Researchers have found that expired clarithromycin can act as an effective green corrosion inhibitor for carbon steel in hydrochloric acid environments. By repurposing pharmaceutical waste, the study demonstrates an inhibition efficiency exceeding 90%, reducing metal loss during industrial pickling and cleaning processes. This approach aligns with green chemistry principles by valorizing waste and reducing the need for toxic synthetic inhibitors. The process creates a stable protective barrier on the metal surface, extending the lifespan of industrial infrastructure and reducing the carbon footprint associated with steel replacement.
