The present disclosure relates to a welding bead cleaning device with automatic electrolyte replenishment, comprising a host and a cleaning gun, wherein the host comprises a power module, the power module is provided with a power output wire and a ground wire, the cleaning gun is provided with a conductive gun head connected to the power output wire, and a front end of the conductive gun head is provided with flexible structure for absorbing an electrolyte for cleaning a welding bead, wherein the welding bead cleaning device further comprises an electrolyte replenishing device and an electronic control system. In use, the electronic control system drives the electric water pump and water valve to quantitatively deliver the electrolyte to the cleaning gun, so that the flexible structure on the gun can automatically replenish the electrolyte, which eliminates the repeated manual picking action, makes the operation more consistent and improves production efficiency.

The present disclosure relates to a welding bead cleaning device with automatic electrolyte replenishment, comprising a host and a cleaning gun, wherein the host comprises a power module, the power module is provided with a power output wire and a ground wire, the cleaning gun is provided with a conductive gun head connected to the power output wire, and a front end of the conductive gun head is provided with flexible structure for absorbing an electrolyte for cleaning a welding bead, wherein the welding bead cleaning device further comprises an electrolyte replenishing device and an electronic control system. In use, the electronic control system drives the electric water pump and water valve to quantitatively deliver the electrolyte to the cleaning gun, so that the flexible structure on the gun can automatically replenish the electrolyte, which eliminates the repeated manual picking action, makes the operation more consistent and improves production efficiency.

A method and apparatus for removing a coating from a gas turbine engine component enabling repair of the component, including application of a braze alloy, without fluoride ion cleaning uses electrolytic stripping of the component in an alkaline bath with the component acting as an anode and current passing to a conformal cathode.

A method and apparatus for removing a coating from a gas turbine engine component enabling repair of the component, including application of a braze alloy, without fluoride ion cleaning uses electrolytic stripping of the component in an alkaline bath with the component acting as an anode and current passing to a conformal cathode.

An electrode for an electrolytically acting doctor blade (1) for pickling and cleaning both planar and curved metal surfaces, comprising a linear metal element supported on the structure of the doctor blade and electrically connected to the electric circuit for initiating the pickling electrolytic action; a pad made of a felt-like absorbent plastic material, resistant to high temperatures and to the chemicals contained in the electrolytic solution used; characterised in that a the linear metal element consists in a metal wire (8, 38), and a pad (7, 34, 41) having a constant thickness (S), made of a felt-like absorbent plastic material, resistant to high temperatures and to the chemicals contained in the electrolytic solution used, is wrapped therearound; the metal wire being connected to the structure of the doctor blade only at the ends of the doctor blade (25) in the active face of the deformable electrode (2, 20, 33, 35). Different constructive forms of the electrode for doctor blade are described, wherein the metal wire is associated with carbon elements of various shapes to facilitate electrical contact with the pad.

An electrode for an electrolytically acting doctor blade (1) for pickling and cleaning both planar and curved metal surfaces, comprising a linear metal element supported on the structure of the doctor blade and electrically connected to the electric circuit for initiating the pickling electrolytic action; a pad made of a felt-like absorbent plastic material, resistant to high temperatures and to the chemicals contained in the electrolytic solution used; characterised in that a the linear metal element consists in a metal wire (8, 38), and a pad (7, 34, 41) having a constant thickness (S), made of a felt-like absorbent plastic material, resistant to high temperatures and to the chemicals contained in the electrolytic solution used, is wrapped therearound; the metal wire being connected to the structure of the doctor blade only at the ends of the doctor blade (25) in the active face of the deformable electrode (2, 20, 33, 35). Different constructive forms of the electrode for doctor blade are described, wherein the metal wire is associated with carbon elements of various shapes to facilitate electrical contact with the pad.

An electrolytically acting doctor blade for pickling and cleaning curved metal surfaces comprises an electrode (2, 26, 34) embodied by a metal wire (8, 32) around which a pad (7, 30) made of a felt-like absorbent plastic material, resistant to high temperatures and to the chemicals contained in the electrolytic solution used, is wrapped; gripping means of the doctor blade on the electrode over the length of the face (F) of the doctor blade; electrical connection of the ends of the metal wire (8, 32) by means of a power supply electric cable (16) to initiate the electrolytic action; and has the gripping means of the doctor blade (1) on the electrode (2, 26, 34) connected to each other by the means placed alongside, in which the connection section, in the deformable body of the doctor blade (3) which has been made pliable, is oriented towards the face (F) of the doctor blade; a push or pull mechanism acts on the ends (25) of the doctor blade and, to obtain a reaction, with a middle part of the mechanism, connected to the middle part of the deformable body of the doctor blade (3), deforms the face of the doctor blade from rectilinear into the arched, convex or concave conformation, depending on the pull or push on the ends of the doctor blade, with respect to the middle part of the doctor blade, exerted by the said mechanism. Different constructive forms of electrolytically acting doctor blade for pickling and cleaning curved metal surfaces with the use of different deformable electrodes are described.

An electrolytically acting doctor blade for pickling and cleaning curved metal surfaces comprises an electrode (2, 26, 34) embodied by a metal wire (8, 32) around which a pad (7, 30) made of a felt-like absorbent plastic material, resistant to high temperatures and to the chemicals contained in the electrolytic solution used, is wrapped; gripping means of the doctor blade on the electrode over the length of the face (F) of the doctor blade; electrical connection of the ends of the metal wire (8, 32) by means of a power supply electric cable (16) to initiate the electrolytic action; and has the gripping means of the doctor blade (1) on the electrode (2, 26, 34) connected to each other by the means placed alongside, in which the connection section, in the deformable body of the doctor blade (3) which has been made pliable, is oriented towards the face (F) of the doctor blade; a push or pull mechanism acts on the ends (25) of the doctor blade and, to obtain a reaction, with a middle part of the mechanism, connected to the middle part of the deformable body of the doctor blade (3), deforms the face of the doctor blade from rectilinear into the arched, convex or concave conformation, depending on the pull or push on the ends of the doctor blade, with respect to the middle part of the doctor blade, exerted by the said mechanism. Different constructive forms of electrolytically acting doctor blade for pickling and cleaning curved metal surfaces with the use of different deformable electrodes are described.

An embodiment of the present invention relates to a vertical electrolytic device having an improved structure to easily discharge bubbles generated during an electrolysis process that is used for surface modification of a separator of a fuel cell or the like. The vertical electrolytic device according to an aspect of the present invention includes an electrolytic bath in which an electrolyte is stored and an opening is formed in top and bottom portions thereof to allow vertical movement of a strip, wherein the bottom opening is formed to correspond with the strip to prevent discharge of the electrolyte stored in the electrolytic bath; and at least one pair of electrode parts disposed in the electrolytic bath so as to be facing each other on each side of the strip.

A method is provided for pretreating a thick-film aluminum electrode. The pretreatment is processed before subsequent metal plating. the thick-film aluminum electrode is pretreated with a purely mechanical or chemical treatment or a mixture of mechanical and chemical treatments; the chemical treatment is an alkaline/acid washing or a chemical anodizing; The surface of the thick-film aluminum electrode is made even and alumina, a nonconductive substance, on the surface is removed. The thick-film aluminum electrode has a surface with evenness and low oxygen content. The thick-film aluminum electrode has similar quality as the thick-film electrode of noble metal silver for subsequent metal plating.