†Revitalizing Concrete Trench Drains: A Long-Lasting Fix Concrete trench drains, often overlooked but essential, serve as vital channels for managing surface water or safely containing utilities and chemical spills. These structures are especially critical in industrial settings where efficiency and safety are top priorities. However, over time, concrete trenches can suffer from a range of damaging factors—fire, aggregate expansion, seawater exposure, bacterial activity, calcium leaching, physical stress, and chemical attacks like carbonation, chlorides, and sulfates. This degradation weakens the structure, leading to leaks, reduced strength, and costly repairs or replacements. A recent case involved a battery distribution plant that had been operating for just over a decade. Initially protected by a novolac coating, the system eventually failed, allowing corrosive acid from the battery-forming process to seep into the concrete. The acid bath, which contained diluted sulfuric acid (H2SO4) with a pH between 1 and 2, caused severe damage. Within two sections of the trench, the concrete had eroded to about half its original thickness, leaving nearly 35% of the structure compromised. Without immediate action, the facility faced a potential failure within a year. To address the issue, HJ3 implemented a comprehensive repair strategy. First, they removed all damaged concrete using abrasive blasting. Then, they applied HJ3’s CarbonSeal primer and high-modulus paste to prepare the surface. Next, they embedded CarbonSeal carbon fiber fabric into the trench, extending it up to the 2†x 2†shelf. To ensure long-term protection, a chemical-resistant top coat was applied, covering the entire surface and extending 1†beyond the edge. This coating is specifically designed to withstand concentrations of up to 98% sulfuric acid, offering reliable defense against future corrosion. Corrosion is a global challenge, costing industries over $6 trillion annually in direct and indirect losses. Replacing entire concrete trenches can be both expensive and disruptive, involving significant costs in materials, labor, and downtime. In contrast, HJ3’s CarbonSeal system provided a faster, more cost-effective solution. The facility was back online within a week, saving 85% compared to full replacement. With this repair, the trenches are now ready to handle continuous exposure to harsh chemicals, ensuring smooth operations for years ahead. If you're facing similar challenges with your concrete trenches—whether it's structural weakness, chemical exposure, or ongoing corrosion—HJ3’s CarbonSeal system offers a proven, durable solution. Contact our project managers today to learn how we can help protect and extend the life of your infrastructure. †Bimetallic injection screw, PTA bimetallic screw, JYS series bimetallic screw, Plasma Transferred Arc technology, high wearing corrosion resistant bimetallic screw. Ningbo Jinyi Preicison Machinery Co., Ltd has developped series of bimetallic screws, including JYS1, JYS2 and JYS3, which suits for different hardness and wear / corrosion resistance requirements. Bimetallic Extruder Screw & Barrel,Bimetallic Screw Barrel,Bimetallic Screw and Barrel Ningbo Jinyi Precision Machinery Co., Ltd. , https://www.jinyi-machinery.com
