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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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What's the point of Rector Seal C-flux?
This is soldering flux that has powdered solder in it. You apply it to
the joint, heat, & apply solder. Just like you do for regular flux. So why use C-flux? It's not pre-tinning, as that means wetting the joint surfaces before assembly. And if the C-flux isn't applied to the whole joint, the whole joint isn't going to be wetted, just like regular solder. The Rector Seal web site says "When heated, it reduces the surface tension in the joint and allows the solder to flow easily and uniformly into the joint." Which is what regular solder does. What am I missing? Thanks, Bob |
#2
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What's the point of Rector Seal C-flux?
Back in the days when I used to repair fender dents with lead I used a
product called Tinit which had powered solder in it. With the surface tinned all I had to do was heat the lead stick until it sofened and apply it. I did not have to melt the lead. Engineman On Aug 3, 5:49�pm, BQ340 wrote: Bob Engelhardt wrote: This is soldering flux that has powdered solder in it. �You apply it to the joint, heat, & apply solder. �Just like you do for regular flux. �So why use C-flux? It's not pre-tinning, as that means wetting the joint surfaces before assembly. And if the C-flux isn't applied to the whole joint, the whole joint isn't going to be wetted, just like regular solder. The Rector Seal web site says "When heated, it reduces the surface tension in the joint and allows the solder to flow easily and uniformly into the joint." �Which is what regular solder does. What am I missing? Thanks, Bob Used for Lead-free solder, which does not seem to wick as easily as the real stuff. MikeB- Hide quoted text - - Show quoted text - |
#3
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What's the point of Rector Seal C-flux?
On Aug 3, 5:36*pm, Bob Engelhardt wrote:
This is soldering flux that has powdered solder in it. *You apply it to the joint, heat, & apply solder. *Just like you do for regular flux. *So why use C-flux? It's not pre-tinning, as that means wetting the joint surfaces before assembly. And if the C-flux isn't applied to the whole joint, the whole joint isn't going to be wetted, just like regular solder. The Rector Seal web site says "When heated, it reduces the surface tension in the joint and allows the solder to flow easily and uniformly into the joint." *Which is what regular solder does. What am I missing? Thanks, Bob Hi, Bob. We use solder paste to solder surface mount components to circuit boards. Both leaded solder and lead free solder. The solder paste will melt(fuse) at slightly lower temperature than solid solder. There is no advantage for us, except when doing boards with components on both sides. The first side is done and soldered in a oven, then turned over and paste applied to the pads and that side's components are mounted. Then the board goes back through the convection oven to melt the solder paste for the new components. If the oven profile is just right, the paste will melt, but the solid solder on the bottom will not melt. However, if things are not quite right, capillary action will still hold the bottom components. If the component is too heavy and the solder melts, we loose the component and have to add it by hand. In your case, I don't know if there is any advantage to solder paste. Just a lot more expensive. Paul |
#4
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What's the point of Rector Seal C-flux?
"Bob Engelhardt" wrote in message ... This is soldering flux that has powdered solder in it. You apply it to the joint, heat, & apply solder. Just like you do for regular flux. So why use C-flux? It's not pre-tinning, as that means wetting the joint surfaces before assembly. And if the C-flux isn't applied to the whole joint, the whole joint isn't going to be wetted, just like regular solder. The Rector Seal web site says "When heated, it reduces the surface tension in the joint and allows the solder to flow easily and uniformly into the joint." Which is what regular solder does. What am I missing? Thanks, Bob The flux most likely helps fill in holes in the flow. |
#5
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What's the point of Rector Seal C-flux?
On Aug 3, 6:36*pm, Bob Engelhardt wrote:
This is soldering flux that has powdered solder in it. *You apply it to the joint, heat, & apply solder. *Just like you do for regular flux. *So why use C-flux? It's not pre-tinning, as that means wetting the joint surfaces before assembly. And if the C-flux isn't applied to the whole joint, the whole joint isn't going to be wetted, just like regular solder. The Rector Seal web site says "When heated, it reduces the surface tension in the joint and allows the solder to flow easily and uniformly into the joint." *Which is what regular solder does. What am I missing? Thanks, Bob I've used similar stuff for copper plumbing projects, with the various lead-free solders around, it prevents dud joints. They're making all sorts of different soldering alloys out there, many do NOT flow like the old lead-tin stuff or even the somewhat newer tin-silver stuff. Heat some of it too long and it just turns into metallic dough and doesn't stick anything together, or flow into the joint, either. The stuff I used could be applied, heated and no extra solder was needed on properly fitted joints. Worked well for tinning soldering irons, too. The key thing for pipe joints was to apply the stuff, fit the parts together and give the tubing about a 1/4 turn before heating. Stan |
#6
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What's the point of Rector Seal C-flux?
On Monday, August 3, 2009 at 5:36:49 PM UTC-7, Bob Engelhardt wrote:
This is soldering flux that has powdered solder in it. You apply it to the joint, heat, & apply solder. Just like you do for regular flux. So why use C-flux? It's not pre-tinning, as that means wetting the joint surfaces before assembly. And if the C-flux isn't applied to the whole joint, the whole joint isn't going to be wetted, just like regular solder. The Rector Seal web site says "When heated, it reduces the surface tension in the joint and allows the solder to flow easily and uniformly into the joint." Which is what regular solder does. What am I missing? Thanks, Bob C Flux does pretin the copper solder joint as it is applied (like regurlar flux) to the joint before soldering hence it acts inside the joint. I have used both regular solder and C Flux. Will only use C Flux now. Basically it gives a more assured solder joint than regular flux. |
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