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Soldering is a method of joining metal parts using an alloy of low melting point (solder) below 450 °C (800 °F). Heat is applied to the metal parts, and the alloy metal is pressed against the joint, melts, and is drawn into the joint by capillary action and around the materials to be joined by 'wetting action'. After the metal cools, the resulting joints are not as strong as the base metal, but have adequate strength, electrical conductivity, and water-tightness for many uses. Soldering is an ancient technique that has been used practically as long as humans have been making articles out of metal.
Soldering can be done in a number of ways, including passing parts over a bulk container of melted solder, using an infrared lamp, or by using a point source such as an electric soldering iron, a brazing torch, or a hot-air soldering tool. Flux is usually used to assist in the joining process. Flux can be manufactured as part of the solder in single or multi-core solder, in which case it is contained inside a hollow tube or multiple tubes that are contained inside the strand of solder. Flux can also be applied separately from the solder, often in the form of a paste. In some fluxless soldering, a forming gas that is a reducing atmosphere rich in hydrogen can also serve much the same purpose as traditional flux, and provide the benefits of traditional flux in re-flow ovens through which electronic parts placed on a circuit card are transported for a specific period of time.
One application of soldering is making connections between electronic parts and printed circuit boards. Another is in plumbing. Joints in sheet-metal objects such as cans for food, roof flashing, and drain gutters were also traditionally soldered. Jewelry and small mechanical parts are often assembled by soldering. Soldering can also be used as a repair technique to patch a leak in a container or cooking vessel.
More on [ Soldering ]
Metal Joining :: Alloys
Welding :: Technology
Winners of gingerbread contest at @CarolineCo used soldering iron, welding mask for their "Nuclear Winter" house and landscape. Awe. Some.
HoustonPress (Houston Press) Sat, 19 Dec 2009 20:48:52 -0000
Winners of gingerbread contest at @CarolineCo used soldering iron, welding mask for their "Nuclear Winter" house and landscape. Awe. Some.
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