Another e cig study

[robby]

Mar 28, 2013 13:26:11 GMT matt1988 said:

Mar 28, 2013 13:21:42 GMT hgvroy said:

robby,I'm not familiar with carto's, in your picture is that big blob of solder in contact with the juice?

Yeh it is, although behind the wadding and matting. So maybe the matting will keep out the liquid, although I'm not confident it will.

edit: looking at the pictures again, looks like the solder is not covered by anything apart from the wadding that will have been wrapped around it. 
So yes the solder will have been in direct contact with the liquid.

I think you could class just about everything as being in contact with the juice though, it is vapourising and condensing on the inside of the carto everytime you vape it. 

hgvroy

[giles]

I don't much like the look of these - from our favourite supplier, and I have 5 of the things -http://www.vapeescape.co.uk/dual-coil-cartomisers-%28single%29~13

[robby]

Mar 28, 2013 13:46:33 GMT giles said:

I don't much like the look of these - from our favourite supplier, and I have 5 of the things -http://www.vapeescape.co.uk/dual-coil-cartomisers-%28single%29~13

There is a lot of solder in there by the look of it, now I am no expert on metal toxicity, but I wouldnt have thought that was a good thing. Please somebody correct me if I am wrong. giles

[matt1988]

giles does that solder heat up when in use? Surely not!

[robby]

It shouldnt do to the point where it would melt, but it will get hot of course and liquid will get on it, but I dont know what possible effects there would be from all that. I dont know what type of solder is used by the manufacturer of those. Personally I dont like the thoughts of ANY solder in there.

[hgvroy]

Mar 28, 2013 13:56:48 GMT matt1988 said:

giles does that solder heat up when in use? Surely not!

It can't get that hot otherwise it would melt

[robby]

Mar 28, 2013 14:14:58 GMT hgvroy said:

Mar 28, 2013 13:56:48 GMT matt1988 said:

giles does that solder heat up when in use? Surely not!

It can't get that hot otherwise it would melt

Goood pooint lololol

[matt1988]

How hot to the coils get? 120-130 degrees C? And common solder melts at 160 roughly. It may not melt I suppose. But heating up and water getting on to it, surely it will corrode? Maybe I'm just over thinking things again lol.

[hgvroy]

Mar 28, 2013 14:17:07 GMT robby said:

Mar 28, 2013 14:14:58 GMT hgvroy said:

It can't get that hot otherwise it would melt

Goood pooint lololol

sorry robby, cross post there

[giles]

Mar 28, 2013 14:09:31 GMT robby said:

I dont know what type of solder is used by the manufacturer of those. Personally I dont like the thoughts of ANY solder in there.

I don't know either, and I agree. China banned lead in solder according to the original article, but implied that whiskers (which I guess are likely to melt a little) would usually occur from the solder that they did use. They found Particles and whiskers contained mainly tin with minor amounts of copper and nickel.  

I don't know where Jason gets these from, but best guess is China.

[giles]

Mar 28, 2013 13:56:48 GMT matt1988 said:

giles does that solder heat up when in use? Surely not!

As others have said, not to the point of melting it all. But these researchers found these metals in the vapour, they thought from solder, so it is being transferred somehow. The amounts transferred are small compared to the amount of solder, but large (in the case of nickel anyway) compared to what you would want to inhale.

[robby]

Was lookin at sterling silver crimps on ebay, cheap as chips

[robby]

Mar 28, 2013 14:18:13 GMT matt1988 said:

How hot to the coils get? 120-130 degrees C? And common solder melts at 160 roughly. It may not melt I suppose. But heating up and water getting on to it, surely it will corrode? Maybe I'm just over thinking things again lol.

I`m speculating here, but are citrus fruit type e liquids not going to have a greater effect?

[hgvroy]

Mar 28, 2013 14:21:54 GMT giles said:

Mar 28, 2013 14:09:31 GMT robby said:

I dont know what type of solder is used by the manufacturer of those. Personally I dont like the thoughts of ANY solder in there.

I don't know either, and I agree. China banned lead in solder according to the original article, but implied that whiskers (which I guess are likely to melt a little) would usually occur from the solder that they did use. They found Particles and whiskers contained mainly tin with minor amounts of copper and nickel.  

I don't know where Jason gets these from, but best guess is China.

Here is the full text regarding the solder

Tin in the centrifuged pellets likely came from the solder joints or from solder that escaped into the cartomizers during manufacture or pre-sale testing. In general, solder joints were poorly formed, often appeared to be cold joints, and had rough surfaces and associated tin whiskers. No lead was found in the solder joints, which is consistent with China's ban on the use of lead in solder [22]. Lead-free solders are difficult to use and because of their high rigidity may be more fragile than solders containing lead [22]. When subjected to temperature cycling, lead containing-solders outperformed lead-free solders [22], which may be a factor in ECs undergoing cyclic temperature changes. Lead free-solders may also form tin whiskers, as was seen in EC solder joints and among cartomizer fibers. Tin whisker growth can be accelerated by electrical current at room temperature [23], and the use of the cartomizers before packaging may have facilitated tin whisker production.

[hgvroy]

Mar 28, 2013 14:31:46 GMT robby said:

Mar 28, 2013 14:18:13 GMT matt1988 said:

How hot to the coils get? 120-130 degrees C? And common solder melts at 160 roughly. It may not melt I suppose. But heating up and water getting on to it, surely it will corrode? Maybe I'm just over thinking things again lol.

I`m speculating here, but are citrus fruit type e liquids not going to have a greater effect?

I suppose it depends on whether any of the flavorings actually contain any citric acid