Processing Machinery
3 Aufrufe
Severe screw corrosion during processing of flame retardant blend systems
Problembeschreibung
Corrosion pits appear on the screw and barrel of halogen-containing flame retardant systems
Ursachenanalyse
Halogen-containing flame retardants decompose at processing temperature, releasing HX (hydrogen halide) acidic gas; the acidic gas reacts with metal at high temperature
Lösung
Switch to halogen-free flame retardant systems (phosphorus-based, nitrogen-based, intumescent); use bimetallic corrosion-resistant screws and barrels; add acid absorbers (such as hydrotalcite)
Wichtigste Erkenntnis
The compatibility of the flame retardant system with equipment materials is the prerequisite for long-term stable production
War das hilfreich?
0 Personen fanden dies hilfreich
Vielen Dank für Ihr Feedback!