Stabilization of sodium/potassium silicate-containing...

Details Stabilization of sodium/potassium silicate-containing... Stabilization of sodium/potassium silicate-containing...

C - Chemistry, Metallurgy

10

M

31/71

C10M 111/04 (2006.01) C10M 103/06 (2006.01)

Patent

CA 1089215

ABSTRACT A coating bath containing sodium and/or potassium silicate is stabilized and its useful life prolonged by the additions of sodium or potassium hydroxide in amounts at least substantially equal to that required to compensate for the amounts of CO2 or CO3 anions introduced into the bath which, in reacting with the hydroxide formed by the hydrolysis of the silicate to form carbonates, upsets the hydrolysis equilibrium leading to further hydrolysis of the silicate. Similarly, a quantity of hydroxide is added to compensate substantially for other reactive species which significantly affect the hydrolysis equilibrium of the silicate.

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