Electro plating device

An electro plating device which forms an electro plating layer on a surface of a female screw carved on an inner circumferential surface of a pipe end of a steel pipe, the electro plating device comprising:

• a pipe inside seal mechanism which occludes an inner channel of the steel pipe at a position distanced from the female screw in a pipe axial direction of the steel pipe;
• a tubular insoluble electrode which is disposed in the pipe end so as to be opposite to the female screw;
• a plating solution feed mechanism which includes a plurality of nozzles which extend radially with a pipe axis of the steel pipe as a center, and is disposed outside the pipe end;
• and
• a pipe end seal mechanism which accommodates the nozzles thereinside and is mounted to the pipe end in a state where the pipe end seal mechanism closely contacts an outer circumferential surface of the pipe end,
• wherein when viewed in the pipe axial direction,
• a tip of each of the nozzles is positioned between the female screw and the insoluble electrode, and
• each of the nozzles injects the plating solution from an injection port formed on the tip toward a direction which intersects an extension direction of the nozzle, the direction being a rotational direction of a clockwise direction or a counterclockwise direction in which the pipe axis is the center, and
• wherein the tip of each of the nozzles is positioned at an outer portion of the steel pipe from a tip of the female screw in the pipe axial direction of the steel pipe.