A method for repairing a blade wherein the blade comprises a metallic substrate shaped to define an airfoil having a tip. A coating is on the tip. The method comprises: machining to at least partially remove the coating; plating a nickel-based base layer; and plating an abrasive layer comprising a nickel-based matrix and an abrasive.

A method for electrodepositing a coating/free-standing layer on a workpiece in an electrolytic cell includes moving the workpiece and an anode applicator tool having a consumable anode insert relative to each other; anodically dissolving a metal from the insert and cathodically depositing the metal on the workpiece; providing flow of electrolyte solution through the insert to ensure that greater than 90% of the anodic reaction is represented by dissolution of the metal; recirculating collected electrolyte solution exiting the electrolytic cell through the insert; applying an electric current to the electrolytic cell; maintaining a concentration of the anodically dissolved metal within 25% of each Ampere-hour per liter of electroplating solution; and creating a cathodic electrodeposit on the workpiece which includes the anodically dissolved metal, the chemical composition of the deposit varying by less than 25% in the deposition direction over a selected thickness of up to 25 microns of the deposit.

A method of repairing a workpiece that comprises a structural material, the method comprising: applying a current to an electrolyte comprising a repair material so as to electroplate the repair material onto a fracture of the workpiece and onto a plating region proximate to the fracture of the workpiece so as to give rise to a repaired workpiece, the plating region defining an exposed area A.sub.e about the fracture, the workpiece defining a cross-section area A.sub.m at the fracture, A.sub.e/A.sub.m is in the range of from about 10 to about 150, the plating being accomplished such that the healed workpiece exhibits a tensile strength .sub.U that is within about 20% of a corresponding tensile strength .sub.M of a corresponding pristine workpiece, and optionally, at least one of the structural material and the repair material comprising at least one metal.

The disclosure provides a method comprising inducing a first current between a source of a countercharge and a first electrode, the first current being through an electrolyte. In some instances, the first current is not present. A second current, in the form of waveform, is induced across the first electrode, the second current being transverse to the first current, and the second current inducing a relativistic charge across the first electrode. Metal from the electrolyte is deposited on the substrate or corroded from the substrate, among other things. The methods, as well as associated apparatus, improve deposition, bonding, corrosion, and other effects.

The disclosure provides a method comprising inducing a first current between a source of a countercharge and a first electrode, the first current being through an electrolyte. A second current is induced across the first electrode, the second current being transverse to the first current, and the second current inducing a relativistic charge across the first electrode.

A method used to repair a workpiece through a combination of laser and an electrochemical reaction is provided. A tool anode is arranged on the back side of the workpiece and is spaced therefrom. A laser beam is focused on an outer surface of the workpiece to realize localized repairing on the back side. The method realizes localized coating repairing on the back side of the workpiece through coordination between the thermal effect of the laser and the electrochemical deposition based on the characteristic of high thermal conductivity of the workpiece. The electrodeposition reaction does not occur in regions that do not need to be repaired. The operating process is simple, the cost of the plating solution is largely reduced, and the problem that the coating on the inner wall of the thin-walled workpiece is difficult to repair due to stripping is solved.

Disclosed is a method for self-repairing of damage to an inorganic protective layer on a metal surface. The method includes: placing a metal with the inorganic protective layer having a damaged surface in a chloride ion solution, and performing self-repairing, wherein the metal with the inorganic protective layer comprises a metal substrate and a layered double hydroxide protective layer intercalated by acid anions covering a surface of the metal substrate; and the acid anions are selected from the group consisting of phosphate anions and molybdate anions.

The disclosure provides a method comprising inducing a first current between a source of a countercharge and a first electrode, the first current being through an electrolyte. A second current is induced across the first electrode, the second current being transverse to the first current, and the second current inducing a relativistic charge across the first electrode.

A repair instruction device is provided with a shape measurement unit configured to determine an additional target shape by measuring a shape of a repair target portion in a repair target object; a current distribution prediction unit configured to assume a gel material for electroplating to be applied to the repair target portion and an electrode, and calculate a current distribution at the repair target portion; a repair design unit and repair disposition position instruction unit configured to determine shapes and positions of the gel material and the electrode based on the additional target shape and the current distribution; and an output unit configured to output an electroplating application condition including the shapes of the gel material and the electrode, the positions of the gel material and the electrode, a current value, and an impressing time.