Four
-----Original Message-----
From: Bissonnette, Jean-Francois [mailto:[log in to unmask]]
Sent: Thursday, February 27, 2003 11:10 AM
To: [log in to unmask]
Subject: Re: [TN] Adding liquid flux when hand soldering
Nope! Three!
-----Original Message-----
From: Phil Nutting [mailto:[log in to unmask]]
Sent: Thursday, February 27, 2003 10:46 AM
To: [log in to unmask]
Subject: Re: [TN] Adding liquid flux when hand soldering
Steve,
I was beginning to think I was totally off base with my method of soldering
and about ready to shut up and climb under a rock. What you have just
written is the exact process that I have found works best. At lease there
are two of us on the same side of the tracks. ;-)
Phil
-----Original Message-----
From: Shoda, Steve [mailto:[log in to unmask]]
Sent: Thursday, February 27, 2003 9:54 AM
To: [log in to unmask]
Subject: Re: [TN] Adding liquid flux when hand soldering
Our process teaches operators to add liquid flux before core solder. In my
opinion, it helps because the lower surface tension of the flux has better
wetting to the solder tip. This increases the cross sectional area of a path
the heat from iron can flow to the item being soldered. The resultant
solder joint is not different, but the smoothness, ease, and cycle time of
getting there is improved.
Steve
-----Original Message-----
From: Phil Nutting [mailto:[log in to unmask]]
Sent: Thursday, February 27, 2003 8:43 AM
To: [log in to unmask]
Subject: Re: [TN] Adding liquid flux when hand soldering
Brian,
I can't argue with your statements. I can only speak from personal
experience (including a test last night) that adding the liquid flux makes a
much better solder joint with less heat applied to the joint. In a quick
poll of some of my fellow old-timers who worked on military stuff all
agreed.
Gee, what would Moonman say to this one?
Phil
-----Original Message-----
From: Brian Ellis [mailto:[log in to unmask]]
Sent: Thursday, February 27, 2003 3:17 AM
To: TechNet E-Mail Forum.; Phil Nutting
Subject: Re: [TN] Adding liquid flux when hand soldering
If you are using cored solder, you should never add flux. Because:
a) liquid flux will spread beyond where you need it and add to contamination
b) the chances are the two fluxes will be incompatible with each other
c) there is a distinct possibility the residues will be impossible to
clean off correctly or, if they are both "no-clean", they will form a
dangerous flux porridge which could be ionically incompatible with
reliability
d) you are insulting the wire manufacturer who has determined the
quantity and type of flux, through scientific lab tests, to optimise
what you are trying to do.
IOW, you will cause far more harm than good.
Brian
Phil Nutting wrote:
> Is it a common practice to add liquid flux when soldering by hand or do
you rely on the flux core of the solder? My 30+ years says add the liquid
flux for the best solder joint, but that was back when I was involved with
rocket science.
>
> Phil Nutting
>
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