Nickel repair of titanium surfaces
The present disclosure includes methods for coating and/or repairing a surface of a titanium metal part. Uncoated or damaged portions of the surface of titanium parts are prepared for coating, followed by applying a first coating. A second coating may then be applied to form a coated or repaired surface. The coated or repaired surface may be machined to produce a finished surface having a predetermined thickness.
1. A method for repairing a damaged titanium surface of a landing gear part comprising:
masking an undamaged titanium surface leaving the damaged titanium surface of the landing gear part exposed, wherein the damaged titanium surface having a depth in the orthogonal direction from the undamaged titanium surface;
applying a base coat of nickel via brush coating electroplating process to the damaged titanium surface to form a prepared damaged surface, wherein the undamaged titanium surface is used as a cathode during the brush coating electroplating process and the base coat comprising a thickness of approximately 0.0005 inches;
applying a nickel first coating to the prepared damaged surface to form a partially repaired surface; and
applying a second coating via an electroless process to the partially repaired surface to form a repaired surface,
wherein the landing gear part comprises a titanium alloy having a composition, in weight percent, of about 6 percent aluminum, about 2 percent tin, about 2 percent zirconium, about 2 percent molybdenum, about 2 percent chromium, about 0.25 percent silicon, and the remainder titanium, and wherein a total thickness of the base coat of nickel, the nickel first coating and the second coating is equal to a thickness of the depth in the orthogonal direction from the undamaged titanium surface.
2. The method of claim 1 , wherein the second coating is nickel.
3. The method of claim 2 , wherein the second coating is a sulfamate nickel coating.
4. The method of claim 1 , wherein the first coating is applied via an electroless process.
5. The method of claim 1 , wherein the repaired surface comprises a thickness that is substantially the same as a thickness of an undamaged surface.
6. The method of claim 1 , further comprising a step of machining the repaired surface to a predetermined thickness to form a finished surface.