Sunday, November 17, 2013

The main purpose of the Sodium fluoride



Sodium fluoride: shine colorless crystals or white powder, specific gravity 2.25, melting point 993 ℃ the boiling point of 1695 ℃. Soluble in water (20 ° C solubility 10 ° C 3.66, 4.06, 4.22, 40 °, 30 ° C C 4.4, 60 ° C 4.68, 4.89, 100 °, 80 ° C C5.08), hydrofluoric acid, slightly dissolve into alcohol. Weakly alkaline aqueous solution, but soluble in hydrofluoric acid and hydrogen fluoride sodium, can corrode the glass. Poisonous!
Main application: in coating industry for phosphating accelerator, stability of the phosphating liquid and phosphating refinement, improvement of phosphating film performance. Aluminum and its alloy phosphating damaging, closed a large negative catalysis of Al3 +, phosphating smoothly wood preservative, agricultural pesticides, fungicides, medicine, preservatives, welding flux, alkaline zincate galvanized additive and enamel, paper industry, etc.


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