Prevention of deposits on ceramics

Details Prevention of deposits on ceramics Prevention of deposits on ceramics

2008-05-27

2008-05-27

Carrillo, Sharidan (Department: 1792)

Cleaning and liquid contact with solids

Processes

Using sequentially applied treating agents

C510S238000, C510S504000, C134S028000, C134S029000, C134S036000, C134S042000

Reexamination Certificate

active

07377983

ABSTRACT:
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.

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