Derusting, Descaling, Desmuting and pickling Chemicals are very effective in removing rust, scales, welding scalesbesides removing thin film of oil and grease. It is not desirable to treat metals in hydrochloric acid to remove rust. Derusting chemicals is relatively safe chemicals for chemical cleaning, since the product has been formulated wholly with environmental safe acids, surfactants, inhibitors etc. It will eliminate all drawbacks of mineral acids.