corrosion resistant plastic scraper Non-Metallic Sludge Scrapers for Corrosive Media | 18-Yr Expertise

A corrosion resistant plastic scraper is the definitive solution to the most pervasive problem in wastewater sedimentation: metal corrosion. In the anaerobic environment at the bottom of a clarifier, sulfate-reducing bacteria produce hydrogen sulfide, which oxidizes to form sulfuric acid. This acid attacks carbon steel, causing rapid thinning, pitting, and ultimate failure of traditional scrapers. Plastic scrapers, fabricated from inert polymers like HDPE, UHMW-PE, and PP, are completely immune to this electrochemical attack. They will not rust, pit, or lose cross-sectional strength over time. This resistance extends to a wide range of other corrosive agents, including chlorides, weak acids, and alkalis found in various industrial effluents. This fundamental property transforms the operational paradigm for treatment plants. It eliminates downtime and costs associated with repairing and replacing corroded metal scrapers. It removes the risk of catastrophic structural failure that could shut down a critical clarifier. The scraper's performance remains consistent throughout its life, as the blade profile does not degrade from corrosion. We specialize exclusively in the manufacture of these corrosion-resistant scrapers, providing a permanent and maintenance-free answer to the challenge of sludge collection in corrosive environments. For a detailed comparison of corrosion resistance between materials, we invite you to contact our materials engineering department.