RLN-27 DERUSTING CHEMICAL RLN is a commonly used abbreviation for Rust and Lime Neutralizer. It's a type of chemical solution used to remove rust and lime scale deposits from metal surfaces. These solutions typically contain acidic compounds that dissolve the rust and lime scale, making it easier to remove them from the surface. RLN chemicals are often used in industrial settings, such as in manufacturing plants or maintenance facilities, where metal surfaces are prone to corrosion and buildup of mineral deposits. It's important to follow safety guidelines and use appropriate protective equipment when handling RLN chemicals, as they can be corrosive and harmful if not handled properly.