Method for producing chromium plated parts, and chromium plating apparatus

A method for producing chromium plated parts comprising the steps of:

• immersing a plurality of workpieces in a chromium plating bath;
• performing a plating treatment by application of a pulse current;
• and
• depositing chromium plating layers, which have a compressive residual stress, on surfaces of the plurality of workpieces,
• wherein a direct current from a plating separation lower limit current density up to a range in which the chromium plating layers have the compressive residual stress is applied only during a downtime of the application of the pulse current, the direct current (DC) being greater than zero ampere, and
• wherein the pulse current is caused to pass through a high-pass filter that allows only a pulse waveform to pass therethrough and the direct current is caused to pass through a low-pass filter that allows only a DC waveform to pass therethrough, and both the pulse current and the direct current are then synthesized,
• wherein a pulse waveform shape that prevents a reverse flow of mutual electric currents is adjusted by a pulsed power supply device, and
• wherein the direct current is adjusted by a DC power supply device to be applied during the downtime of the application of the pulse current.