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US 2013/0171463 A1Published application
Load bearing member having protective coating and method therefor
AssigneeOtis Elevator Company
InventorsXiaoyuan Chang, Hong Yang
Life of this patent
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Abstract
A load bearing member includes at least one elongated tension member having at least one wire and a protective coating on the elongated tension member. The protective coating includes a first corrosion inhibitor having an oxide-forming metal, a second corrosion inhibitor having a rare earth metal, and a third corrosion inhibitor having an organic material.
Claims24
A load bearing member, comprising:
- at least one elongated tension member comprising at least one wire;
- and
- a protective coating on the elongated tension member, the protective coating including a first corrosion inhibitor selected from a group consisting of oxide-forming metals and combinations thereof, a second corrosion inhibitor selected from a group consisting of rare earth metals and combinations thereof, and a third corrosion inhibitor comprising an organic material.
A method for treating a load bearing member, the method comprising:
- treating at least one elongated tension member having at least one wire with a corrosion inhibitor solution that includes a first corrosion inhibitor selected from a group consisting of oxide-forming metal salts and combinations thereof, a second corrosion inhibitor selected from a group consisting of rare earth metal salts and combinations thereof, and a third corrosion inhibitor selected from a group consisting of organic salts and combination thereof to produce a multifunctional protective coating on the at least one elongated tension member.
Dependencies are inferred from the claim text.