Method for removing oxides and coatings from a substrate

Details Method for removing oxides and coatings from a substrate Method for removing oxides and coatings from a substrate

2005-03-08

2005-03-08

Markoff, Alexander (Department: 1746)

Cleaning and liquid contact with solids

Processes

For metallic, siliceous, or calcareous basework, including...

C134S041000

Reexamination Certificate

active

06863738

ABSTRACT:
A method for selectively removing oxide material from the surface of a substrate or coating disposed on the substrate is disclosed. The method includes the step of contacting the oxide material with an aqueous treatment composition having the formula HxAF6, wherein A can be Si, Ge, Ti, Zr, Al, and Ga; and x is 1-6. The composition can sometimes include an additional acid, such as phosphoric acid, nitric acid, sulfuric acid, hydrochloric acid, hydrofluoric acid, and mixtures thereof. A method for replacing a worn or damaged protective coating applied over a substrate, utilizing the treatment composition, is also described.

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