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Disadvantages Of Soldering

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SOLDERING
Soldering is used to join two or more metal items together by melting and flowing a filler metal called solder into the joint. It is different from welding because soldering does not requires melting the work pieces. In brazing, the solder melts at high temperature while work metal remains intact. Earlier, solders contained lead but now we use lead free alloys for soldering.
SOLDERS-
Solders are available in forms of alloys. In electronics, a eutectic alloy of 63% tin and 37% lead is used. Examples are: tin-lead, tin-zinc (for joining aluminium), lead -silver, zinc-aluminium etc.
A eutectic alloy is advantageous because- the liquid and solid temperature are same,hence no plastic phase occurs and so minimum melting point is formed …show more content…

Water-soluble fluxes which are removed by water after soldering is completed(no VOC required)
2. No-clean fluxes are those which do not require cleaning after soldering but finger print on soldered joints is a class three defect.
3. Traditional rosin fluxes - are available in non-activated,mildly activated and activated formulations in which RMA and RA when combined with acids,increase the wettability of metals.
Pipe soldering
Pipe soldering is used for joining copper pipes or "tubes".
Propane torch is used for soldering the copper tubes since it conducts away heat at very fast rate. acetylene fueled torch is not used because flame temperature is much higher than the melting point of copper. Too much of heating may destroy temper of copper and cause faulty joints..
For pipes ranging from 8mm to 22mm,an instrument called Antex Pipemaster is recommended. It’s the pliers like tool which uses heated fitted jaws which completely encircle the pipe and melt it very fast.
Copper soldering requires some prerequisites:
• The tubing and fittings must be tarnish free.
• Pressure outlets must be present.
• Water free joints. …show more content…

A Soldering Copper is a tool which has a copper head of huge size and a handle which is long and heated in forge fire of blacksmith and is used to apply heat to, for soldering. Typical soldering copper have heads weighing between 1 to 4 pounds. A large thermal mass to store a lot of heat for soldering larger areas is provided by this heat, before needing re-heating in the fire. Larger the head, longer is the working time. Body Solder is now mostly superseded by spot welding in mechanical connections and non-metallic fillers for contouring.
For preparing Plumbing Joints for connection, generally wire brush, emery clothes and wire wool are used. Electronic joints are made between surfaces that are tinned and quite rarely require mechanical cleaning, though tarnished component leads and copper traces, with a layer of oxide passivity, or because of aging, may need mechanical

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