Molds & Tooling
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Pitting on the mold cavity
Problem Phenomenon
After long-term PEI processing, dotted corrosion pits appear on the mold cavity surface
Cause Analysis
PEI may release trace amounts of corrosive substances during high-temperature (>380°C) processing; high temperature accelerates the corrosion reaction rate
Solution
Use mold steels with excellent corrosion resistance (such as S136, 420 stainless steel, etc.); nitriding or PVD coating protection on the mold surface
Key Takeaway
PEI processing has a certain chemical corrosiveness on molds, requiring corrosion-resistant mold materials
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