One of the best chemicals for removing rust is phosphoric acid. Phosphoric acid is a strong acid that reacts with iron oxide (rust) to form iron phosphate, which can be easily removed. It can be found in many commercial rust removal products or can be purchased in a concentrated form and diluted with water for use.
Another effective rust remover is vinegar, which contains acetic acid. Vinegar is a milder acid than phosphoric acid, but it can still dissolve rust effectively. Simply soaking the rusted object in vinegar for a few hours or overnight can often loosen and dissolve the rust.
Other options for rust removal include citric acid, hydrochloric acid, and oxalic acid. However, it's important to use these chemicals carefully and follow all safety precautions, as they can be dangerous if not handled properly.
HD Chemicals LTD is the best place you can find online to buy chemicals for rust removing .