焊锡工艺中常用的化学药品（Chemicals commonly used in soldering process）.docVIP

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2017-09-02 发布于河南
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焊锡工艺中常用的化学药品（Chemicals commonly used in soldering process）.doc

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焊锡工艺中常用的化学药品（Chemicals commonly used in soldering process）

焊锡工艺中常用的化学药品（Chemicals commonly used in soldering process） In the development of modern industry, the chemical industry occupies a very prominent position. The use of chemical products is becoming more and more popular with the development of science and technology. The production of heavy industry requires the processing of chemical products, and the production of light industry becomes more and more dependent on chemical products. Each industry should know something about the chemical products. The mechanical equipment industry belongs to heavy industry, and it should be understood more about the characteristics of chemical products. Soldering process is widely used in the field of chemical drugs. Hereby, Okada engineers, in order to let customers deepen the understanding of chemical drugs, specially summed up the nature of commonly used chemical drugs. Sulfuric acid: H2SO4- colorless oily liquid, when the specific gravity is 15 degrees centigrade, 1.837 (1.84). Smoke at 30-40 degrees; boil at 290. Concentrated sulfuric acid has a strong water absorption, so it is an excellent desiccant. Nitric acid: HNO3- colorless liquid, the specific gravity of 15 degrees, 1.526, boiling point 86 degrees. Red fuming nitric acid is a reddish brown transparent liquid, caustic strong, heavy smoke in the air and moisture absorption. Hydrochloric acid: HCl- colorless, pungent odor, at 17 degrees centigrade, its specific gravity is 1.264 (for air). Boiling point is -85.2. Easily soluble in water. Gold chloride: red crystal, easy to tide solution. Silver nitrate: AgNO3- colorless rhombic flake crystals, the specific gravity of 4.3551208.5 degrees, melting, burning decomposition. If there is no organic matter present, the light does not work, otherwise it becomes black. Soluble in water and glycerin. Soluble in alcohol, methanol, and isopropyl alcohol. Almost insoluble in nitric acid. Poisonous! Ammonium persulfate: (NH4) 2S2O8-, colorless, slightly green flakes, crystals, dissolved in