Solder Fluxes

CoF is used for the replacement of hydrogen with fluorine in halocarbons (5) for fluorination of xylylalkanes, used in vapor-phase soldering fluxes (6) formation of dibutyl decalins (7) fluorination of alkynes (8) synthesis of unsaturated or partially fluorinated compounds (9—11) and conversion of aromatic compounds to perfluorocycHc compounds (see Fluorine compounds, organic). CoF rarely causes polymerization of hydrocarbons. CoF is also used for the conversion of metal oxides to higher valency metal fluorides, eg, in the assay of uranium ore (12). It is also used in the manufacture of nitrogen fluoride, NF, from ammonia (13). 

The fumes of zinc chloride are highly toxic and can damage mucous membranes and cause pale gray cyanation. It can also ulcerate the skin of workers using it as a soldering flux or those handling wood impregnated with it (59). 

Resin acids in rosin (colophony) solder flux fume Lab method using gas chromatography 83... 

EH 65/31 Rosm-based solder flux fume criteria document for an OEL... 

Controlling health nsks from rosin (colophony) based solder fluxes How HSE assesses offshore safety cases WASP - Quality assurance for chemical analysis... 

Although inhibitors are deliberately added to the silicone formulation to control cure rate, unwanted cure inhibition can be caused by other species that react to form strong complexes with the platinum catalyst. Most notable of these undesired inhibitors include organotin and other organometallic compounds, sulfur, polysulfides, polysulfones or other sulfur-containing materials, amines, urethanes or amine-containing materials, unsaturated hydrocarbons in plasticizers, and some solder flux residues. 

The solder (2% tin-98% lead) was molded into test specimens with a 1.27 cm diameter reduced section. The soldered lap joint specimens were prepared from the tinplate and solder. A solder flux was applied... 

Because of its ability to react with metal oxides, NH4C1 has been used as a soldering flux for many years. Removing the oxide on the surface of the object allows a strong joint to be produced. In older nomenclature, NH4C1 was known as sal ammoniac. 

Borax has been used as a soldering flux for many centuries. It was hauled from the mines in wagons pulled by teams of 20 mules which is the basis for "20-Mule Team" borax that is used in laundry products. 

Noncontact printing is used in the microelectronics industry to print low-viscosity electronic-grade materials solder fluxes, dielectric films, anti-static... 

Lithium Fluoride (Li + F —> LiF) is used to produce ceramics and rocket fuel and is used as welding and soldering flux and in hght-sensitive scientific instruments (e.g., X-ray diffraction, which is the scattering of X-rays by crystals that produce a specific pattern of that crystal s atoms, thus producing a technique for identifying different elements). 

Molybdenum pentachloride (MoGl ) is used as a brazing and soldering flux and to make fire-retardant resins. 

Uses. Cryoscopy organic synthesis general solvent lacquers explosives, soldering flux wetting agent plasticizer... 

Two cases of occupational asthma caused by exposure to soft, corrosive soldering fluxes have been reported. The first case involved a 56-year-old man who developed chest tightness and wheeze 18 months after beginning work... 

Weir DC, Robertson AS, Jones S, Burge PS Occupational asthma due to soft corrosive soldering fluxes containing zinc chloride and ammonium chloride. Ti or x44 220-223, 1989... 

Boron trichloride is used as a catalyst in polymerization reactions. Other applications include refining of alloys soldering flux and as a component in certain fire extinguishers. It also is used to prepare boron libers and other boron compounds including diborane, sodium borohydride and several adducts. 

Lithium chloride is used in the production of lithium metal by electrolysis. It also is used in metallurgy as a eutectic melting composition with potassium chloride (LiCl 41 mol% KCl 59 mol%). Other applications are in low temperature dry-cell batteries as a dehumidifier in air conditioning in welding and soldering flux as a desiccant in fireworks and in mineral waters and soft drinks. 

---