Best flux for reflow / reball - GSM-Forum

iphonerepair12 · 10-16-2017, 11:34

What kind of flux is the best (bubble free) for reflow (lead-free solder) and for reball iPhone BGA's ?

Kradziej · 10-16-2017, 15:09

all fluxes are good
more corrosive fluxes will have longer working time but will damage your solder tips faster
if you dont care about your tips then it doesnt matter just use one flux for everything
I was using almost all popular fluxes like AMTECH (6 different kinds), alpha (om-338/rma-7), kester (tsf6502), edsyn (fl22), chipquik and I can tell you that all fluxes in the same activity class feels the same
But all of them have some kinds of toxic additives that you dont really want to breathe unless you have good vents. Thats why I ended up using cheap (1$ for 40g), local production solder flux for everything, and I know is just not that toxic like these all expensive ones

orx · 10-16-2017, 15:37

I do not agree that all fluxes are good ..
if you refer to Amtech Chinese 2-dollar syringe clones, they are useless for any job.
AMTECH original, RM223, NC559, MG CHEMICAL, KESTER ..
They are recommended for SMD.
and anyway I agree everyone is toxic but I would not spend a few dollars to blame when I have to redo the bsod lines of an iphone.

Kradziej · 10-16-2017, 17:11

Quote:

Originally Posted by orx

I do not agree that all fluxes are good ..
if you refer to Amtech Chinese 2-dollar syringe clones, they are useless for any job.
AMTECH original, RM223, NC559, MG CHEMICAL, KESTER ..
They are recommended for SMD.
and anyway I agree everyone is toxic but I would not spend a few dollars to blame when I have to redo the bsod lines of an iphone.

Yep you are right these chinese Amtech clones are terrible but still I have the same effectiveness with 1$ and 30$ fluxes that are not chinese clones

using this right now
pasta-cyn/fluxes/cynel/pasta-cynel-1/[/url]

orx · 10-16-2017, 19:22

Very interesting...i will try it . At the end is always a research new products for best work.

re335 · 10-18-2017, 03:23

Amtech, fluxplus, etc...

excessive · 10-20-2017, 13:12

Mechanic.... of course original from HK.

Vent is always important....

10-16-2017, 11:34	#1 (permalink)
iphonerepair12 Freak Poster Join Date: Oct 2013 Posts: 105 Member: 2045117 Status: Offline Thanks Meter: 7	Best flux for reflow / reball What kind of flux is the best (bubble free) for reflow (lead-free solder) and for reball iPhone BGA's ?

10-16-2017, 15:09	#2 (permalink)
Kradziej Freak Poster Join Date: Sep 2015 Posts: 198 Member: 2453408 Status: Offline Thanks Meter: 63	all fluxes are good more corrosive fluxes will have longer working time but will damage your solder tips faster if you dont care about your tips then it doesnt matter just use one flux for everything I was using almost all popular fluxes like AMTECH (6 different kinds), alpha (om-338/rma-7), kester (tsf6502), edsyn (fl22), chipquik and I can tell you that all fluxes in the same activity class feels the same But all of them have some kinds of toxic additives that you dont really want to breathe unless you have good vents. Thats why I ended up using cheap (1$ for 40g), local production solder flux for everything, and I know is just not that toxic like these all expensive ones

10-16-2017, 15:37	#3 (permalink)
orx No Life Poster Join Date: Oct 2012 Location: Republic of Serenissima Posts: 1,516 Member: 1825965 Status: Offline Thanks Meter: 874	I do not agree that all fluxes are good .. if you refer to Amtech Chinese 2-dollar syringe clones, they are useless for any job. AMTECH original, RM223, NC559, MG CHEMICAL, KESTER .. They are recommended for SMD. and anyway I agree everyone is toxic but I would not spend a few dollars to blame when I have to redo the bsod lines of an iphone.

10-16-2017, 19:22	#5 (permalink)
orx No Life Poster Join Date: Oct 2012 Location: Republic of Serenissima Posts: 1,516 Member: 1825965 Status: Offline Thanks Meter: 874	Very interesting...i will try it . At the end is always a research new products for best work.

10-18-2017, 03:23	#6 (permalink)
re335 Junior Member Join Date: Jan 2017 Posts: 18 Member: 2670357 Status: Offline Thanks Meter: 0	Amtech, fluxplus, etc...

10-20-2017, 13:12	#7 (permalink)
excessive No Life Poster Join Date: Mar 2005 Location: Italy, Bahrain, India Age: 53 Posts: 1,235 Member: 125037 Status: Offline Sonork: 100.1649338 Thanks Meter: 254	Mechanic.... of course original from HK. Vent is always important....