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Rosin vs. Resin Flux

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GSx

#50439

Rosin vs. Resin Flux | 30 May, 2007

Are there significant diffrences in terms of soldering (wire for manual solder) performance by using RO vs RE fluxes?

Wich are the main differences between the two fluxes?

Thank you

Regards.....GSx

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#50454

Rosin vs. Resin Flux | 31 May, 2007

At the end of the day, you won't notice a difference, while soldering, but if you clean the flux residues.

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GSx

#50456

Rosin vs. Resin Flux | 31 May, 2007

Tnks Davef,

be patient pls, what does it exactely mean? That one of the two, in case of cleaning needs the flux residues are more difficult to remove for one of the two fluxes ?

i.e. NC wire fluxed by ROL0 compared to fluxed REL0, in terms of soldering point of view I should have same results, but in the worst case of cleaning needs I should pay attention by selcting the correct one, correct ?

other ?

Regards..... GSx

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#50457

Rosin vs. Resin Flux | 31 May, 2007

In addition to Dave�s response:

RO fluxes are based on natural pine (tree) rosin. RE fluxes are based on synthetic or modified rosins called resin.

Below a couple of advantages resin can have compared to rosin:

� Better thermal stability. � Resins can be modified to make them easier to clean. � Resins can be modified so they flash off by the heat of the solder tip and leave virtually no residues.

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#50459

Rosin vs. Resin Flux | 31 May, 2007

A solder wire classified as L0 under IPC J-STD-004 means that the flux residues can be left on the board safely, and when you select this type of cored wire the intention is not to clean. You just select a solder wire that gives you an acceptable level of flux residues depending on your company�s or customers criteria ( for cosmetic reasons only). RE or RO has nothing to do with performance or reliability of the flux it�s just an indicator for the flux main vehicle make-up. Just make sure you select an L0 solder wire with enough activity to do the job. Things usually go wrong in a no-clean environment when you use additional liquid flux (in squirt bottles) designed for wave soldering.

Patrick Interflux USA, Inc. Patrick@interfluxusa.com

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GSx

#50461

Rosin vs. Resin Flux | 31 May, 2007

Tnks Patrick,

additional infos.....

we are just playng with different NC solder wires L-F, the best results in terms of solderability (faster solder flowing, holes filling up) it seams are coming from an ROM1, as we know, according to J-STD-004, or IEC 61190-1 etc, it contains Halogen from 0,5% to 2,0%, and any way is considered NC, but a quick ROSE performed tells that those residuals contain about 0,5 ugr NaCl/cm2 equivalent.

We would prefer to use L0 in order to avoid any risck of Ionic contamination (reliability) left by flux residuals, but because we have both wires available ROL0 and REL0, that is why I am investigating about differences.

Thanks again.

Regards...GSx

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#50462

Rosin vs. Resin Flux | 31 May, 2007

Let me give you some good advice

You take already plenty of risk going lead-free, DO NOT use halogen containing fluxes in a lead-free no-clean process. Halogens left on the board will convert tin, silver and exposed copper into metal salts over time. As you stated a small percentage up to 0.5% was allowed and still be considered no-clean with conventional leaded solder because the lead in the alloy greatly neutralizes the reactivity of halogens and acids. It�s time the standards are modified for a lead-free environment, certenatly in no-clean.

For lead-free without cleaning use a L0 flux halogen or halide free to be on the safe side.

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#50465

Rosin vs. Resin Flux | 31 May, 2007

LOL... you need a break dave! MACGBWL!

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GSx

#50467

Rosin vs. Resin Flux | 31 May, 2007

Thank Patrick for your infos.

Seen that youa are an expett, when you'll have time, pls, tell me some thing about ORL0 (always in wire for L-F manual solder) compared to ROL0 and REL0 earlier already explained me.

Rgrds....GSx

PS:my target is to learn some new thing every day

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#50475

Rosin vs. Resin Flux | 1 June, 2007

OR: Stands for organic (organic acid based flux) with the absence of rosin and/or resin.

If you want to know everything about the classification of fluxes get the J-STD-004 �Requirements for Soldering Fluxes� at following link:

http://webvision.ipc.org/scripts/mgrqispi.dll?APPNAME=IPCWEB&PRGNAME=TOCFRAME&ARGUMENTS=-N,-N,-A,-A,-N50

PS: If you didn�t learn something new today you just wasted another day!

Have a great weekend, Patrick

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GSx

#50476

Rosin vs. Resin Flux | 1 June, 2007

Thanks Patrick,

also IPC-HDBK-001 explains even better then IPC-J-STD-004, but unfortunately not yet infos about flux for L-F soldering.That's why I am trying to get some infos more from experienced people.

Some L-F (SAC or SACX) cored wires vendors (flee market like ?) are suggesting to use wire with ROM1 flux(NC) in order to get a good and faster manual solder flow around PTH solder joints !!!!

Best Regards...GSx

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