Hard metal coating protects against acids

STC tungsten carbide coating Battenfeld-Cincinnati's coating for plasticizing units in extruders combines the abrasion- and erosion-resistance of tungsten carbide metals with an extremely strong resistance to chlorine and bromine halide acids. The company says the coating is particularly appropriate for PVC compounds with high filler content, PE with abrasive colorants, post-consumer regrind and PP with talcum or fiberglass content. Depending on the need, it can be applied to select parts of the screw geometry, or be used to coat the entire screw. 

What's new? The coating, which Battenfeld-Cincinnati says is the first hard metal coating made by an extruder manufacturer for all extrusion applications, regardless of the equipment's maker. The company says it is still looking for customer test sites of the coating in the United States.

Benefits Hardness and toughness. The coating provides extra chemical and physical wear-resistance for a longer operating life.

Battenfeld-Cincinnati USA, McPherson, Kan., 620-241-6843, www.battenfeld-cincinnati.com