Prevention of deposits on ceramics

Details Prevention of deposits on ceramics Prevention of deposits on ceramics

C - Chemistry, Metallurgy

11

D

C11D 1/00 (2006.01) C11D 1/835 (2006.01) C11D 1/94 (2006.01) C11D 3/00 (2006.01)

Patent

CA 2582936

A method to prevent deposits on a ceramic surface comprising: (1) pretreating the surface by applying an aqueous solution containing from about 200 ppm to about 1000 ppm by weight of an amphoteric fluorosurfactant, and (2) periodically applying an aqueous maintenance solution comprising from about 1 ppm to about 200 ppm of at least one of an amphoteric or cationic fluorosurfactant or a mixture thereof, from about 5 ppm to about 100 ppm of a sequestering acid, and from about 2.5 ppm to about 200 ppm of a quaternary ammonium biocide compound, wherein all concentrations are by weight of aqueous solution is disclosed.

L'invention concerne un procédé de prévention de dépôts sur une surface en céramique consistant: (1) à pré-traiter la surface par application d'une solution aqueuse contenant environ 200 ppm à environ 1000 ppm en poids d'un tensioactif fluoré amphotère, et (2) à appliquer périodiquement une solution d'entretien aqueuse renfermant environ 1 ppm à environ 200 ppm d'au moins un tensioactif fluoré amphotère ou cationique ou bien un mélange de celle-ci, environ 5 ppm à environ 100 ppm d'un acide séquestrant et environ 2,5 ppm à environ 200 ppm d'un composé biocide d'ammonium quaternaire, toutes les concentrations étant exprimées en poids de solution aqueuse.

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