Patent ID: 8322754

Claim:
A threaded joint, comprising: a pin member and a box member, wherein the pin member possesses a first thread portion adapted to mate with a second thread portion of the box member; a first coating composition deposited on the thread portion of at least one of the pin and box members, comprising: a polymer selected from the group consisting of epoxies and polyimides; about 0.5 to about 15 wt. % of a perfluoropolyether; about 5 to about 15 wt. % of at least one of an anticorrosion compound selected from the group consisting of a zinc calcium strontium orthophosphate silicate hydrate compound, a zinc calcium aluminum strontium orthophosphate polyphosphate silicate hydrate, a zinc aluminum molybdenum orthophosphate hydrate, a zinc nitroisophthalate, and a zinc phosphomolybdate; and about 10 to about 15 wt. % of an adhesion additive comprising zinc oxide having a mean diameter ranging between approximately 10 nm to approximately 10 μm, said zinc oxide provided in an effective amount to promote adhesion of the first coating composition to the thread portion; wherein the balance of the first coating composition is comprised of the polymer and wherein the percentage of each component is on the basis of the total weight of the first coating composition.