How to Remove Rust With Acid Dips

It takes an acidic mixture to remove rust.

Rust can damage metals, both structurally and visually. It can be removed at home by scrubbing with store-bought rust removers, or applying a paste of baking soda and lemon juice and scrubbing with aluminum foil. Professionals use an acid dip system for rust removal, as this is the easiest way to remove rust at home. An oxalic or muriatic acid dip will remove the rust without scrubbing. The metal must then be rinsed thoroughly, including all cracks and crevices, to remove any excess acid.

Things You'll Need

• Large bucket or drum
• Acid crystals
• Hot water
• Stir stick

Instructions

1. Scoop out 4 oz. of acid crystals or powder for every gallon of water you will be adding. Pour this into your bucket or drum. Oxalic acid does not have the harsh fumes of muriatic acid, but a well -area is still recommended.

2. Pour in 1 gallon of warm or hot water. Stir the crystals until mixed. Add the rest of the water 1 gallon at a time and mix until you have enough of the mixture to completely submerge your metal.

3. Slide your metal into the solution.

4. Soak for 12 hours. Check for remaining rust. If all the rust is gone, remove the metal. If rust remains, leave it in the solution for 12 more hours.

5. Use a pressure washer or pressurized hose to rinse the metal. Make sure to rinse all crevices well.

References

• The Rust Stops Here: Remove, Repair and Prevent Rust - Metal stripping and Acid dipping
• MetalWorks: Acid Dipping Paint and Rust Removal