Molds & Tooling
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Rapid mold cavity corrosion
Problem Phenomenon
Rust spots or pitting appear on the mold cavity surface
Cause Analysis
PP slightly degrades during processing producing acidic small molecules; the surface treatment agent of the glass fiber contains corrosive components; electrochemistry accelerates corrosion in high-temperature humid environments
Solution
Select corrosion-resistant mold steels (such as S136, H13 and other high-quality steels); hard chrome plating or nitriding treatment on the mold surface; strengthen daily rust prevention maintenance of the mold
Key Takeaway
Mold corrosion not only affects product appearance but may also contaminate the product
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