Vic8 Posted January 10, 2012 Share Posted January 10, 2012 I have 6 reels of cored solder that have been stored in damp conditions resulting in the sticker stating if the core is resin or acid being detached/lost. Is there any way a mere mortal such as me can identify if the flux is acid or resin. Thanks. Quote Link to comment Share on other sites More sharing options...
Hogster Posted January 10, 2012 Share Posted January 10, 2012 Its been a while since I played around with solder and fluxes. But solder core with acid fluxes used to be quite rare. The chances are its likely to be resin. I would use some and if the residue is brownish its resin, acid based fluxes, if I remember correctly, left a whitish residue. We used to use acid based fluxes and washed all residue for fear of corrosion. But I did tests and found no noticable corrosion after several years. Cored Fluxes are temperature dependent and provided your joints aren`t over 70 (conservative estimate) degrees for appreciable length of time I wouldn`t worry. Quote Link to comment Share on other sites More sharing options...
J.N. Posted January 11, 2012 Share Posted January 11, 2012 Posted by Hogster on 10/01/2012 20:03:03:Its been a while since I played around with solder and fluxes. But solder core with acid fluxes used to be quite rare. The chances are its likely to be resin. I would use some and if the residue is brownish its resin, acid based fluxes, if I remember correctly, left a whitish residue. We used to use acid based fluxes and washed all residue for fear of corrosion. But I did tests and found no noticable corrosion after several years. Cored Fluxes are temperature dependent and provided your joints aren`t over 70 (conservative estimate) degrees for appreciable length of time I wouldn`t worry. Many thanks for your comments.Edited By J.N. on 11/01/2012 09:13:59 Quote Link to comment Share on other sites More sharing options...
Erfolg Posted January 11, 2012 Share Posted January 11, 2012 I did not even know there was such a thing as acid cored solder. Quote Link to comment Share on other sites More sharing options...
Olly P Posted January 11, 2012 Share Posted January 11, 2012 It's niot acid cored as such, but the residue from the smoked flux is acidic.... It causes fun at work..... Quote Link to comment Share on other sites More sharing options...
Hogster Posted January 11, 2012 Share Posted January 11, 2012 I think acid fluxes are used more in the plumbing trade than electronics. And usualy, because of the size of the joints, the flux is applied seperately to the solder. I worked in electronics and we used solder core with water based flux which was supposed to be very corrosive and had to washed of, but in my experience that was a bit overstated. If your building for the MOD you cant leave anything to chance. But for consumer electronics the residue can be left with little risk IMHO. Quote Link to comment Share on other sites More sharing options...
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