
>>>
>>>
>>