Aqueous composition for the chemical removal of metallic surfacing present on turbine blades, and its use
OwnerMarco Anselmi, Alessio Bandini +2inventors
InventorsMarco Anselmi, Alessio Bandini, Marco Stefanelli, Lawrence Kool
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Abstract
An aqueous composition for the chemical removal of metallic surfacing present on the blades of turbines, preferably gas turbines, comprises at least hexafluorosilicic acid and phosphoric acid.
Claims8
An aqueous composition for the chemical removal of metallic surfacing present on blades of turbines comprising at least hexafluorosilicic acid and phosphoric acid whose final composition corresponds to that which can be obtained by mixing an aqueous solution of hexafluorosilicic acid at about 34% in a quantity varying from 46% to 86% by volume with an aqueous solution of phosphoric acid at about 75% in a quantity varying from 19% to 49% by volume.
An aqueous composition for the chemical removal of metallic surfacing present on the blades of turbines comprising at least hexafluorosilicic acid and phosphoric acid in the following concentrations:
- hexafluorosilicic acid from 156.4 g/l to 292.4 and phosphoric acid from 142.5 g/l to 367.5 g/l.
Use of the aqueous composition according to any of the previous claims for the removal of metallic surfacing on gas turbine blades.
Dependencies are inferred from the claim text.