Useful. The main functions of rust conversion agent include rust removal and the formation of rust protection layer. It reacts with iron oxide through chemical reaction to generate stable inorganic compounds, which combine with metal matrix to form anti-corrosion protective layer to prevent the metal surface from rusting again. Rust conversion agent can also improve the corrosion resistance of metal surface, thus prolonging the service life of metal products. In addition, rust conversion agent usually has environmental protection characteristics, and does not use heavy metal ions or other substances harmful to the environment, so it has less pollution to the environment. Suitable for all kinds of metal products, such as steel structure, mechanical equipment, pipes, doors and windows, auto parts, etc. Can be directly coated on the metal surface without other processing steps.