Brush plating process for repairing piston rod surface damage

1. Dianjing: Select TGY-1 Dianjing, the piston rod is connected to the negative pole (positive connection) of the power supply, and the voltage is 10-14V for 1030s. The purpose of Dianjing is to remove the surface oil film. After cleaning, rinse the residual liquid on the surface of the piston rod with white water.

2. Activation: Use THY-5 activation solution. Connect to the positive pole of the power supply (reverse connection), and energize, the voltage is 12-15V, time is 10-30s. At this time, the surface of the piston rod was silver-gray. The purpose of activation is to remove the oxide film on the surface of the piston rod.

3. Brush plating bottom layer: special nickel plating (TDY101), wipe without electricity for 3-5s. The piston rod is connected to the negative electrode (positive connection) of the power supply, and the voltage is 15-18V. The relative speed of the cathode and anode is 12-15m / min.

4. Brush plating working layer: use fast nickel (TDY102), wipe without electricity for 3-5s. The piston rod is connected to the positive electrode (reverse connection) of the power supply, and the voltage is 15V. The relative speed of the cathode and anode is 12-15m / min. Eliminate stress. Increase strength. When the damage is filled, use metallographic sandpaper. Whetstone sanded its surface and clamped it with a circular arc template for roundness detection.

5. Brush plating final working layer: The piston rod is connected to the positive electrode (reverse connection) of the power supply, and the voltage is 15V. The relative speed of cathode and anode is 12-15m / min. Chrome-plated alloy with a chromium layer thickness of 3-5 μm.

6. Polishing: Use a polishing wheel to polish the brush setting so that its surface roughness is Ra-0.4 μm and the dimensional accuracy meets the requirements.