The Acid and Alkali Resistant Flying Scraper is a specialized system constructed from materials that maintain their structural integrity and functionality when exposed to pH extremes. Material selection is critical and is based on the specific type and concentration of acid or alkali, as well as temperature. Options include various stainless steels (e.g., 316 for weak acids, 904L for sulfuric acid), fiberglass reinforced plastic (FRP), polypropylene, PVDF, or rubber-lined steel. For highly concentrated acids or alkalis at elevated temperatures, more exotic alloys like Hastelloy may be required. Every component of the scraper—structure, flights, bolts, and bearings—is selected for chemical compatibility to prevent catastrophic failure. These scrapers are essential in industries such as metal finishing (pickling baths), chemical manufacturing, paper production (caustic streams), and mining (acid mine drainage). In a steel pickling line, for instance, wastewater sludge is highly acidic and contains metal hydroxides; a scraper made from a suitable alloy or FRP ensures continuous operation without corrosion-induced breakdown. This specialized equipment protects the treatment process from interruption and avoids the safety and environmental hazards associated with equipment failure in such harsh conditions. We strongly advise consulting with our engineers to specify the correct material of construction for your specific acid or alkali exposure. Please contact us for a detailed chemical resistance review and recommendation.
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