The threaded connection for pipes includes a pin, a box and a Zn—Ni alloy plating layer. The pin has a pin-side contact surface that includes a pin-side thread part. The box has a box-side contact surface that includes a box-side thread part. The Zn—Ni alloy plating layer is formed on at least one of the pin-side contact surface and the box-side contact surface. The Zn—Ni alloy plating layer is consisting of Zn, Ni, trace amount of Cr and impurities. The trace amount of Cr content of the Zn—Ni alloy plating layer is 5.0×10 counts/sec or more in terms of Cr intensity as measured by secondary ion mass spectrometry using O.sub.2.sup.+ ions as bombarding ions.

The threaded connection for pipes includes a pin, a box and a Zn—Ni alloy plating layer. The pin has a pin-side contact surface that includes a pin-side thread part. The box has a box-side contact surface that includes a box-side thread part. The Zn—Ni alloy plating layer is formed on at least one of the pin-side contact surface and the box-side contact surface. The Zn—Ni alloy plating layer is consisting of Zn, Ni, trace amount of Cr and impurities. The trace amount of Cr content of the Zn—Ni alloy plating layer is 5.0×10 counts/sec or more in terms of Cr intensity as measured by secondary ion mass spectrometry using O.sub.2.sup.+ ions as bombarding ions.

Systems for masking and sealing a component for surface treatment. A system includes a pair of fixture plates disposed on opposite ends of the component from each other. One or more inner sleeves are inserted into the component to mask and seal at least a portion of the component. An outer sleeve extends between the fixture plates to seal outside of the component. A pair of fixture rods extend between the first and second fixture plates and couple the first and second fixture plates together. The system is configured to effect surface treatment of an exposed area of the component, at least a portion of the exposed area defined by and disposed adjacent to the one or more inner sleeves.

The present disclosure provides a gas-solid separation structure including: a feeding pipeline including a first feeding part, a second feeding part and a first valve disposed between the first and second feeding parts; a discharge pipeline having a first opening and a second opening opposite to each other, the second feeding part extending into the discharge pipeline via the first opening; wherein an exhaust channel is formed between the second feeding part and the discharge pipeline, exhaust holes are formed in a portion of the discharge pipeline opposite to the second feeding part, and the exhaust channel is in communication with the exhaust holes. The present disclosure further provides a feeding device and an electrochemical deposition apparatus. The present disclosure can improve the problem of interference with medicine powder release caused by gases entering the discharge pipeline.

An apparatus and system for in-situ electropolishing and/or for in-situ electroforming a structural or functional reinforcement layer such as a sleeve of a selected metallic material on the internal surfaces of metallic tubular conduits are described. The apparatus and system can be employed on straight tubes, tube joints to different diameter tubes or face plates, tube elbows and other complex shapes encountered in piping systems. The apparatus includes components which can be independently manipulated and assembled on or near a degraded site and, after secured in place, form an electrolytic cell within the workpiece. The apparatus contains counter-electrodes which can be moved relative to the workpiece surface during the electroplating and/or electropolishing operation to provide flexibility in selecting and employing electropolishing process parameters and electroplating process parameters to design and optimize the surface roughness as well as the size, shape and properties of the electrodeposited reinforcing layer(s).

An apparatus and system for in-situ electropolishing and/or for in-situ electroforming a structural or functional reinforcement layer such as a sleeve of a selected metallic material on the internal surfaces of metallic tubular conduits are described. The apparatus and system can be employed on straight tubes, tube joints to different diameter tubes or face plates, tube elbows and other complex shapes encountered in piping systems. The apparatus includes components which can be independently manipulated and assembled on or near a degraded site and, after secured in place, form an electrolytic cell within the workpiece. The apparatus contains counter-electrodes which can be moved relative to the workpiece surface during the electroplating and/or electropolishing operation to provide flexibility in selecting and employing electropolishing process parameters and electroplating process parameters to design and optimize the surface roughness as well as the size, shape and properties of the electrodeposited reinforcing layer(s).

The composition according to the present disclosure is a composition for forming a lubricant coating layer on or above a threaded connection for pipes, and contains polyisobutylene, a metal soap, a wax and a basic metal salt of an aromatic organic acid. The threaded connection for pipes according to the present disclosure includes: a pin having a pin-side contact surface which includes a pin-side threaded portion; a box having a box-side contact surface which includes a box-side threaded portion; and a lubricant coating layer formed from the aforementioned composition as an outermost layer on or above at least one of the pin-side contact surface and the box-side contact surface.

Disclosed are an electroplating repair apparatus, an electroplating repair system having the same, and an operating system thereof. The apparatus includes a probe body extending a predefined length in a structure corresponding to an inner diameter part of a tube, an electroplating electrode attached to and surrounding an outer circumferential surface of the probe body, a sealing member attached to opposite end sides of the probe body to seal a target portion to be electroplated, and a solution supply line supplying a solution to the target portion through the inside of the probe body, wherein the apparatus has a structure capable of wholly repairing the inside of the tube including a sealing welding part and an expanded part.

Disclosed are an electroplating repair apparatus, an electroplating repair system having the same, and an operating system thereof. The apparatus includes a probe body extending a predefined length in a structure corresponding to an inner diameter part of a tube, an electroplating electrode attached to and surrounding an outer circumferential surface of the probe body, a sealing member attached to opposite end sides of the probe body to seal a target portion to be electroplated, and a solution supply line supplying a solution to the target portion through the inside of the probe body, wherein the apparatus has a structure capable of wholly repairing the inside of the tube including a sealing welding part and an expanded part.

An article and method for forming a coated metal pipe for use as an automotive fluid transport tube including a copper plated carbon steel tubing formed into a circular cross sectional profile. At least one intermediate layer including any of a corrosion inhibiting zinc/aluminum alloy, electroplated zinc or hot dip aluminum is applied over said tubing. One or more outer polymer or copolymer layers are applied over the intermediate layer, with the outer layer or multi-layers compounded with a graphene or graphene oxide powder.