Heat exchanger corrosion prevention Flue gas can contain corrosive elements, causing heat exchangers to rust. Polymer bundles in heat exchangers prevent corrosion. The polymer bundles contain polymer tubes that are interconnected and form a strong honeycomb structure. Heat exchanger blocking prevention Heat exchanger blocking is caused by accumulating fouling elements in the heat exchanger. Fouling elements don't bind well to polymer surface. The ability of polymer to cope with corrosive and fouling elements makes it very well suited for the application in heat exchangers to recover industrial waste heat.