Fluoride-containing coating and coated member

Details Fluoride-containing coating and coated member Fluoride-containing coating and coated member

2003-12-18

2008-12-09

Speer, Timothy M (Department: 1794)

Stock material or miscellaneous articles

Composite

Of inorganic material

C428S432000, C428S469000, C428S701000, C428S702000, C428S698000, C428S457000

Reexamination Certificate

active

07462407

ABSTRACT:
A Group IIIA element fluoride-containing coating comprising a Group IIIA element fluoride phase which contains at least 50% of a crystalline phase of the orthorhombic system belonging to space group Pnma is formed on a member for imparting corrosion resistance so that the member may be used in a corrosive halogen species-containing atmosphere. When the state of a crystalline phase is properly controlled, the coating experiences only a little color change by corrosion. A Group IIIA element fluoride-containing coating having a micro-Vickers hardness Hv of at least 100 is minimized in weight loss by-corrosion.

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