I. Importance of Liquid Cold Plate Cleaning
The cleanliness of internal flow channels in liquid cold plates directly impacts heat dissipation efficiency and system reliability. Contaminants may cause:
Micro-channel blockage and degraded thermal performance
Reduced heat exchange efficiency (cleaning required when temperature difference >1.5°C)
Increased risk of system failures
Technical Parameter Confirmation: Material (aluminum alloy/copper/stainless steel), structural type (straight plate/serpentine channel/micro-channel)
Contamination Analysis: Cutting fluids, lubricating oils, metal debris, oxides, weld slag, dust fibers, etc.
Accessory Removal: Dismount connectors, O-rings, and other detachable components
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| Cleaning Method | Applicable Scenario | Technical Key Points |
|---|---|---|
| Ultrasonic Cleaning | Complex structures, deep holes and blind holes | Multi-tank coordination, adjustable frequency and duration, suitable for batch processing |
| Pressure Spray Cleaning | Particulate contaminants in flow channels | High-pressure water jet rinsing to remove residues and impurities |
| Laser Cleaning | Precision cleaning of welded areas | Area-controllable, contactless, consumable-free, environmentally friendly, suitable for automated production lines |
| Chemical Cleaning | Oil and oxide removal | 5% citric acid solution circulation cleaning (50°C, flow rate 1.5 m/s) |
| Flow-Through Cleaning | Comprehensive internal flow channel cleaning | Combined with cleaning agent circulation to ensure dead-angle cleaning |
Rough Cleaning/Degreasing → Internal Deburring → Precision Cleaning & Rinsing → Surface Treatment/Passivation → Drying
Detailed Steps:
Rough Cleaning/Degreasing: Ultrasonic cleaning or spray cleaning to remove oil stains and cutting fluids (water-based or organic solvents)
Internal Processing: Chemical polishing, electrochemical polishing, or abrasive flow machining (ABF) to remove burrs and reduce flow resistance
Precision Cleaning: Pure water spray and ultrasonic rinsing to remove all contaminants and cleaning agent residues
Surface Treatment: Chemical conversion coating/passivation, anodizing to enhance corrosion resistance
Drying: Hot air drying or vacuum drying to thoroughly remove moisture
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