| 摘要 |
<p>Friction members are chromium plated by means of pulsed current electrolytic chromium plating with reversed current according to the following parameters: Ic = average cathode current density; Ia = average anode current density; wherein the current is continuous, chopped or basically continuous with an overlying periodic signal; Tc = cathode pulse length; Ta = anode pulse length; Qc = cathode current amount; Qa = anode current amount; wherein 0.01s « Tc « 200 s and preferably « 50 s; 1 ms « Ta « 100 s and preferably « 7 ms; 20 A/dm2 « Ic « 200 A/dm2; and 1 A/dm2 « Ia « 5 Ic.</p> |
