Adding more solder only made it worse. Right now I'm trying to clean the existing solder off the board but can't get it to melt even when setting my iron to a high temperature. Applying solder wick doesn't absorb it. Maybe all the flux burned off and that's causing it not to melt? What would be the best way to clean up a PCB that's been badly soldered like this? Thanks for any advice. Jesus tap-dancing Christ, that poor, poor PCB!
My suspicions: 1 "High temperature" ain't as high as you think. Try cleaning the tip with a gentle brass brush or a wet sponge and lots of flux and fresh solder, then clean the board with isopropyl alcohol, then flood the board and the solder wick with liquid flux. Try again. Looks like you may have ripped up a couple pads. No longer active here - try the IRC channel if you just can't be without me. Quote from: cp on August 17, , am. OK, C should be plenty. Though, a warning - not all soldering stations that can be set to C can actually maintain that temperature when applied to a large thermal mass.
I have had cheapo soldering tips that disintegrated in lead-free, you might want to try something different. That ugly blob looks exactly like my first foray into the sadistic hell that is lead-free solder, so I think that's what you've got. Either way, the stuff already on the board is definitely lead free. I use Kester 44 eutectic - don't gasp too much at the price, remember, that's a full pound of it.
It's a bit thicker than what Dave and company recommend, but I like it. Either type of flux will work, and I find both equally convenient, so just get whatever you think you'll prefer.
I think you'll find that a lot of things magically start working better with a liberal application of flux. Sigmoid Frequent Contributor Posts: Country:. Quote from: superscott on August 17, , am. Kester 44 is excellent solder, I've used it for many many years.
There are several things that can be wrong but start with the solder and I don't mean the solder on the pcb.
Can you melt solder you have on hand with your iron? The way you repair a cold joint is by reheating it with your soldering iron until the solder begins to flow. Cold joints frequently have excess solder which you can draw off with the soldering iron tip. You can prevent cold solder joints by giving your soldering iron sufficient power and time to warm up. What is the melting point of 60 40 solder?
It is also very soft, meaning that cracks do not form so readily if the joint moves during cooling. Does tinning flux go bad? Presumably one reason for a stated expiration date is that the flux becomes less active over time as it interacts with the solder metal.
But in our personal experience, this kind of solder seems to generally work just fine, even many years past its nominal shelf life.
Can solder joints go bad? The only way a joint can fail is if it is not made properly, whether it is because the solder did not flow properly or the pipe was not inserted all the way into a fitting.
It has nothing to do with turbulence because the solder does not interact with the liquid flow. How can you tell if solder is bad? If it has gone bad it will stand around on street corners, smoking cigarettes and making weird sucking sounds at female passersby. Another sign of a bad solder joint is if the solder is dull after it hardens, this is what happens with a "cold" joint. I wouldn't think so. Butane burns at over degrees. It would render the plastic useless. Your best bet would be to buy or make a filament maker.
It recycles these plastics and reforms it into feed-able filament for 3D printing:. I dont see why not!
Nylon or polyester should completely incinerate in the "hell fire" of a small crucible and propane torch. Any irregular material should be left behind as slag. It's worth a shot!! Just watch out for fumes. Remelt and reconstitute hot glue? Allot of that goes to waste with the glue gun just sitting idle. Let me know if it works! Oh man! We had very similar ideas. Right down to the title. And by that I mean, yours is actual real usful metal. Well done.
This may be true with rosin-core solder, to which you are referring. The flux you need for it is applied separately to the project before soldering, like in stained glass or copper pipe welding. You make a good point that I was wrong to state that you could effectively reclaim solder for electronics rosin-core.
But, I have also made solder joints just using the "tinning flux" in an emergency, like miles and miles from any supply point and needing to make one joint without a roll of solder available. You must have extrapolated that from my reply. I was just commenting on whether it could be done and whether there would be voids. It it was a "bad" joint, then there would be voids whether you added solder or not.
Edited 1 times. Sorry, I did extrapolate because I was trying to clarify the point. Thanks for responding So just 'warming and spinning' a good soldered joint could be done, BUT it's safer and more common to resolder. By the way, I found an old thread which discusses the same thing. In fact, you are in it Oh, pitch can be found, but then you need to find guys to apply it. We were doing a house in Chicago during the summertime, and it had a pitch, NOT pitched , roof.
The roofers were walking around like a picket line with signs reading "No pitch roofs" because it is even worse to work with than tar in hot weather. Can anyone tell me why that is? I am not familiar with anywhere that prohibits a solder joint underground, as long as it is not inside a building under concrete. I sometimes wonder if those who quote that prohibition are misquoting a regulation.
That is a requirement for joints underground INSIDE a structure, so I am wondering if someone, in their exuberance, has expanded it to mean outside also. Outside there is absolutely no reason for the prohibition, I have been making underground solder joints for over 60 years in Illinois, Michigan, and Arizona , because even if the joint fails it does not cause any structural problem. Search for plumbing parts on our sponsor's site:. Special thanks to our sponsor:.
Over , strictly plumbing related posts. How to Show Images. Reheat, Rotate, and Resolder joint OK? Post Reply. Author: bernabeu SC if against code don't do it however, re: soldering heat the joint until internal solder melts, roll fitting apply COPIOUS amount of flux even if you 'burn' the brush apply more solder you will be fine - - - - Retired U. Author: packy MA geesh bernabeu, this is getting silly. Author: hj AZ I have never heard of that prohibition, except under concrete floors inside a building.
Author: hj AZ One more time and I am going to start building an ark, because the end of time will be near. Author: bernabeu SC actually, to be serious, Packy and I probably agree on almost all piping matters so how many cubits long do we need?
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