silicofluoride การใช้

Chemical reaction in manufacturing sodium fluoride ( NaF ) from Sodium fluorosilicate / Sodium silicofluoride ( Na 2 SiF 6 ) Preceding contribs)
Iridite 14-2, a chromate conversion coating for aluminum, contains chromium ( IV ) oxide, barium nitrate, sodium silicofluoride and ferricyanide.
In the U . S ., about 40, 000 tons of fluorosilicic acid is recovered from phosphoric acid plants, and then used primarily in water fluoridation, sometimes after being processed into sodium silicofluoride.
Like other common water additives such as chlorine, hydrofluosilicic acid and sodium silicofluoride decrease pH and cause a small increase of corrosivity, but this problem is easily addressed by increasing the pH . Trace levels of arsenic and lead may be present in fluoride compounds added to water; however, concentrations are below measurement limits.
Like other common water additives such as chlorine, hydrofluosilicic acid and sodium silicofluoride decrease pH and cause a small increase of corrosivity, but this problem is easily addressed by increasing the pH . Trace levels of arsenic and lead may be present in fluoride compounds added to water, but no credible evidence exists that their presence is of concern : concentrations are below measurement limits.