Derusting chemical RLN-27 - RLN-27 is a type of chemical commonly used for rust removal and surface preparation. Derusting chemicals like RLN-27 are typically formulated to efficiently remove rust, oxides, and other surface contaminants from metal without causing significant damage to the underlying material. 1. Features of RLN-27 (General) - Acid-based formulation: RLN-27 usually contains mild acids to dissolve rust and oxides, leaving the metal clean and ready for further treatment. - Non-toxic or low toxicity: Designed to be safer for users compared to harsher chemicals. - Rust inhibitor: Often includes agents that prevent flash rusting after the rust removal process.