A souder Tin Materiau Pate Carton Colophane Fer Souder Brasure Tendre De Soudage Reparation Fluxe | Электроника

A souder Tin Materiau Pate Carton Colophane Fer Souder Brasure Tendre De Soudage Reparation Fluxe | Электроника

* product description *

Product type: Rosin pictures are for reference only. Different manufacturers will have different packaging.

Commodity specification: carton

Product fineness: brand new

Product Description:

Rosin is a yellowish to yellowish-red transparent solid with softening point 70-90 C, specific gravity 1.070-1.085, heat of dissolution 15.8 kcal/kg, heat capacity 0.54 kcal/kg (?), thermal conductivity 0.11 kcal/m (?) h (?), volume resistivity 5 (?) 1016_cm, flash point 216 (?). Rosin also has crystallization characteristics, easy to produce crystallization phenomenon, in acetone and other organic solvents will have a crystallization trend, the critical crystallization temperature is about 100, crystalline rosin melting point is 110 ~ 135, and difficult to saponify. In addition, rosin also has optical rotation, rosin specific rotation between 0 to 15 degrees (optimum point + 7 degrees) is the crystalline phenomenon and the crystalline trend of the lowest rosin.

1. the peculiar smell of pine forests.

2. alias of pine oleoresin.

3. refers to substances distilled after pine resin. Solid, transparent, insoluble in water, soluble in alcohol, hard, brittle, yellowish or brown. It is an industrial raw material for making paints, soap, paper, matches, etc.

4. Rosin is the oil from the trunk of pine trees melted into water by high temperature, and then dried into lumpy solid (without fixed melting point). Its color is burnt yellow and dark red. It is an important chemical raw material. In daily life, rosin is mainly used as a flux in circuit board welding. In musical instruments, rosin is smeared on the bow of Erhu, violin, horse-head Violin and other strings. Hair is used to increase the friction between the bow hair and the string.

Product function

1. addition to oxide film. Essentially, the substance in the flux is reduced to remove the oxide film, and the reaction product becomes suspended slag, floating on the surface of the solder.

2. prevent oxidation. After melting, it floats on the surface of the solder to form an isolation layer, thus preventing the oxidation of the welding surface.

3. reduce surface tension. Increasing solder fluidity is conducive to solder wetting.