Coating for components requiring hydrogen peroxide...

Stock material or miscellaneous articles – Composite – Of inorganic material

Reexamination Certificate

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C244S13500B, C060S205000, C060S251000, C060S257000, C060S772000, C427S255360, C427S255394

Reexamination Certificate

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07824783

ABSTRACT:
The present invention provides a heretofore-unknown use for zirconium nitride as a hydrogen peroxide compatible protective coating that was discovered to be useful to protect components that catalyze the decomposition of hydrogen peroxide or corrode when exposed to hydrogen peroxide. A zirconium nitride coating of the invention may be applied to a variety of substrates (e.g., metals) using art-recognized techniques, such as plasma vapor deposition. The present invention further provides components and articles of manufacture having hydrogen peroxide compatibility, particularly components for use in aerospace and industrial manufacturing applications. The zirconium nitride barrier coating of the invention provides protection from corrosion by reaction with hydrogen peroxide, as well as prevention of hydrogen peroxide decomposition.

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patent: 6314719 (2001-11-01), Hunt et al.
patent: 6887821 (2005-05-01), Mays et al.
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patent: 6949152 (2005-09-01), Hallit et al.
patent: 6968695 (2005-11-01), Schmotolocha et al.
patent: 2002/0058107 (2002-05-01), Fareed et al.
“Hydrogen Peroxide Technical Bulletin,” FMC Corporation, Philadelphia, Pennsylvania (2002).
“Zirconium in Hydrogen Peroxide Applications,” Wah Chang (Allegheny Technologies, Inc.), Albany, Oregon (2003).
“Materials of Construction for the Storage of Hydrogen Peroxide,” Solvay Chemicals, Inc., Longview, Washington (2004).

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