Loading patent…
OwnerManuel G. Koucouthakis, Laurie A. Booker +2inventors
InventorsManuel G. Koucouthakis, Laurie A. Booker, Michelle L. Shreve, Terence B. Walker
Estimating the term…
Brake disc with carbon composite body, wherein the surface of the brake disc is at least partially covered by a layer of an antioxidant composition that can be visualized by viewing it under “blacklight”. The brake disc of may be processed, before being incorporated into a brake system, to remove antioxidant composition that covers the working surface of the disc. An antioxidant coating composition may include from 10-75 wt % H2O, 20-65 wt % H3PO4, 0.1-20 wt % alkali metal mono-, di-, or tri-basic phosphate, 0-2 wt % hydrated boron oxide, 0-18 wt % KH2PO4, 3-10 wt % of a transition metal oxide, and 1-20 wt % zinc sulfide.
An antioxidant coating composition comprising from 10-75 wt % H20, 20-65 wt % H3PO4, 0.1-20 wt % alkali metal mono-, di-, or tri-basic phosphate, 0-2 wt % hydrated boron oxide, 0-18 wt % KH2PO4, 3-10 wt % of a transition metal oxide, and 1-20 wt % zinc sulfide.
A brake disc comprising a carbon composite article, the surface of which article has been treated with an antioxidant coating which contains from about 1 through about 20 weight-% of zinc sulfide, wherein said zinc sulfide is visible under blacklight.
A method for protecting a carbon composite friction article against oxidative weight loss, which method comprises treating the surface of the composite article with an antioxidant coating which contains from about 1 through about 20 weight-% of zinc sulfide, wherein the antioxidant coating is visible under blacklight.
Dependencies are inferred from the claim text.