The green discoloration you see on copper is a type of corrosion called verdigris. It forms when copper reacts with oxygen and moisture in the air.
There are various methods to remove green from copper:
Using Household Products:
- Salt: Cover the surface with salt and rub vigorously with a microfiber cloth.
- Ketchup: Rub ketchup over the affected areas and let it sit for 20 minutes.
- Vinegar and Baking Soda: Create a paste by combining equal parts baking soda, salt, white vinegar, and flour. Smear the paste over the oxidized area.
- Lemon Juice and Salt: Mix lemon juice and salt at a 3:1 ratio. Apply the paste to the copper and let it sit for a few minutes.
Using Chemical Solutions:
- Hot Salty Vinegar: This solution can help remove oxides.
- Hydrochloric Acid: May be the most effective option for removing verdigris. However, use with extreme caution as it is highly corrosive.
Other Methods:
- Emery Cloth: Use an emery cloth to gently scrub the verdigris off.
- Acetone: Acetone can be used to remove green corrosion, but be careful as it can damage the copper if used improperly.
Important Notes:
- Never use abrasive tools or cleaners on copper.
- Test any cleaning solution on a small, inconspicuous area first.
- Always wear protective gloves and eye protection when using any cleaning solution.
