Restoring Rusty Tools with Washing Soda

Rust is the enemy of metal tools, but you don't need harsh chemicals to remove it. Sodium carbonate (washing soda) provides a safe, effective method for electrolytic rust removal.

What You'll Need

  • Washing soda (sodium carbonate)
  • Large plastic container
  • 12V battery charger or power supply
  • Steel electrode (rebar or scrap steel)
  • Wire brush
  • Protective gloves and eyewear

The Process

  1. Prepare the solution: Mix 1 tablespoon of washing soda per gallon of water in your container.
  2. Set up electrodes: Connect the positive lead to a steel electrode and the negative to your rusty tool.
  3. Submerge: Place both in the solution without touching each other.
  4. Run the current: Leave for 2–12 hours depending on rust severity.
  5. Clean and protect: Scrub with a wire brush, rinse, dry, and oil immediately.

Safety Notes

  • Work in a ventilated area
  • Hydrogen gas is produced — keep away from sparks
  • Wear eye protection
  • Don't use stainless steel as the anode

This method removes rust without damaging the underlying metal, making it perfect for restoring vintage tools and implements.