NTP also has a solution for polymers that are very corrosive in nature like PVC with calcium and other fillers which caused immense corrosion to the screw results in the burning of resin inside the barrel. So we have come up with some good solutions for the corrosion of screws. Our Highly corrosion-resistant screws are made up of some selective material combinations and coatings which comply with the materials depending upon the polymer to be processed.