Material Drying
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PA66 radiator water tank
Problem Phenomenon
The radiator water tank cracks after long-term immersion in coolant
Cause Analysis
High-temperature ethylene glycol coolant causes PA66 hydrolysis and glass fiber interface erosion, and strength decays year by year; during on-site troubleshooting, verify item by item according to this mechanism, avoiding blindly adjusting the machine based only on experience
Solution
Select hydrolysis-resistant reinforced special grades; verify by long-term immersion in 135℃ coolant; reserve corrosion allowance for water tank wall thickness; after adjustment, take continuous samples to verify the effect, confirm stability before resuming mass production
Key Takeaway
Water tank material selection is based on hydrolysis-resistant grades plus long-term medium verification; after confirming effectiveness, fix the parameters and practices into the work instructions to prevent recurrence; include this case in the defect archive as a troubleshooting reference for subsequent similar problems
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