Threaded Connection for Pipes and Method for Producing Threaded Connection for Pipes

A method for producing a threaded connection for pipes, comprising the steps of:

• preparing a pin having a pin-side contact surface including a pin-side thread part, and a box having a box-side contact surface including a box-side thread part, and immersing at least one of the pin-side contact surface and the box-side contact surface in a plating solution that contains zinc ions, nickel ions and chromium ions, wherein a concentration of the chromium ions is 30 to 2000 ppm;
• and
• conducting a current through at least one of the pin-side contact surface and the box-side contact surface that is immersed in the plating solution to form a Zn—Ni alloy plating layer on at least one of the pin-side contact surface and the box-side contact surface.