Uniformity: Ensure that the inner wall is uniformly plated to avoid localised over-thickness or over-thinness. Maintenance of electrolyte: Filter and adjust the composition regularly to maintain stability. Safety: Wear protective equipment during operation and avoid contact with hazardous substances. Through these steps, hard chrome can be successfully plated on the inner wall of oil pumping ba
How to electroplate hard chrome on the inner wall of pumping barrels
Author: Robby
The steps of electroplating hard chrome on the inner wall of pumping oil pump barrel are as follows:
1. Surface pre-treatment
Cleaning: Remove oil, rust and impurities, commonly used alkaline or acidic cleaning agent.
Sand blasting or polishing: increase the surface roughness and enhance the adhesion of the plating layer.
2. Plating equipment preparation
Electroplating tank: Choose the tank that suits the size of the pump barrel.
Anode: Use lead or lead alloy anode.
Electrolyte: Use electrolyte containing chromic acid and sulfuric acid.
3. Electroplating process
Hanger design: Ensure that the inner wall of the pump barrel is in uniform contact with the electrolyte, and use auxiliary anodes if necessary.
Electrolyte control: Maintain temperature at 50-60°C and current density at 20-60 A/dm².
Plating time: Adjust the time according to the desired thickness (typically 50-200 microns).
4. Post-treatment
Cleaning: Thoroughly clean after plating to remove residual electrolyte.
Drying: to prevent water damage and corrosion.
5. Quality Inspection
Thickness Measurement: Plating thickness is checked using a thickness gauge.
Adhesion test: Adhesion is detected by scratching or bending test.
Hardness test: Use a hardness tester to test the hardness of the plated layer.
6. Attention
Uniformity: Ensure that the inner wall is uniformly plated to avoid localised over-thickness or over-thinness.
Maintenance of electrolyte: Filter and adjust the composition regularly to maintain stability.
Safety: Wear protective equipment during operation and avoid contact with hazardous substances.
Through these steps, hard chrome can be successfully plated on the inner wall of oil pumping barrel to enhance its wear resistance and corrosion resistance.