Thank you. You have restored my faith in the future of mankind.
Dewey
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Hfjord
Sent: Friday, August 25, 2006 6:13 AM
To: [log in to unmask]
Subject: [TN] NTC: water as a solvent
Wriday !!
Wacky water witty wail: warm water will wash wax!!
What way-out weird weak-mindeds will wet wavesoldered works with water?
Won't warm water warrantly wash'nwipe wirings? We wonder. Will water
washing win? Why
waiting? Wrestling with worsened workbooks whey-faced wannabes write
waterwashing winged words while we workers willfully whop whosover
whistle
water wash Whig. We won't want water, we want whiskey while water
wearability
will walkoff.
Wantonly
Ingemar Hernefjord
Ericsson Microwave Systems
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ahne Oosterhof
Sent: den 24 augusti 2006 22:54
To: [log in to unmask]
Subject: Re: [TN] FW: [TN] water as a solvent
And I thought you meant "they are all wet".
Ahne.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Whittaker, Dewey
(EHCOE)
Sent: Thursday, 24 August, 2006 12:35
To: [log in to unmask]
Subject: [TN] FW: [TN] water as a solvent
After sending this, Mr."it depends" sent me a message questioning my
lucidity. I said I never worked in that company, but to keep my comedy
enterprise solvent, I will explain.
The people must be bi-polar and if the water was it would be a great
cleaning medium( as opposed to the clairvoyant midget that escaped from
prison; small medium at large ), because I should of seen this coming,
just like when I had created the perfect solvent, but couldn't find
anything to keep it in.
Dewey
-----Original Message-----
From: Whittaker, Dewey (EHCOE)
Sent: Thursday, August 24, 2006 11:31 AM
To: 'TechNet E-Mail Forum'; 'Barmuta, Mike'
Subject: RE: [TN] water as a solvent
People who think that are what water should be to be effective.
Dewey
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Barmuta, Mike
Sent: Thursday, August 24, 2006 10:42 AM
To: [log in to unmask]
Subject: Re: [TN] water as a solvent
Hi Ed: I agree with you. Who in the heck said water is the best solvent
for cleaning PCB's?
It's recognized as a "universal" solvent because it has the ability to
solvate so many elements, compounds and mixtures. It is a great
decontamination agent on polar/hydrophilic materials.
However it is a terrible solvent when trying to remove
non-polar/hydrophobic residues. Obviously it requires a saponifier if
you want to remove these types of soils. Perhaps this is what they
meant.
Regards
Michael Barmuta
Staff Engineer
Fluke Corp.
Everett WA
425-446-6076
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Edward Mines
Sent: Thursday, August 24, 2006 9:31 AM
To: [log in to unmask]
Subject: [TN] water as a solvent
I have to disagree with the assertion that water is the best solvent for
cleaning PC boards.
It may be good for many (or even most no clean fluxes) but water alone
will not touch various greases and oils including finger prints. Have
you ever tried to clean you hands
with water alone after changing the oil in your car?
I don't know the legal consequences of using traditional vapor
cleaning equipment or the current availability of effective vapor
cleaning solvents, but I do know that vapor cleaning with trichlor was
very effective when it was the industry standard. Other solvents will
work too.
It is important to remove all oily residues (finger prints, mold
release agents etc) from PC boards prior to conformal coating -
otherwise incomplete coverage can take place.
Both MIL-I-46058 & IPC-CC-830 state that conformal coatings should be
free from voids, skips and other breaks in the coating.
Ed Mines
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