[TriEmbed] desoldering alternatives to chipquik

[Martin Brooke]

My data dump on Chipquick and alternatives:

Chipquick SMD1NL  from: https://ultrakeet.com.au/write-ups/chipQuik

"ChipQuik is essentially an alloy containing Bismuth as its main
constituent, which in-itself has an inherently low melting point. Once the
alloy is heated and combined with standard Tin/Lead or Lead-Free solder,
the overall melting point drops dramatically to just under 60oC (as opposed
to the typical 180~200oC for tin-lead)"

This seems plausible but I feel that Chipquick is  already low melting
point when I use it.

from the MSDS <https://www.chipquik.com/msds/SMD1NL.pdf> Chipquik has:

Tin: Dust or fumes may cause irritation of the skin mucous membranes and
may result in a benign Pneumoconiosis (Stannosis).
Silver: May cause discoloration of eyes and skin (Argyia).
Bismuth: May cause foul breath, a blue-black line on the gums, and
Stomatitis.
Antimony: May cause gastrointestinal upset, sleeplessness, irritability,
and muscular pain.
Indium: May cause weight loss, pulmonary edema, blood damage and
degenerative changes in liver and kidneys.
Copper: apparently this is not too bad!

No Cadmium!   Toxic to kidneys, lungs, liver. Repeated or prolonged
exposure to the substance can produce
target organs damage. Repeated exposure to an highly toxic material may
produce general deterioration of health by an
accumulation in one or many human organs, also probably carcinogenic)


>From Wikipedia:
AlloyMelting pointEutectic <https://en.wikipedia.org/wiki/Eutectic>?Bismuth
<https://en.wikipedia.org/wiki/Bismuth>Lead
<https://en.wikipedia.org/wiki/Lead>Tin <https://en.wikipedia.org/wiki/Tin>
Indium <https://en.wikipedia.org/wiki/Indium>Cadmium
<https://en.wikipedia.org/wiki/Cadmium>Thallium
<https://en.wikipedia.org/wiki/Thallium>Gallium
<https://en.wikipedia.org/wiki/Gallium>Antimony
<https://en.wikipedia.org/wiki/Antimony>
Rose's metal <https://en.wikipedia.org/wiki/Rose%27s_metal> 98 °C (208 °F)
no 50% 25% 25% – – – – –
Cerrosafe 74 °C (165 °F) no 42.5% 37.7% 11.3% – 8.5% – – –
Wood's metal 70 °C (158 °F) yes 50% 26.7% 13.3% – 10% – – –
Field's metal <https://en.wikipedia.org/wiki/Field%27s_metal> 62 °C (144 °F)
yes 32.5% – 16.5% 51% – – – –
Cerrolow 136 58 °C (136 °F) yes 49% 18% 12% 21% – – – –
Cerrolow 117 47.2 °C (117 °F) yes 44.7% 22.6% 8.3% 19.1% 5.3% – – –
Bi-Pb-Sn-Cd-In-Tl 41.5 °C (107 °F) yes 40.3% 22.2% 10.7% 17.7% 8.1% 1.1% – –
Galinstan <https://en.wikipedia.org/wiki/Galinstan> −19 °C (−2 °F) yes <1.5%
– 9.5-10.5% 21-22% – – 68-69% <1.5%
If I had to guess you would want a bunch of Bismuth and some Cadmium so
that when you added Tin and lead (Silver and Tin) from the solder it  went
to a lower melting point

Woods metal
<http://www.ebay.com/itm/Similar-Cerro-Bolten-Type-Low-Melt-Casting-Alloy-158F-Bismuth-Tin-Lead-Cadmium-/191708954705?hash=item2ca2be8051:g:lT0AAOSw4HVWEsvq>looks
promising

and it is cheap.

But then a ton of Cerrolow 117 might work too.

For me i will probably stay with ChipQuick till I hear what  works!

Cheers,

M
​artin​
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