What will dissolve solder?
Fluroboric acid (0.3M) with hydrogen peroxide (0.2M) selectively removes solder quite nicely.
One gram solder samples in the concentration range of 40-63 wt % tin are completely dissolved using nitric and hydrochloric acids.
It is known that nitric acid will dissolve tin or solder. It is also known that ferric nitrate will dissolve copper and tin-copper alloys.
How to Desolder Through-Hole Parts, Why Some Joints are Difficult
Touch the cold flat head screwdriver to the liquid solder, and quickly remove it. If done properly, the solder should adhere to the cold screwdriver and can be removed from the surface. This process can be repeated to remove any remaining amount of solder.
Drill. The other option to remove the solder from circuit board holes is by using a drill or pin vise. In this desoldering method, you have to use a small steel bit with a diameter of fewer than 0.029 inches to drill the circuit board hole. If the diameter of the bit is bigger, you will damage the board.
With the aid of the propane torch, heat the ends of the copper pipe so that the old solder will melt and can be removed. Using a dry rag, wipe away any solder that is left. Take extra precaution to ensure you don't burn yourself when wiping away the old solder from the pipe.
Abstract. Computer circuit board scrap was first treated with one part concentrated nitric acid and two parts water at 70 degrees C for 1 h. This step dissolved the base metals, thereby liberating the chips from the boards.
Mike's Quick Tips - #12 - Free Desoldering Wick - YouTube
hydrogen chloride (HCl), a compound of the elements hydrogen and chlorine, a gas at room temperature and pressure. A solution of the gas in water is called hydrochloric acid.
How do you remove solder from a gold coin?
Solder has a low melting point, which is the reason it is used. So the wires and the bulk of the solder can be removed by melting with a small soldering iron and sucking it up with desoldering braid or a solder sucker. You can get what you need from an electronics store for about $25.
Characteristics: Metallic tin is soft and malleable. It slowly dissolves in dilute nonoxidizing acids or more readily in hot concentrated HCl. It reacts with HNO3 to form metastannic acid, H2SnO3, a white substance insoluble in alkalies or acids.
Mike's Quick Tips - #12 - Free Desoldering Wick - YouTube
With the aid of the propane torch, heat the ends of the copper pipe so that the old solder will melt and can be removed. Using a dry rag, wipe away any solder that is left. Take extra precaution to ensure you don't burn yourself when wiping away the old solder from the pipe.
How Do I Clean Soldered Joints on Copper Tubing? - YouTube
