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activator
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A substance that initiates or accelerates a chemical reaction without being affected itself.
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activity
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The measure of flux cleaning strength. The more active the flux, the more effectively it cleans.
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adhesive bonding
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The joining of two or more materials through the use of a nonmetallic material such as liquids, drops, or gels.
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alloy
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A uniform mixture of two or more materials. One of the materials must be a metal.
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ammonia
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A toxic and corrosive compound with a characteristic pungent odor.
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antimony
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A blue-white metal used in a wide variety of alloys, electronics, and rubber.
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arcing
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Overheating that occurs when electricity flows from one surface to another. Electric arcs are dangerous because they can cause electric shock as well as burns and UV radiation.
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bismuth
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A white, brittle metal with a pinkish tinge that is added to steel to improve machinability.
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brazing
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A process in which a filler metal is melted at a temperature above 840° F (450° C), but below the melting point of the base metals to form a joint between two base metals. Brazing differs from welding because only the filler metal is melted.
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capillary action
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The ability of a substance to draw a liquid upwards against the force of gravity. For example, solder clings to a lead wire protruding upward from a PCB hole through capillary action.
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clamps
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Devices used to join, grip, support, or compress mechanical or structural parts.
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cold joint
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A dull, poorly soldered joint that does not provide good conductivity.
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conduction
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The transmission of heat across matter.
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conductivity
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The measure of a material's ability to conduct heat or electric current.
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convection
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The transfer of potential energy, for example heat, by currents within a fluid.
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desoldering
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The removal of solder and components from a circuit for troubleshooting and repair purposes.
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electrical assembly
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An electrical assembly is made from a frame, an electrical connector, and a self-contained part known as a module.
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electrically conductive
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Electrical conductivity refers to an object's ability to transmit an electrical charge.
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electronics fabrication
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The design, test, manufacture, and distribution of electronic components and assemblies.
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eutectic point
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The lowest temperature at which a substance will melt.
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flux
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A substance that facilitates soldering, brazing, and welding by chemically cleaning the metals to be joined.
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flux pen
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A flux application tool, usually shaped like a marker pen, that channels controlled amounts of water-soluble flux onto metal surfaces.
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fume extractor
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A fan or vent that diverts toxic fumes away from the soldering work area.
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hand soldering
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Soldering that is performed manually with a soldering iron.
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heat transfer
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The passage of thermal energy, i.e. energy in the form of heat, from a hot to a cold body.
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hydrochloric acid
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An acidic, highly corrosive chemical compound used in industry.
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inorganic
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Composed of matter other than plant or animal.
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joint
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The point at which two pieces of metal make contact and are bonded together with solder.
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lead
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A soft, heavy, toxic and malleable metal often used in solder.
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organic
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Derived from a living organism.
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oxidation
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A material's chemical reaction with oxygen. Oxidation causes rust and tarnish to form on metal surfaces, and prevents solder from bonding.
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PCBs
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In electronics, printed circuit boards, or PCBs, are used to mechanically support and electrically connect electronic components using conductive pathways, or traces, etched from copper sheets laminated onto a non-conductive surface.
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photons
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Particles of light energy produced by the sun.
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radiation
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A process of emission of energy in the form of waves or particles.
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reflow soldering
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An automated soldering process in which PCBs are run through an oven on a conveyor belt. Heat from the oven causes granules of solder to melt and form a joint.
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residue
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A substance deposited or left behind by a reaction or event.
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robot
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A mechanical device that automatically performs complicated and repetitive taks. Robots often perform work that is too dangerous or strenuous for humans.
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rosin-based
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A rosin-based flux is composed of rosin, a substance derived from the sap of pine trees.
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short circuits
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An interruption in the intended flow of electricity, especially when current flows "short" of reaching a device. A short circuit causes excess current flow.
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silver
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A silvery white metal that has the highest electrical conductivity of all metals. Silver is also fairly expensive.
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solder
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A fusible metal alloy, with a melting point or melting range below 840°F (450° C), which is melted to join metallic surfaces, especially in the fields of electronics and plumbing, in a process called soldering.
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soldering
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A process in which a filler metal is melted at temperatures below 840° (450° C) to form a joint between two base metals. Soldering is often used for delicate projects such as jewelry and electronics.
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soldering iron
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A tool used to transfer heat to a metal surface in order to melt solder and form a joint or circuit. Most soldering irons resemble a large pen.
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soldering iron stand
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A non-flammable stand upon which to set a hot soldering iron.
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soldering station
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An all-in-one combination of soldering accessories: soldering iron, iron stand, cleaning pad, energy source. Some stations include fume extractors as well.
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tin
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A silvery white metal that is very soft and has poor strength. Tin is used in soldering alloys.
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tinning
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The action of applying a trace amount of solder to the tip of the soldering iron in order to facilitate the heat transfer process.
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toxic
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Poisonous or harmful. Lead is considered to be highly toxic.
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vapor-phase soldering
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An automated soldering process in which PCBs are put in a chamber with a volatile liquid chemical at the bottom. The chemical is heated to its boiling point to form steam, and the steam heats the solder paste at the bottom of the board.
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water-soluble
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The ability of a substance to dissolve in water.
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wave soldering
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An automated soldering process in which PCBs are loaded onto a conveyor that passes over a vat of molten solder. As the conveyor belt moves, a wave is created with a pump. The bottom of the board hits the crest of the wave, and the solder sticks through capillary action.
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welding
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The joining of two pieces of metal together through the application of heat.
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wetting
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The behavior of a liquid when the liquid contacts a solid surface. Liquids with poor wetting ability tend to form droplets, while liquids with good wetting ability tend to spread out evenly over the solid surface area.
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whiskers
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A crystalline metallurgical phenomenon whereby metal grows tiny, filiform hairs. The effect is primarily seen on elemental metals but also occurs with alloys.
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