Provided is a golf shaft, capable of ensuring peeling resistance of a colored layer to endure a bending process and the like. The golf shaft has a metal element tube, and a colored plating layer being a colored layer formed on a surface of the element tube, wherein the colored plating layer has a first strike plating layer on the element tube side, a satin-like plating layer layered on a surface of the first strike plating layer, a second strike plating layer layered on a surface of the satin-like plating layer, and a decorative plating layer layered on a surface of the second strike plating layer and colored according to a color of the colored plating layer.

Provided is a golf shaft, capable of ensuring peeling resistance of a colored layer to endure a bending process and the like. The golf shaft has a metal element tube, and a colored plating layer being a colored layer formed on a surface of the element tube, wherein the colored plating layer has a first strike plating layer on the element tube side, a satin-like plating layer layered on a surface of the first strike plating layer, a second strike plating layer layered on a surface of the satin-like plating layer, and a decorative plating layer layered on a surface of the second strike plating layer and colored according to a color of the colored plating layer.

A method for galvanic application of a surface coating, in particular a chromium coating, to a body, for example a machine component. Before the galvanic application of the surface coating, a layer of a compound that can be oxidized by an electrolyte solution that is used, preferably a polyhydroxy compound with a viscosity of at least 1000 mPas at 25° C., is applied to the body. A method for galvanic application of a surface coating, in particular a chromium coating, to a body, for example a machine component, wherein the surface coating is carried out in a closed reactor in an at least two-stage, preferably three-stage process, is also disclosed. An electrolyte solution contained in the reactor at a temperature T1 for carrying out a subsequent process stage is substituted by an electrolyte solution at a temperature T2≠T1. A device for carrying out this method is also disclosed.

A piston ring for an engine may include a piston ring body. The piston ring body may include a working surface, a lower surface, an upper surface, and an inner surface. An area of the working surface and/or the lower surface which is close to an outer circumferential lower edge of the piston ring body is not provided with a nitride layer, the outer circumferential lower edge is formed with a chamfer, the chamfer does not have a nitride layer, and an additional area of the piston ring has a nitride layer.

The present disclosure provides a micro-rough electrolytic copper foil and a copper clad laminate. The electrolytic copper foil has a micro-rough surface formed with mountain-shaped structures and recessed structures. A multiplication value of an arithmetic mean height (Sa) and a vertex density (Spd) of the mountain-shaped structures measured according to ISO 25178 is between 150000 μm/mm.sup.2 and 400000 μm/mm.sup.2. An arithmetic mean undulation (Wa) of the mountain-shaped structures measured according to JIS B0601:2001 is between 0.06 μm and 1.5 μm. Therefore, the electrolytic copper foil with good binding strength and electrical properties can be obtained.

This invention provides a threaded connection for pipes or tubes having excellent misalignment resistance and high torque on shoulder resistance, and also having excellent corrosion resistance properties, as well as a method for producing the threaded connection for pipes or tubes. The threaded connection for pipes or tubes includes a pin and a box. The pin and the box include contact surfaces having threaded portions and unthreaded metal contact portions. The threaded connection for pipes or tubes includes, on at least one of the contact surfaces of the pin and the box, surface roughness, a Zn—Ni alloy plating layer, a Cu—Sn—Zn alloy plating layer and a solid lubricant coating layer. These are deposited from the contact surface side in the order of: surface roughness, the Zn—Ni alloy plating layer, the Cu—Sn—Zn alloy plating layer and the solid lubricant coating layer.

Described herein are apparatus and methods for the continuous application of nanolaminated materials by electrodeposition.

Described herein are apparatus and methods for the continuous application of nanolaminated materials by electrodeposition.

A container includes: a double wall vacuum insulated body including: an electroplated stainless steel inner surface or a polished stainless steel inner surface; an outer surface including a vacuum port; a mouth located at a top end of the body having a mouth diameter; and a base opening located at a bottom end of the body having a base opening diameter; a removable top cap including a top seal that seals the top opening; and a removable bottom cap including a bottom seal that seals the bottom open.

A container includes: a double wall vacuum insulated body including: an electroplated stainless steel inner surface or a polished stainless steel inner surface; an outer surface including a vacuum port; a mouth located at a top end of the body having a mouth diameter; and a base opening located at a bottom end of the body having a base opening diameter; a removable top cap including a top seal that seals the top opening; and a removable bottom cap including a bottom seal that seals the bottom open.