16 Apr
2002
16 Apr
'02
4:32 a.m.
On Mon, 15 Apr 2002, Dave McGuire wrote:
Using a small area of the board where you could correct any damage
that this substance might cause, try a little CLR... it's a mixture
sold throughout the midwest (U.S.) that dissolves Calcium, Lime, and
Rust deposits. Phosphoric acid is one of its components... so be real
careful. I've never used it on PC boards before, but it can't be beaten
for removing corrosion off metal parts.
Regards,
-dq
-Douglas Hurst Quebbeman (DougQ at ixnayamspayIgLou.com) [Call me "Doug"]
Surgically excise the pig-latin from my e-mail address in order to reply
"The large print giveth, and the small print taketh away." -Tom Waits
TLC it performs flawlessly). The water
doesn't seem to do any harm at
all, even with long-term exposure...it's the crap that the water can
carry into the equipment, and sometimes corrosion later on.
So what can you do with accumulated mineal salts around component
legs? Looks like tin "rust". I tried firm-but-gentle with a stiff
toothbrush, and didn't get anywhere.
I have that MV3100-90 board that I think just needs the corrosion,
which I suspect is conductive, removed. 
16 Apr
16 Apr
5:19 a.m.
I've thought about picking some CLR up, but don't really have a current
use for it. You mention that it will remove corrosion, does that
include rust?
Chad Fernandez
Michigan, USA
Douglas H. Quebbeman wrote:
Using a small area of the board where you could
correct any damage
that this substance might cause, try a little CLR... it's a mixture
sold throughout the midwest (U.S.) that dissolves Calcium, Lime, and
Rust deposits. Phosphoric acid is one of its components... so be real
careful. I've never used it on PC boards before, but it can't be beaten
for removing corrosion off metal parts.
Regards,
-dq
5:07 p.m.
On Tue, 16 Apr 2002, Chad Fernandez wrote:
I've thought about picking some CLR up, but
don't really have a current
use for it. You mention that it will remove corrosion, does that
include rust?
Yes that includes rust, but I don't know if using it with PCBs is a good
idea yet, since I've never tried it. I would caution you to try it on a
junk board first. CLR is meant not only to loosen rust, but to completely
dissolve it.
Peace... Sridhar
Douglas H. Quebbeman wrote:
Using a small area of the board where you could
correct any damage
that this substance might cause, try a little CLR... it's a mixture
sold throughout the midwest (U.S.) that dissolves Calcium, Lime, and
Rust deposits. Phosphoric acid is one of its components... so be real
careful. I've never used it on PC boards before, but it can't be beaten
for removing corrosion off metal parts.
Regards,
-dq
8129
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dquebbeman＠acm.org -
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